ROLLOUT 4 · python-tap/tappy
python-tap__tappy-112
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System instructions 4,822 characters
You are a principal Python software engineer resolving a repository issue in `/workspace`. Your sole objective is to produce a minimal, root-cause source patch that passes every hidden fail-to-pass and pass-to-pass regression test on the first grading run. ## Critical Environment & Grader Rules 1. **Air-Gapped Sandbox & Available CLI Tools**: No network access. Never run `pip`, `uv`, `conda`, or `git fetch`. Note: `rg` (`ripgrep`) is NOT installed in the container — always use `grep -rn --include="*.py"` for fast exact searches so you never waste a tool call on `command not found`. 2. **Protected Grading Paths**: Before running official verification, the grading harness **strips and reverts all changes** to `tests/`, `test/`, `testing/`, `test_*.py`, `*_test.py`, `conftest.py`, `pyproject.toml`, `setup.cfg`, `pytest.ini`, and `tox.ini`. Every part of your fix MUST reside in non-test production source files. 3. **Untracked File Trap (`git add -N .`)**: `submit_patch` stages ALL untracked files inside `/workspace`! Never leave reproduction or scratch files inside `/workspace` — run reproductions inline via `python3 - <<'PY'` or inside `/tmp/repro.py` in a single `run_command`. 4. **Stdout Truncation Rule**: `run_command` truncates stdout after the first 5,000 characters from the TOP. Always run pytest quietly with short tracebacks: `pytest path/to/test_file.py -k pattern -q --tb=short --no-header` If a test file is large, redirect output to `/tmp/pytest.log` and inspect `tail -n 80 /tmp/pytest.log` so failure tracebacks at the bottom are never cut off. 5. **Strict Pacing Discipline**: `get_status` and `submit_patch` are free and do NOT count toward `max_tool_calls`. Target **16-22 counted tool calls total**, and **begin your first `edit_file` change no later than tool call 15**. Reserve at least 4 calls for verification, `git status --short && git diff`, and submission. ## Execution Protocol ### Phase 1 — Pinpoint Code & Tests Immediately (1-2 tool calls) - The user message already contains `Workspace Layout` — do NOT waste a turn running `ls` on top-level directories. - Run a single compound `run_command` with `grep -rn --include="*.py"` to locate: (a) the exact symbols, error strings, or functions from the problem description, (b) **all parallel or sibling implementations** (for example sync + async variants, `Client` + `AsyncClient`, serializer + deserializer, multiple backends/dialects, base + subclass methods, `__init__.py` / `__all__` exports), and (c) the closest existing unit test files under `tests/`. ### Phase 2 — Deep Read & Spec Anchor (2-5 tool calls) - Use `read_file` with generous `start_line` and `end_line` windows (180-300 lines per call so you read whole modules in fewer calls) on the target function/class, callers, type annotations, and neighboring tests. - Before editing, verify every explicit and implicit requirement from the issue: exact parameter names, defaults, boundary/domain edge cases, exception types/messages, `None` vs empty collection vs falsy (`0`, `False`, `""`) semantics, mutability/copying, and return types. ### Phase 3 — Reproduce Bug in One Call (1 tool call) - Run ONE concise command (`python3 - <<'PY' ... PY` or targeted `pytest ... -q --tb=short --no-header`) via `run_command` to observe the exact pre-fix failure. Do NOT spend multiple tool calls writing separate reproduction scripts. ### Phase 4 — Surgical Implementation Across All Parallel Paths (1-4 tool calls) - Begin editing by tool call 15! Use `edit_file` with 4-6 lines of exact surrounding context copied from `read_file`. - Update ALL parallel codepaths (sync/async, multiple classes/dialects, type hints) consistently so partial fixes do not fail sibling tests. - **2-Strike Edit Rule**: If `edit_file` fails twice on the same block due to whitespace or escaping, do not retry `edit_file` a third time — apply an atomic Python transformation via `run_command` and immediately verify `python3 -m py_compile path/to/file.py`. ### Phase 5 — Edge-Case Verification, Diff Hygiene & Clean Exit (2-4 tool calls) - Run a single compound `run_command` testing both your reproduction + boundary edge cases (`None`, empty input, leading/trailing delimiters, subdomain/prefix boundaries, subclass/async parity) AND the relevant existing `pytest` module(s) with `-q --tb=short --no-header`. - Run `git status --short && git diff` via `run_command`. Confirm: - ZERO untracked (`??`) files in `/workspace` (`rm -f` any untracked workspace files immediately), - ZERO modifications to `tests/` or protected config files (`git checkout -- tests/` if touched), - Minimal, clean diff with valid imports and indentation. - Call `submit_patch` once verification passes, then respond with a brief 2-sentence plain-text summary and make NO further tool calls.
Task prompt 5,407 characters
You are evaluating a software engineering task for repository python-tap/tappy.
Problem Statement:
Additional newlines added in YAML blocks for multi-line strings
Hello!
I've observed that `_extract_yaml_block()` performs `"\n".join(raw_yaml)` without having stripped the newline character in each possible line, resulting in unwanted empty lines when parsing multi-line strings in YAML blocks.
I'll give an example. With this file:
```python
#!/usr/bin/python3
import tap.parser
tap_input = """TAP version 13
1..2
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
"""
parser = tap.parser.Parser()
for i, l in enumerate(parser.parse_text(tap_input)):
if i == 2:
print("{!r}".format(l.yaml_block["output"].splitlines()))
```
The output is:
```
['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']
```
Where as I expected:
```
['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']
```
I will submit a PR shortly.
## Hints:
codecov-io: # [Codecov](https://codecov.io/gh/python-tap/tappy/pull/112?src=pr&el=h1) Report
> Merging [#112](https://codecov.io/gh/python-tap/tappy/pull/112?src=pr&el=desc) into [master](https://codecov.io/gh/python-tap/tappy/commit/015c21c1a98b88f23844a44e346604f2398b11d5&el=desc) will **not change** coverage.
> The diff coverage is `100.00%`.
[](https://codecov.io/gh/python-tap/tappy/pull/112?src=pr&el=tree)
```diff
@@ Coverage Diff @@
## master #112 +/- ##
=========================================
Coverage 100.00% 100.00%
=========================================
Files 12 12
Lines 599 600 +1
=========================================
+ Hits 599 600 +1
```
| [Impacted Files](https://codecov.io/gh/python-tap/tappy/pull/112?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [tap/parser.py](https://codecov.io/gh/python-tap/tappy/pull/112/diff?src=pr&el=tree#diff-dGFwL3BhcnNlci5weQ==) | `100.00% <100.00%> (ø)` | |
------
[Continue to review full report at Codecov](https://codecov.io/gh/python-tap/tappy/pull/112?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/python-tap/tappy/pull/112?src=pr&el=footer). Last update [015c21c...05c6b82](https://codecov.io/gh/python-tap/tappy/pull/112?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
## Task Budget (Session terminates when any budget is exhausted)
- Time allowance: 7.5 minutes
- Tool calls allowance: 30 calls
- Max loop iterations: 40 turns
## Execution Environment Rules
- Single command timeout: 90 seconds (commands exceeding this fail without ending the session)
- Command output limit: 5000 characters
- File view limit: 150 lines per read_file call
- File character limit: 10000 characters per read_file call
- Environment is offline (no network/PyPI access). All repository and test dependencies are ALREADY pre-installed. Do NOT attempt to run pip install or download packages.
## Instructions:
0. All source code is under `/workspace`. Do NOT search outside `/workspace` (e.g. `/usr/`, `/wheels/`, system site-packages). If imports fail, the issue is in the source code under `/workspace`, not in missing system packages.
1. Analyze the problem statement and any provided hints carefully to identify all requested script paths, CLI subcommands, or Python modules.
2. Inspect existing codebase conventions and test files before making edits.
3. Verify your implementation using targeted tests or inline assertions before submitting.
4. Call submit_patch only after your implementation is complete and verified.
5. As your final action, you must return a text-only response reporting your completion to terminate the session.
## Workspace Layout
The repository is located at `/workspace`. Here is the directory tree (up to 3 levels):
```
./AUTHORS
./CODE_OF_CONDUCT.md
./LICENSE
./MANIFEST.in
./README.md
./appveyor.yml
./docs
./requirements-dev.txt
./setup.cfg
./setup.py
./tap
./tap/__init__.py
./tap/__main__.py
./tap/adapter.py
./tap/directive.py
./tap/formatter.py
./tap/i18n.py
./tap/line.py
./tap/loader.py
./tap/locale
./tap/locale/ar
./tap/locale/de
./tap/locale/es
./tap/locale/fr
./tap/locale/it
./tap/locale/ja
./tap/locale/nl
./tap/locale/pt
./tap/locale/ru
./tap/locale/tappy.pot
./tap/locale/zh
./tap/main.py
./tap/parser.py
./tap/rules.py
./tap/runner.py
./tap/tests
./tap/tests/__init__.py
./tap/tests/factory.py
./tap/tests/run.py
./tap/tests/test_adapter.py
./tap/tests/test_directive.py
./tap/tests/test_formatter.py
./tap/tests/test_line.py
./tap/tests/test_loader.py
./tap/tests/test_main.py
./tap/tests/test_parser.py
./tap/tests/test_result.py
./tap/tests/test_rules.py
./tap/tests/test_runner.py
./tap/tests/test_tracker.py
./tap/tests/testcase.py
./tap/tracker.py
./tox.ini
./transifex.py
```
Turn 1at 28 s532 tokens out3,856 prompt tokens
The user is reporting a bug in `tap/parser.py` where `_extract_yaml_block()` is adding extra newlines to YAML blocks for multi-line strings.
The provided example:
```python
tap_input = """TAP version 13
1..2
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
"""
parser = tap.parser.Parser()
for i, l in enumerate(parser.parse_text(tap_input)):
if i == 2:
print("{!r}".format(l.yaml_block["output"].splitlines()))
```
Output is: `['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
Expected: `['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
The root cause seems to be that `_extract_yaml_block()` joins lines with `"\n"` but the lines themselves already contain newline characters from the input.
Plan:
1. Create a reproduction script based on the provided example.
2. Locate `_extract_yaml_block` in `tap/parser.py`.
3. Read the code around `_extract_yaml_block`.
4. Fix the bug by stripping newlines from lines before joining them, or using a better way to reconstruct the YAML block.
5. Verify the fix.
Let's start by reproducing the bug.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport tap.parser\n\ntap_input = \"\"\"TAP version 13\n1..2\nok 1 A passing test\n ---\n message: test\n severity: fail\n output: |+\n this is a multiline\n string but with tap\n somehow blank lines\n are added to it.\n\"\"\"\nparser = tap.parser.Parser()\n\nfor i, l in enumerate(parser.parse_text(tap_input)):\n if i == 2:\n print(\"{!r}\".format(l.yaml_block[\"output\"].splitlines()))\nPY\n"
}Result of run_command 167 characters
{
"status": "ok",
"stdout": "['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']\n",
"stderr": "",
"exit_code": 0
}Turn 2at 32 s61 tokens out4,460 prompt tokens
The reproduction confirms the bug. Now let's find `_extract_yaml_block` in `tap/parser.py`.
TOOL CALL · run_command
{
"command": "grep -rn \"def _extract_yaml_block\" tap/parser.py"
}Result of run_command 112 characters
{
"status": "ok",
"stdout": "177: def _extract_yaml_block(self, indent, fh):\n",
"stderr": "",
"exit_code": 0
}Turn 3at 36 s55 tokens out4,579 prompt tokens
Let's read `tap/parser.py` around line 177.
TOOL CALL · read_file
{
"end_line": 210,
"filepath": "tap/parser.py",
"start_line": 170
}Result of read_file 1,318 characters
{
"status": "ok",
"filepath": "tap/parser.py",
"content": " ok,\n number=match.group(\"number\"),\n description=match.group(\"description\").strip(),\n directive=Directive(match.group(\"directive\")),\n raw_yaml_block=concat_yaml,\n )\n\n def _extract_yaml_block(self, indent, fh):\n \"\"\"Extract a raw yaml block from a file handler\"\"\"\n raw_yaml = []\n indent_match = re.compile(r\"^{}\".format(indent))\n try:\n next(fh)\n while indent_match.match(fh.peek()):\n raw_yaml.append(next(fh).replace(indent, \"\", 1))\n # check for the end and stop adding yaml if encountered\n if self.yaml_block_end.match(fh.peek()):\n next(fh)\n break\n except StopIteration:\n pass\n return \"\\n\".join(raw_yaml)\n\n def _parse_version(self, match):\n version = int(match.group(\"version\"))\n if version < self.TAP_MINIMUM_DECLARED_VERSION:\n raise ValueError(\n _(\"It is an error to explicitly specify any version lower than 13.\")\n )\n return Version(version)",
"start_line": 170,
"end_line": 199,
"total_lines": 199,
"is_truncated": false
}Turn 4at 63 s414 tokens out5,022 prompt tokens
The issue is indeed here:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
```
The `next(fh)` call (when `fh` is presumably a file or an iterator of lines) usually includes the newline character at the end of the line. Then `"\n".join(raw_yaml)` adds another newline.
Wait, if `fh` is a file object, `next(fh)` returns the line including the newline.
The `replace(indent, "", 1)` only removes the leading indent.
If `raw_yaml` contains lines like `["line1\n", "line2\n"]`, then `"\n".join(raw_yaml)` produces `"line1\n\nline2\n"`. This explain the extra newlines.
I should strip the trailing newline from each line before adding it to `raw_yaml`, or maybe just use `rstrip('\n')` (or `rstrip('\r\n')`).
Wait, the TAP specification for YAML blocks: they are indented.
Let's check how `fh` is passed to `_extract_yaml_block`.
Turn 5at 63 s
<|tool_call>call:grep -rn "self._extract_yaml_block" tap/parser.py<|"|>}<tool_call|>
System instructions 286 characters
Your previous response reached the token limit before the tool call finished closing (<|tool_call|> was cut off). Do NOT repeat your prior reasoning in thought—emit your next tool call immediately, and if calling edit_file or write_file, split the change into smaller incremental edits.
Turn 6at 65 s35 tokens out4,674 prompt tokens
TOOL CALL · run_command
{
"command": "grep -rn \"self._extract_yaml_block\" tap/parser.py"
}Result of run_command 124 characters
{
"status": "ok",
"stdout": "168: concat_yaml = self._extract_yaml_block(indent, fh)\n",
"stderr": "",
"exit_code": 0
}Turn 7at 214 s2,428 tokens out4,765 prompt tokens
The `_extract_yaml_block` function reads lines from the file handler `fh`, strips the leading indentation, and then joins them with `\n`.
The problem is that `next(fh)` returns lines that *already* contain the newline character `\n` at the end (assuming `fh` is a standard file-like object or `io.StringIO` which is likely the case when `parse_text` is called).
When `"\n".join(raw_yaml)` is called, it inserts an additional newline between each line that already has a newline.
Example:
`raw_yaml` contains `['line1\n', 'line2\n', 'line3\n']`
`"\n".join(raw_yaml)` becomes `'line1\n\nline2\n\nline3\n'`
This explains the "additional newlines" described in the issue.
Wait, let's look at `_extract_yaml_block` again:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
```
If `fh` contains lines with trailing newlines, `next(fh)` returns them.
`raw_yaml.append(next(fh).replace(indent, "", 1))` adds the line with the newline.
Then `"\n".join(raw_yaml)` adds *another* newline.
The fix should be to strip the trailing newline from each line before appending it to `raw_yaml`, OR just use `"".join(raw_yaml)` if we want to keep the original newlines. However, `rstrip('\n')` or `rstrip('\r\n')` is safer if we want to control the joining character.
In Python, `line.rstrip('\n')` removes the trailing newline. If we do that, then `"\n".join(raw_yaml)` will be correct.
Actually, if the lines already have newlines, we can just use `"".join(raw_yaml)` but we might need to handle the last line if it doesn't have one.
Wait, if I use `rstrip('\n')`, it might strip other characters if I use `rstrip()`. `rstrip('\n')` only strips newlines. But what about `\r\n`?
Let's see how `next(fh)` behaves. Usually, it's opened in universal newlines mode.
Let's verify the current behavior with a small script to see exactly what's in `raw_yaml`.
Actually, looking at the reported output:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
This is the result of `l.yaml_block["output"].splitlines()`.
If the original string was `"this is a multiline\nstring but with tap\n..."` then `splitlines()` would give `['this is a multiline', 'string but with tap', ...]`.
The fact that there are empty strings `''` in between means there were double newlines `\n\n`.
If `raw_yaml` was `[' this is a multiline\n', ' string but with tap\n', ...]`
And `replace(indent, "", 1)` was called, we get `['this is a multiline\n', 'string but with tap\n', ...]`
Then `"\n".join(...)` results in `'this is a multiline\n\nstring but with tap\n\n...'`
Yes, that's exactly what's happening.
The fix is to remove the trailing newline from the line before adding it to `raw_yaml`.
Or better, since we are joining with `\n`, we should ensure each line does not have a trailing newline.
However, `rstrip('\n')` might be too aggressive if the YAML value itself ends with spaces that should be preserved (though unlikely for the line endings in this context). `rstrip('\r\n')` or `rstrip('\n')` is better.
Actually, Python's `splitlines()` is often used.
Another way is to use `"".join(raw_yaml)` instead of `"\n".join(raw_yaml)`. But wait, if the last line of the YAML block didn't have a newline (e.g. end of file), `"".join` would be fine. If we use `"\n".join`, we might add a trailing newline that wasn't there.
Actually, looking at `_extract_yaml_block`, it reads lines from `fh`.
If we use `.rstrip('\n')` on each line:
`raw_yaml.append(next(fh).rstrip('\n').replace(indent, "", 1))`
Wait, the `replace(indent, "", 1)` should happen first, then `rstrip('\n')`. Or vice versa.
Actually, the indentation is at the start.
`line = next(fh)` -> `" line content\n"`
`line.replace(indent, "", 1)` -> `"line content\n"`
`line.replace(indent, "", 1).rstrip('\n')` -> `"line content"`
Is it possible that the line is just the indentation and a newline?
`" \n"` -> replace indentation -> `"\n"` -> rstrip -> `""`
Then `"\n".join(["", ""])` -> `"\n"`. Correct.
Let's check if there are other occurrences of this pattern.
Also, I should check if `fh.peek()` is used elsewhere.
`fh` seems to be some kind of iterator that supports `peek()`. Looking at `tap/parser.py`, the `Parser.parse_text` likely uses something that implements `peek()`.
Wait, if I use `rstrip('\n')`, will it remove `\r` on Windows?
In universal newline mode, `\r\n` is converted to `\n`.
Let's try to reproduce and verify the fix.
Reproduction script:
```python
import tap.parser
tap_input = """TAP version 13
1..2
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
"""
parser = tap.parser.Parser()
for i, l in enumerate(parser.parse_text(tap_input)):
if i == 2:
print("{!r}".format(l.yaml_block["output"].splitlines()))
```
Expected: `['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
Actual: `['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
Wait, why the leading empty string `''`?
`output: |+`
` this is a multiline\n`
The first line read by `_extract_yaml_block` is the one after `output: |+`.
Wait, the YAML block starts *after* the line containing `---`? No, the YAML block starts with `---` and ends with the line that doesn't start with the indentation.
Let's trace `_extract_yaml_block` in `tap/parser.py`:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh) # This consumes the line that triggered the YAML block (the one with '---')
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
```
The line with `---` is consumed by `next(fh)`.
Then it enters the loop if the next line starts with `indent`.
In the example:
```
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
1. `ok 1 A passing test` is parsed.
2. ` ---` is encountered. `indent` is likely `" "`.
3. `_extract_yaml_block` is called.
4. `next(fh)` consumes ` ---\n`.
5. Next lines:
` message: test\n` -> matches indent, `raw_yaml.append("message: test\n")`
` severity: fail\n` -> matches indent, `raw_yaml.append("severity: fail\n")`
` output: |+\n` -> matches indent, `raw_yaml.append("output: |+\n")`
` this is a multiline\n` -> matches indent, `raw_yaml.append(" this is a multiline\n")`
...
6. Finally `"\n".join(raw_yaml)` results in:
`"message: test\n\nseverity: fail\n\noutput: |+\n\n this is a multiline\n\n..."`
Wait, this is a YAML block. Tappy's `Parser` just extracts the raw YAML block and then (presumably) passes it to a YAML parser.
Looking at `tap/parser.py`, where is the YAML parsed?
I saw `raw_yaml_block=concat_yaml` in the `Line` (or similar) object.
Let's find where `yaml.safe_load` (or similar) is called.
I'll search for `yaml.` in `tap/parser.py`.
TOOL CALL · run_command
{
"command": "grep -rn \"yaml.\" tap/parser.py"
}Result of run_command 852 characters
{
"status": "ok",
"stdout": "14: import yaml # noqa\n58: yaml_block_start = re.compile(r\"^(?P<indent>\\s+)-\")\n59: yaml_block_end = re.compile(r\"^\\s+\\.\\.\\.\")\n107: ignored. To parse yaml, see requirements in docs:\n157: peek_match = self.yaml_block_start.match(fh.peek())\n168: concat_yaml = self._extract_yaml_block(indent, fh)\n174: raw_yaml_block=concat_yaml,\n177: def _extract_yaml_block(self, indent, fh):\n178: \"\"\"Extract a raw yaml block from a file handler\"\"\"\n179: raw_yaml = []\n184: raw_yaml.append(next(fh).replace(indent, \"\", 1))\n185: # check for the end and stop adding yaml if encountered\n186: if self.yaml_block_end.match(fh.peek()):\n191: return \"\\n\".join(raw_yaml)\n",
"stderr": "",
"exit_code": 0
}Turn 8at 224 s151 tokens out7,514 prompt tokens
Wait, it seems `tap/parser.py` doesn't actually call `yaml.safe_load` inside `Parser`? Or maybe it does. Let me check the `Line` class or wherever the result of `Parser.parse_text` goes. The example says `l.yaml_block["output"]`. This suggests that the result of `parser.parse_text` is an object (likely a `Line` object) that has a `yaml_block` attribute which is already a dictionary (parsed YAML). Let's look at the `Line` class in `tap/line.py`.
TOOL CALL · read_file
{
"filepath": "tap/line.py"
}Result of read_file 3,934 characters
{
"status": "ok",
"filepath": "tap/line.py",
"content": "# Copyright (c) 2019, Matt Layman and contributors\ntry:\n import yaml\n\n LOAD_YAML = True\nexcept ImportError: # pragma: no cover\n LOAD_YAML = False\n\n\nclass Line(object):\n \"\"\"Base type for TAP data.\n\n TAP is a line based protocol. Thus, the most primitive type is a line.\n \"\"\"\n\n @property\n def category(self):\n raise NotImplementedError\n\n\nclass Result(Line):\n \"\"\"Information about an individual test line.\"\"\"\n\n def __init__(\n self,\n ok,\n number=None,\n description=\"\",\n directive=None,\n diagnostics=None,\n raw_yaml_block=None,\n ):\n self._ok = ok\n if number:\n self._number = int(number)\n else:\n # The number may be an empty string so explicitly set to None.\n self._number = None\n self._description = description\n self.directive = directive\n self.diagnostics = diagnostics\n self._yaml_block = raw_yaml_block\n\n @property\n def category(self):\n \"\"\":returns: ``test``\"\"\"\n return \"test\"\n\n @property\n def ok(self):\n \"\"\"Get the ok status.\n\n :rtype: bool\n \"\"\"\n return self._ok\n\n @property\n def number(self):\n \"\"\"Get the test number.\n\n :rtype: int\n \"\"\"\n return self._number\n\n @property\n def description(self):\n \"\"\"Get the description.\"\"\"\n return self._description\n\n @property\n def skip(self):\n \"\"\"Check if this test was skipped.\n\n :rtype: bool\n \"\"\"\n return self.directive.skip\n\n @property\n def todo(self):\n \"\"\"Check if this test was a TODO.\n\n :rtype: bool\n \"\"\"\n return self.directive.todo\n\n @property\n def yaml_block(self):\n \"\"\"Lazy load a yaml_block.\n\n If yaml support is not available,\n there is an error in parsing the yaml block,\n or no yaml is associated with this result,\n ``None`` will be returned.\n\n :rtype: dict\n \"\"\"\n if LOAD_YAML and self._yaml_block is not None:\n try:\n yaml_dict = yaml.load(self._yaml_block, Loader=yaml.SafeLoader)\n return yaml_dict\n except yaml.error.YAMLError:\n print(\"Error parsing yaml block. Check formatting.\")\n return None\n\n def __str__(self):\n is_not = \"\"\n if not self.ok:\n is_not = \"not \"\n directive = \"\"\n if self.directive is not None and self.directive.text:\n directive = \" # {0}\".format(self.directive.text)\n diagnostics = \"\"\n if self.diagnostics is not None:\n diagnostics = \"\\n\" + self.diagnostics.rstrip()\n return \"{0}ok {1} {2}{3}{4}\".format(\n is_not, self.number, self.description, directive, diagnostics\n )\n\n\nclass Plan(Line):\n \"\"\"A plan line to indicate how many tests to expect.\"\"\"\n\n def __init__(self, expected_tests, directive=None):\n self._expected_tests = expected_tests\n self.directive = directive\n\n @property\n def category(self):\n \"\"\":returns: ``plan``\"\"\"\n return \"plan\"\n\n @property\n def expected_tests(self):\n \"\"\"Get the number of expected tests.\n\n :rtype: int\n \"\"\"\n return self._expected_tests\n\n @property\n def skip(self):\n \"\"\"Check if this plan should skip the file.\n\n :rtype: bool\n \"\"\"\n return self.directive.skip\n\n\nclass Diagnostic(Line):\n \"\"\"A diagnostic line (i.e. anything starting with a hash).\"\"\"",
"start_line": 1,
"end_line": 150,
"total_lines": 212,
"is_truncated": true
}Turn 9at 325 s1,451 tokens out8,831 prompt tokens
Yes, `Result.yaml_block` property does the lazy loading using `yaml.load(self._yaml_block, Loader=yaml.SafeLoader)`.
And `self._yaml_block` is what was passed as `raw_yaml_block` in `Parser.parse_text`.
So, if `_extract_yaml_block` returns a string with double newlines, `yaml.load` will see those double newlines.
In YAML, a multi-line string starting with `|+` (block scalar) preserves newlines.
Example in the issue:
```yaml
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
If `_extract_yaml_block` produces:
```yaml
message: test\n\nseverity: fail\n\noutput: |+\n\n this is a multiline\n\n string but with tap\n\n somehow blank lines\n\n are added to it.\n
```
(Note: the double `\n` come from `"\n".join(raw_yaml)` where `raw_yaml` entries already ended in `\n`)
Then `yaml.load` parses this.
The `output` field becomes a string starting with `\n` then ` this is a multiline\n\n string but with tap\n\n...`
Wait, YAML block scalar `|+` (or `|`) expects the content to be indented.
If the input to `yaml.load` is:
```
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
Then the value of `output` will be `\nthis is a multiline\n\nstring but with tap\n\n...`
This explains why `splitlines()` produces empty strings.
So the fix is definitely to avoid adding extra newlines in `_extract_yaml_block`.
I should change `"\n".join(raw_yaml)` to something that doesn't add extra newlines if they are already there.
But the safest way to handle potentially mixed line endings and ensure we don't change the content other than the unwanted extra newlines is to strip the trailing newline from each line before joining them with `\n`.
Wait, if I strip the trailing newline from each line, and then join with `\n`, I'm effectively normalizing line endings to `\n`.
Alternatively, if I just use `"".join(raw_yaml)`, it preserves exactly what was in the file.
Let's check if `raw_yaml` entries always have newlines.
They come from `next(fh)`. If `fh` is a file object, `next(fh)` always returns the line including the newline character unless it's the very last line of the file and it doesn't have one.
If I use `"".join(raw_yaml)`, I preserve the original newlines. This seems more correct and minimal.
Let's verify this with the reproduction script.
Wait, let's check if `indent` removal also leaves trailing spaces.
`raw_yaml.append(next(fh).replace(indent, "", 1))`
If the original line was `" line\n"`, it becomes `"line\n"`.
If I use `"".join(raw_yaml)`, the result is `"line1\nline2\nline3\n"`.
If I use `"\n".join(raw_yaml)` where `raw_yaml` is `["line1\n", "line2\n", "line3\n"]`, I get `"line1\n\nline2\n\nline3\n"`.
So `"".join(raw_yaml)` is the fix.
Let's double check if `_extract_yaml_block` could be called with something that doesn't have newlines.
`Parser.parse_text` implementation:
```python
def parse_text(self, text):
"""Parse a string of TAP text"""
import io
return self.parse(io.StringIO(text))
```
And `parse` probably calls `_extract_yaml_block` passing the `io.StringIO` object.
`io.StringIO` lines always end with `\n` since the input `text` likely contains them.
Let's test `"".join(raw_yaml)` with the reproduction script.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport tap.parser\nimport io\n\ndef _extract_yaml_block_original(self, indent, fh):\n raw_yaml = []\n import re\n indent_match = re.compile(r\"^{}\".format(indent))\n try:\n next(fh)\n while indent_match.match(fh.peek()):\n raw_yaml.append(next(fh).replace(indent, \"\", 1))\n if False: # simplified for test\n next(fh)\n break\n except StopIteration:\n pass\n return \"\\n\".join(raw_yaml)\n\ndef _extract_yaml_block_fixed(self, indent, fh):\n raw_yaml = []\n import re\n indent_match = re.compile(r\"^{}\".format(indent))\n try:\n next(fh)\n while indent_match.match(fh.peek()):\n raw_yaml.append(next(fh).replace(indent, \"\", 1))\n if False: # simplified for test\n next(fh)\n break\n except StopIteration:\n pass\n return \"\".join(raw_yaml)\n\n# Mock Parser object\nclass MockParser:\n def __init__(self):\n import re\n self.yaml_block_end = re.compile(r\"^\\\\s+\\\\.\\\\.\\\\.\")\n\nindent = \" \"\ntext = \" ---\\n message: test\\n severity: fail\\n output: |+\\n this is a multiline\\n string but with tap\\n somehow blank lines\\n are added to it.\\n\"\nfh = io.StringIO(text)\n\nprint(\"Original:\", repr(_extract_yaml_block_original(None, indent, fh)))\n\nfh.seek(0)\nprint(\"Fixed:\", repr(_extract_yaml_block_fixed(None, indent, fh)))\nPY\n"
}Result of run_command 579 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "Traceback (most recent call last):\n File \"<stdin>\", line 44, in <module>\n File \"<stdin>\", line 10, in _extract_yaml_block_original\nAttributeError: '_io.StringIO' object has no attribute 'peek'. Did you mean: 'seek'?\n",
"details": {
"stdout": "",
"stderr": "Traceback (most recent call last):\n File \"<stdin>\", line 44, in <module>\n File \"<stdin>\", line 10, in _extract_yaml_block_original\nAttributeError: '_io.StringIO' object has no attribute 'peek'. Did you mean: 'seek'?\n",
"exit_code": 1
}
}Turn 10at 332 s103 tokens out10,485 prompt tokens
Ah, `io.StringIO` doesn't have `peek()`. Tappy must be using a custom wrapper for the file handler. Let's check `tap/parser.py` again to see how it's used. I'll look for the `parse` method in `tap/parser.py`.
TOOL CALL · read_file
{
"end_line": 160,
"filepath": "tap/parser.py",
"start_line": 1
}Result of read_file 5,409 characters
{
"status": "ok",
"filepath": "tap/parser.py",
"content": "# Copyright (c) 2019, Matt Layman and contributors\n\nfrom io import StringIO\nimport itertools\nimport re\nimport sys\n\nfrom tap.directive import Directive\nfrom tap.i18n import _\nfrom tap.line import Bail, Diagnostic, Plan, Result, Unknown, Version\n\ntry:\n from more_itertools import peekable\n import yaml # noqa\n\n ENABLE_VERSION_13 = True\nexcept ImportError: # pragma: no cover\n ENABLE_VERSION_13 = False\n\n\nclass Parser(object):\n \"\"\"A parser for TAP files and lines.\"\"\"\n\n # ok and not ok share most of the same characteristics.\n result_base = r\"\"\"\n \\s* # Optional whitespace.\n (?P<number>\\d*) # Optional test number.\n \\s* # Optional whitespace.\n (?P<description>[^#]*) # Optional description before #.\n \\#? # Optional directive marker.\n \\s* # Optional whitespace.\n (?P<directive>.*) # Optional directive text.\n \"\"\"\n ok = re.compile(r\"^ok\" + result_base, re.VERBOSE)\n not_ok = re.compile(r\"^not\\ ok\" + result_base, re.VERBOSE)\n plan = re.compile(\n r\"\"\"\n ^1..(?P<expected>\\d+) # Match the plan details.\n [^#]* # Consume any non-hash character to confirm only\n # directives appear with the plan details.\n \\#? # Optional directive marker.\n \\s* # Optional whitespace.\n (?P<directive>.*) # Optional directive text.\n \"\"\",\n re.VERBOSE,\n )\n diagnostic = re.compile(r\"^#\")\n bail = re.compile(\n r\"\"\"\n ^Bail\\ out!\n \\s* # Optional whitespace.\n (?P<reason>.*) # Optional reason.\n \"\"\",\n re.VERBOSE,\n )\n version = re.compile(r\"^TAP version (?P<version>\\d+)$\")\n\n yaml_block_start = re.compile(r\"^(?P<indent>\\s+)-\")\n yaml_block_end = re.compile(r\"^\\s+\\.\\.\\.\")\n\n TAP_MINIMUM_DECLARED_VERSION = 13\n\n def parse_file(self, filename):\n \"\"\"Parse a TAP file to an iterable of tap.line.Line objects.\n\n This is a generator method that will yield an object for each\n parsed line. The file given by `filename` is assumed to exist.\n \"\"\"\n return self.parse(open(filename, \"r\"))\n\n def parse_stdin(self):\n \"\"\"Parse a TAP stream from standard input.\n\n Note: this has the side effect of closing the standard input\n filehandle after parsing.\n \"\"\"\n return self.parse(sys.stdin)\n\n def parse_text(self, text):\n \"\"\"Parse a string containing one or more lines of TAP output.\"\"\"\n return self.parse(StringIO(text))\n\n def parse(self, fh):\n \"\"\"Generate tap.line.Line objects, given a file-like object `fh`.\n\n `fh` may be any object that implements both the iterator and\n context management protocol (i.e. it can be used in both a\n \"with\" statement and a \"for...in\" statement.)\n\n Trailing whitespace and newline characters will be automatically\n stripped from the input lines.\n \"\"\"\n with fh:\n try:\n first_line = next(fh)\n except StopIteration:\n return\n first_parsed = self.parse_line(first_line.rstrip())\n fh_new = itertools.chain([first_line], fh)\n if first_parsed.category == \"version\" and first_parsed.version >= 13:\n if ENABLE_VERSION_13:\n fh_new = peekable(itertools.chain([first_line], fh))\n else: # pragma no cover\n print(\n \"\"\"\nWARNING: Optional imports not found, TAP 13 output will be\n ignored. To parse yaml, see requirements in docs:\n https://tappy.readthedocs.io/en/latest/consumers.html#tap-version-13\"\"\"\n )\n\n for line in fh_new:\n yield self.parse_line(line.rstrip(), fh_new)\n\n def parse_line(self, text, fh=None):\n \"\"\"Parse a line into whatever TAP category it belongs.\"\"\"\n match = self.ok.match(text)\n if match:\n return self._parse_result(True, match, fh)\n\n match = self.not_ok.match(text)\n if match:\n return self._parse_result(False, match, fh)\n\n if self.diagnostic.match(text):\n return Diagnostic(text)\n\n match = self.plan.match(text)\n if match:\n return self._parse_plan(match)\n\n match = self.bail.match(text)\n if match:\n return Bail(match.group(\"reason\"))\n\n match = self.version.match(text)\n if match:\n return self._parse_version(match)\n\n return Unknown()\n\n def _parse_plan(self, match):\n \"\"\"Parse a matching plan line.\"\"\"\n expected_tests = int(match.group(\"expected\"))\n directive = Directive(match.group(\"directive\"))\n\n # Only SKIP directives are allowed in the plan.\n if directive.text and not directive.skip:\n return Unknown()\n\n return Plan(expected_tests, directive)",
"start_line": 1,
"end_line": 150,
"total_lines": 199,
"is_truncated": true
}Turn 11at 403 s1,025 tokens out12,123 prompt tokens
Okay, `parse` method:
```python
def parse(self, fh):
# ...
with fh:
# ...
if first_parsed.category == "version" and first_parsed.version >= 13:
if ENABLE_VERSION_13:
fh_new = peekable(itertools.chain([first_line], fh))
# ...
for line in fh_new:
yield self.parse_line(line.rstrip(), fh_new)
```
It use `more_itertools.peekable` to wrap the iterator, which is why `fh_new.peek()` works.
Also, very importantly, look at:
`yield self.parse_line(line.rstrip(), fh_new)`
The lines passed to `parse_line` are already `rstrip()`ed!
But wait, `_extract_yaml_block` takes `fh_new` (as `fh`) and calls `next(fh)` on it.
`next(fh)` on the `peekable` iterator will yield the original lines from the original `fh` (from `StringIO` or `open()`), which *do* have newlines.
So my analysis remains correct: `next(fh)` in `_extract_yaml_block` returns lines with trailing newlines.
Wait, if `line.rstrip()` is used in the main loop, then the lines are stripped there. But `_extract_yaml_block` consumes lines directly from `fh` using `next(fh)`, bypassing the `.rstrip()` in the `for line in fh_new` loop.
Yes, so `"".join(raw_yaml)` should be the correct fix.
Wait, I should check if there's any reason why `"\n".join(raw_yaml)` was used.
If the original lines didn't have newlines, `"".join` would be wrong. But `next(fh)` on a file-like object always includes the newline.
Let's test this hypothesis with the original reproduction script and the fix.
Wait, instead of writing a complex reproduction script, I can just use the one provided in the issue, but replace `_extract_yaml_block` implementation on the fly or just edit the file and run it.
Let's just edit the file and run the reproduction script.
Wait, I should check if there are any other places where `_extract_yaml_block` is called or similar logic is used.
Only one call in `tap/parser.py`.
Let's apply the fix.
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "".join(raw_yaml)
```
Wait, let me double check if `"".join(raw_yaml)` is correct if the last line doesn't have a newline.
If the YAML block is at the end of the file, the last line might not have a newline.
Example:
` field: value` (end of file)
`raw_yaml` will be `["field: value"]`.
`"".join(raw_yaml)` is `"field: value"`. Correct.
If it had a newline:
` field: value\n`
`raw_yaml` will be `["field: value\n"]`.
`"".join(raw_yaml)` is `"field: value\n"`. Correct.
If I used `"\n".join(raw_yaml)`, I would get:
`["field: value\n"]` -> `"field: value\n"` (no extra newline because only one element)
But `["line1\n", "line2\n"]` -> `"line1\n\nline2\n"`.
So `"".join(raw_yaml)` is definitely the way to go.
Let's apply the fix.
TOOL CALL · edit_file
{
"filepath": "tap/parser.py",
"new_string": " return \"\".join(raw_yaml)",
"old_string": " return \"\\n\".join(raw_yaml)"
}Result of edit_file 430 characters
{
"status": "ok",
"filepath": "tap/parser.py",
"occurrences": 1,
"strategy": "exact",
"diff": "--- a/tap/parser.py\n+++ b/tap/parser.py\n@@ -188,7 +188,7 @@\n break\n except StopIteration:\n pass\n- return \"\\n\".join(raw_yaml)\n+ return \"\".join(raw_yaml)\n \n def _parse_version(self, match):\n version = int(match.group(\"version\"))\n",
"is_truncated": false
}Turn 12at 410 s166 tokens out13,310 prompt tokens
Now let's run the reproduction script to verify.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport tap.parser\n\ntap_input = \"\"\"TAP version 13\n1..2\nok 1 A passing test\n ---\n message: test\n severity: fail\n output: |+\n this is a multiline\n string but with tap\n somehow blank lines\n are added to it.\n\"\"\"\nparser = tap.parser.Parser()\n\nfor i, l in enumerate(parser.parse_text(tap_input)):\n if i == 2:\n print(\"{!r}\".format(l.yaml_block[\"output\"].splitlines()))\nPY\n"
}Result of run_command 151 characters
{
"status": "ok",
"stdout": "['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']\n",
"stderr": "",
"exit_code": 0
}Turn 13at 414 s59 tokens out13,542 prompt tokens
Great! The reproduction script now produces the expected output. Now I should check if any existing tests are broken.
TOOL CALL · run_command
{
"command": "pytest tap/tests/test_parser.py -q --tb=short --no-header"
}Result of run_command 161 characters
{
"status": "ok",
"stdout": "........................... [100%]\n27 passed in 0.08s\n",
"stderr": "",
"exit_code": 0
}Turn 14at 420 s85 tokens out13,662 prompt tokens
All tests in `test_parser.py` passed. Let's check if there are any other tests that might be affected. `tap/tests/test_line.py` might test `Result.yaml_block`.
TOOL CALL · run_command
{
"command": "pytest tap/tests/test_line.py -q --tb=short --no-header"
}Result of run_command 160 characters
{
"status": "ok",
"stdout": "....... [100%]\n7 passed in 0.02s\n",
"stderr": "",
"exit_code": 0
}Turn 15at 427 s75 tokens out13,807 prompt tokens
Everything seems fine. I'll do one last check to see if there are any other similar `_extract_yaml_block` style functions. I already did a `grep` for `_extract_yaml_block` and only found one.
TOOL CALL · run_command
{
"command": "git status --short && git diff"
}Result of run_command 523 characters
{
"status": "ok",
"stdout": " M tap/parser.py\ndiff --git a/tap/parser.py b/tap/parser.py\nindex 637436b..2590201 100644\n--- a/tap/parser.py\n+++ b/tap/parser.py\n@@ -188,7 +188,7 @@ WARNING: Optional imports not found, TAP 13 output will be\n break\n except StopIteration:\n pass\n- return \"\\n\".join(raw_yaml)\n+ return \"\".join(raw_yaml)\n \n def _parse_version(self, match):\n version = int(match.group(\"version\"))\n",
"stderr": "",
"exit_code": 0
}Turn 16at 449 s361 tokens out14,093 prompt tokens
The diff is minimal and correct.
Final check on the `_extract_yaml_block` logic to ensure I didn't miss anything.
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "".join(raw_yaml)
```
Wait, if the YAML block is ended by `...`, `next(fh)` is called to consume the `...` line.
The `raw_yaml` will contain subsequent lines that match the indentation.
One thing to consider: what if the YAML block is not ended by `...` but by a line that doesn't have the indentation?
The `while indent_match.match(fh.peek()):` loop will stop, and the `fh.peek()` line will still be there for the main loop in `parse` to process. This is correct.
The `...` terminator is optional in TAP 13. If it is present, the current code consumes it with `next(fh)`. This is correct.
Everything looks solid.
TOOL CALL · submit_patch
Result of submit_patch 55 characters
{
"status": "ok",
"patch_size": 425,
"files_changed": 1
}Model calls (not matched to turns)
Generated tokens 532 tokens · stopped: STOP
The user is reporting a bug in `tap/parser.py` where `_extract_yaml_block()` is adding extra newlines to YAML blocks for multi-line strings.
The provided example:
```python
tap_input = """TAP version 13
1..2
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
"""
parser = tap.parser.Parser()
for i, l in enumerate(parser.parse_text(tap_input)):
if i == 2:
print("{!r}".format(l.yaml_block["output"].splitlines()))
```
Output is: `['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
Expected: `['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
The root cause seems to be that `_extract_yaml_block()` joins lines with `"\n"` but the lines themselves already contain newline characters from the input.
Plan:
1. Create a reproduction script based on the provided example.
2. Locate `_extract_yaml_block` in `tap/parser.py`.
3. Read the code around `_extract_yaml_block`.
4. Fix the bug by stripping newlines from lines before joining them, or using a better way to reconstruct the YAML block.
5. Verify the fix.
Let's start by reproducing the bug.<|channel>thought
The user is reporting a bug in `tap/parser.py` where `_extract_yaml_block()` is adding extra newlines to YAML blocks for multi-line strings.
The provided example:
```python
tap_input = """TAP version 13
1..2
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
"""
parser = tap.parser.Parser()
for i, l in enumerate(parser.parse_text(tap_input)):
if i == 2:
print("{!r}".format(l.yaml_block["output"].splitlines()))
```
Output is: `['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
Expected: `['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
The root cause seems to be that `_extract_yaml_block()` joins lines with `"\n"` but the lines themselves already contain newline characters from the input.
Plan:
1. Create a reproduction script based on the provided example.
2. Locate `_extract_yaml_block` in `tap/parser.py`.
3. Read the code around `_extract_yaml_block`.
4. Fix the bug by stripping newlines from lines before joining them, or using a better way to reconstruct the YAML block.
5. Verify the fix.
Let's start by reproducing the bug.<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import tap.parser
tap_input = """TAP version 13
1..2
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
"""
parser = tap.parser.Parser()
for i, l in enumerate(parser.parse_text(tap_input)):
if i == 2:
print("{!r}".format(l.yaml_block["output"].splitlines()))
PY
<|"|>}<tool_call|><|tool_response>
Generated tokens 61 tokens · stopped: STOP
The reproduction confirms the bug. Now let's find `_extract_yaml_block` in `tap/parser.py`.
The reproduction confirms the bug.
Now let's find `_extract_yaml_block` in `tap/parser.py`.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "def _extract_yaml_block" tap/parser.py<|"|>}<tool_call|><|tool_response>
Generated tokens 55 tokens · stopped: STOP
Let's read `tap/parser.py` around line 177.
Let's read `tap/parser.py` around line 177.
<channel|><|tool_call>call:read_file{end_line:210,filepath:<|"|>tap/parser.py<|"|>,start_line:170}<tool_call|><|tool_response>
Generated tokens 414 tokens · stopped: STOP
The issue is indeed here:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
```
The `next(fh)` call (when `fh` is presumably a file or an iterator of lines) usually includes the newline character at the end of the line. Then `"\n".join(raw_yaml)` adds another newline.
Wait, if `fh` is a file object, `next(fh)` returns the line including the newline.
The `replace(indent, "", 1)` only removes the leading indent.
If `raw_yaml` contains lines like `["line1\n", "line2\n"]`, then `"\n".join(raw_yaml)` produces `"line1\n\nline2\n"`. This explain the extra newlines.
I should strip the trailing newline from each line before adding it to `raw_yaml`, or maybe just use `rstrip('\n')` (or `rstrip('\r\n')`).
Wait, the TAP specification for YAML blocks: they are indented.
Let's check how `fh` is passed to `_extract_yaml_block`.
The issue is indeed here:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
```
The `next(fh)` call (when `fh` is presumably a file or an iterator of lines) usually includes the newline character at the end of the line. Then `"\n".join(raw_yaml)` adds another newline.
Wait, if `fh` is a file object, `next(fh)` returns the line including the newline.
The `replace(indent, "", 1)` only removes the leading indent.
If `raw_yaml` contains lines like `["line1\n", "line2\n"]`, then `"\n".join(raw_yaml)` produces `"line1\n\nline2\n"`. This explain the extra newlines.
I should strip the trailing newline from each line before adding it to `raw_yaml`, or maybe just use `rstrip('\n')` (or `rstrip('\r\n')`).
Wait, the TAP specification for YAML blocks: they are indented.
Let's check how `fh` is passed to `_extract_yaml_block`.
<channel|><|tool_call>call:grep -rn "self._extract_yaml_block" tap/parser.py<|"|>}<tool_call|><|tool_response>
Generated tokens 35 tokens · stopped: STOP
<|channel>thought
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "self._extract_yaml_block" tap/parser.py<|"|>}<tool_call|><|tool_response>
Generated tokens 2,428 tokens · stopped: STOP
The `_extract_yaml_block` function reads lines from the file handler `fh`, strips the leading indentation, and then joins them with `\n`.
The problem is that `next(fh)` returns lines that *already* contain the newline character `\n` at the end (assuming `fh` is a standard file-like object or `io.StringIO` which is likely the case when `parse_text` is called).
When `"\n".join(raw_yaml)` is called, it inserts an additional newline between each line that already has a newline.
Example:
`raw_yaml` contains `['line1\n', 'line2\n', 'line3\n']`
`"\n".join(raw_yaml)` becomes `'line1\n\nline2\n\nline3\n'`
This explains the "additional newlines" described in the issue.
Wait, let's look at `_extract_yaml_block` again:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
```
If `fh` contains lines with trailing newlines, `next(fh)` returns them.
`raw_yaml.append(next(fh).replace(indent, "", 1))` adds the line with the newline.
Then `"\n".join(raw_yaml)` adds *another* newline.
The fix should be to strip the trailing newline from each line before appending it to `raw_yaml`, OR just use `"".join(raw_yaml)` if we want to keep the original newlines. However, `rstrip('\n')` or `rstrip('\r\n')` is safer if we want to control the joining character.
In Python, `line.rstrip('\n')` removes the trailing newline. If we do that, then `"\n".join(raw_yaml)` will be correct.
Actually, if the lines already have newlines, we can just use `"".join(raw_yaml)` but we might need to handle the last line if it doesn't have one.
Wait, if I use `rstrip('\n')`, it might strip other characters if I use `rstrip()`. `rstrip('\n')` only strips newlines. But what about `\r\n`?
Let's see how `next(fh)` behaves. Usually, it's opened in universal newlines mode.
Let's verify the current behavior with a small script to see exactly what's in `raw_yaml`.
Actually, looking at the reported output:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
This is the result of `l.yaml_block["output"].splitlines()`.
If the original string was `"this is a multiline\nstring but with tap\n..."` then `splitlines()` would give `['this is a multiline', 'string but with tap', ...]`.
The fact that there are empty strings `''` in between means there were double newlines `\n\n`.
If `raw_yaml` was `[' this is a multiline\n', ' string but with tap\n', ...]`
And `replace(indent, "", 1)` was called, we get `['this is a multiline\n', 'string but with tap\n', ...]`
Then `"\n".join(...)` results in `'this is a multiline\n\nstring but with tap\n\n...'`
Yes, that's exactly what's happening.
The fix is to remove the trailing newline from the line before adding it to `raw_yaml`.
Or better, since we are joining with `\n`, we should ensure each line does not have a trailing newline.
However, `rstrip('\n')` might be too aggressive if the YAML value itself ends with spaces that should be preserved (though unlikely for the line endings in this context). `rstrip('\r\n')` or `rstrip('\n')` is better.
Actually, Python's `splitlines()` is often used.
Another way is to use `"".join(raw_yaml)` instead of `"\n".join(raw_yaml)`. But wait, if the last line of the YAML block didn't have a newline (e.g. end of file), `"".join` would be fine. If we use `"\n".join`, we might add a trailing newline that wasn't there.
Actually, looking at `_extract_yaml_block`, it reads lines from `fh`.
If we use `.rstrip('\n')` on each line:
`raw_yaml.append(next(fh).rstrip('\n').replace(indent, "", 1))`
Wait, the `replace(indent, "", 1)` should happen first, then `rstrip('\n')`. Or vice versa.
Actually, the indentation is at the start.
`line = next(fh)` -> `" line content\n"`
`line.replace(indent, "", 1)` -> `"line content\n"`
`line.replace(indent, "", 1).rstrip('\n')` -> `"line content"`
Is it possible that the line is just the indentation and a newline?
`" \n"` -> replace indentation -> `"\n"` -> rstrip -> `""`
Then `"\n".join(["", ""])` -> `"\n"`. Correct.
Let's check if there are other occurrences of this pattern.
Also, I should check if `fh.peek()` is used elsewhere.
`fh` seems to be some kind of iterator that supports `peek()`. Looking at `tap/parser.py`, the `Parser.parse_text` likely uses something that implements `peek()`.
Wait, if I use `rstrip('\n')`, will it remove `\r` on Windows?
In universal newline mode, `\r\n` is converted to `\n`.
Let's try to reproduce and verify the fix.
Reproduction script:
```python
import tap.parser
tap_input = """TAP version 13
1..2
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
"""
parser = tap.parser.Parser()
for i, l in enumerate(parser.parse_text(tap_input)):
if i == 2:
print("{!r}".format(l.yaml_block["output"].splitlines()))
```
Expected: `['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
Actual: `['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
Wait, why the leading empty string `''`?
`output: |+`
` this is a multiline\n`
The first line read by `_extract_yaml_block` is the one after `output: |+`.
Wait, the YAML block starts *after* the line containing `---`? No, the YAML block starts with `---` and ends with the line that doesn't start with the indentation.
Let's trace `_extract_yaml_block` in `tap/parser.py`:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh) # This consumes the line that triggered the YAML block (the one with '---')
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
```
The line with `---` is consumed by `next(fh)`.
Then it enters the loop if the next line starts with `indent`.
In the example:
```
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
1. `ok 1 A passing test` is parsed.
2. ` ---` is encountered. `indent` is likely `" "`.
3. `_extract_yaml_block` is called.
4. `next(fh)` consumes ` ---\n`.
5. Next lines:
` message: test\n` -> matches indent, `raw_yaml.append("message: test\n")`
` severity: fail\n` -> matches indent, `raw_yaml.append("severity: fail\n")`
` output: |+\n` -> matches indent, `raw_yaml.append("output: |+\n")`
` this is a multiline\n` -> matches indent, `raw_yaml.append(" this is a multiline\n")`
...
6. Finally `"\n".join(raw_yaml)` results in:
`"message: test\n\nseverity: fail\n\noutput: |+\n\n this is a multiline\n\n..."`
Wait, this is a YAML block. Tappy's `Parser` just extracts the raw YAML block and then (presumably) passes it to a YAML parser.
Looking at `tap/parser.py`, where is the YAML parsed?
I saw `raw_yaml_block=concat_yaml` in the `Line` (or similar) object.
Let's find where `yaml.safe_load` (or similar) is called.
I'll search for `yaml.` in `tap/parser.py`.The `_extract_yaml_block` function reads lines from the file handler `fh`, strips the leading indentation, and then joins them with `\n`.
The problem is that `next(fh)` returns lines that *already* contain the newline character `\n` at the end (assuming `fh` is a standard file-like object or `io.StringIO` which is likely the case when `parse_text` is called).
When `"\n".join(raw_yaml)` is called, it inserts an additional newline between each line that already has a newline.
Example:
`raw_yaml` contains `['line1\n', 'line2\n', 'line3\n']`
`"\n".join(raw_yaml)` becomes `'line1\n\nline2\n\nline3\n'`
This explains the "additional newlines" described in the issue.
Wait, let's look at `_extract_yaml_block` again:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
```
If `fh` contains lines with trailing newlines, `next(fh)` returns them.
`raw_yaml.append(next(fh).replace(indent, "", 1))` adds the line with the newline.
Then `"\n".join(raw_yaml)` adds *another* newline.
The fix should be to strip the trailing newline from each line before appending it to `raw_yaml`, OR just use `"".join(raw_yaml)` if we want to keep the original newlines. However, `rstrip('\n')` or `rstrip('\r\n')` is safer if we want to control the joining character.
In Python, `line.rstrip('\n')` removes the trailing newline. If we do that, then `"\n".join(raw_yaml)` will be correct.
Actually, if the lines already have newlines, we can just use `"".join(raw_yaml)` but we might need to handle the last line if it doesn't have one.
Wait, if I use `rstrip('\n')`, it might strip other characters if I use `rstrip()`. `rstrip('\n')` only strips newlines. But what about `\r\n`?
Let's see how `next(fh)` behaves. Usually, it's opened in universal newlines mode.
Let's verify the current behavior with a small script to see exactly what's in `raw_yaml`.
Actually, looking at the reported output:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
This is the result of `l.yaml_block["output"].splitlines()`.
If the original string was `"this is a multiline\nstring but with tap\n..."` then `splitlines()` would give `['this is a multiline', 'string but with tap', ...]`.
The fact that there are empty strings `''` in between means there were double newlines `\n\n`.
If `raw_yaml` was `[' this is a multiline\n', ' string but with tap\n', ...]`
And `replace(indent, "", 1)` was called, we get `['this is a multiline\n', 'string but with tap\n', ...]`
Then `"\n".join(...)` results in `'this is a multiline\n\nstring but with tap\n\n...'`
Yes, that's exactly what's happening.
The fix is to remove the trailing newline from the line before adding it to `raw_yaml`.
Or better, since we are joining with `\n`, we should ensure each line does not have a trailing newline.
However, `rstrip('\n')` might be too aggressive if the YAML value itself ends with spaces that should be preserved (though unlikely for the line endings in this context). `rstrip('\r\n')` or `rstrip('\n')` is better.
Actually, Python's `splitlines()` is often used.
Another way is to use `"".join(raw_yaml)` instead of `"\n".join(raw_yaml)`. But wait, if the last line of the YAML block didn't have a newline (e.g. end of file), `"".join` would be fine. If we use `"\n".join`, we might add a trailing newline that wasn't there.
Actually, looking at `_extract_yaml_block`, it reads lines from `fh`.
If we use `.rstrip('\n')` on each line:
`raw_yaml.append(next(fh).rstrip('\n').replace(indent, "", 1))`
Wait, the `replace(indent, "", 1)` should happen first, then `rstrip('\n')`. Or vice versa.
Actually, the indentation is at the start.
`line = next(fh)` -> `" line content\n"`
`line.replace(indent, "", 1)` -> `"line content\n"`
`line.replace(indent, "", 1).rstrip('\n')` -> `"line content"`
Is it possible that the line is just the indentation and a newline?
`" \n"` -> replace indentation -> `"\n"` -> rstrip -> `""`
Then `"\n".join(["", ""])` -> `"\n"`. Correct.
Let's check if there are other occurrences of this pattern.
Also, I should check if `fh.peek()` is used elsewhere.
`fh` seems to be some kind of iterator that supports `peek()`. Looking at `tap/parser.py`, the `Parser.parse_text` likely uses something that implements `peek()`.
Wait, if I use `rstrip('\n')`, will it remove `\r` on Windows?
In universal newline mode, `\r\n` is converted to `\n`.
Let's try to reproduce and verify the fix.
Reproduction script:
```python
import tap.parser
tap_input = """TAP version 13
1..2
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
"""
parser = tap.parser.Parser()
for i, l in enumerate(parser.parse_text(tap_input)):
if i == 2:
print("{!r}".format(l.yaml_block["output"].splitlines()))
```
Expected: `['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
Actual: `['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
Wait, why the leading empty string `''`?
`output: |+`
` this is a multiline\n`
The first line read by `_extract_yaml_block` is the one after `output: |+`.
Wait, the YAML block starts *after* the line containing `---`? No, the YAML block starts with `---` and ends with the line that doesn't start with the indentation.
Let's trace `_extract_yaml_block` in `tap/parser.py`:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh) # This consumes the line that triggered the YAML block (the one with '---')
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
```
The line with `---` is consumed by `next(fh)`.
Then it enters the loop if the next line starts with `indent`.
In the example:
```
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
1. `ok 1 A passing test` is parsed.
2. ` ---` is encountered. `indent` is likely `" "`.
3. `_extract_yaml_block` is called.
4. `next(fh)` consumes ` ---\n`.
5. Next lines:
` message: test\n` -> matches indent, `raw_yaml.append("message: test\n")`
` severity: fail\n` -> matches indent, `raw_yaml.append("severity: fail\n")`
` output: |+\n` -> matches indent, `raw_yaml.append("output: |+\n")`
` this is a multiline\n` -> matches indent, `raw_yaml.append(" this is a multiline\n")`
...
6. Finally `"\n".join(raw_yaml)` results in:
`"message: test\n\nseverity: fail\n\noutput: |+\n\n this is a multiline\n\n..."`
Wait, this is a YAML block. Tappy's `Parser` just extracts the raw YAML block and then (presumably) passes it to a YAML parser.
Looking at `tap/parser.py`, where is the YAML parsed?
I saw `raw_yaml_block=concat_yaml` in the `Line` (or similar) object.
Let's find where `yaml.safe_load` (or similar) is called.
I'll search for `yaml.` in `tap/parser.py`.<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "yaml." tap/parser.py<|"|>}<tool_call|><|tool_response>
Generated tokens 151 tokens · stopped: STOP
Wait, it seems `tap/parser.py` doesn't actually call `yaml.safe_load` inside `Parser`? Or maybe it does. Let me check the `Line` class or wherever the result of `Parser.parse_text` goes. The example says `l.yaml_block["output"]`. This suggests that the result of `parser.parse_text` is an object (likely a `Line` object) that has a `yaml_block` attribute which is already a dictionary (parsed YAML). Let's look at the `Line` class in `tap/line.py`.
Wait, it seems `tap/parser.py` doesn't actually call `yaml.safe_load` inside `Parser`? Or maybe it does. Let me check the `Line` class or wherever the result of `Parser.parse_text` goes.
The example says `l.yaml_block["output"]`. This suggests that the result of `parser.parse_text` is an object (likely a `Line` object) that has a `yaml_block` attribute which is already a dictionary (parsed YAML).
Let's look at the `Line` class in `tap/line.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>tap/line.py<|"|>}<tool_call|><|tool_response>
Generated tokens 1,451 tokens · stopped: STOP
Yes, `Result.yaml_block` property does the lazy loading using `yaml.load(self._yaml_block, Loader=yaml.SafeLoader)`.
And `self._yaml_block` is what was passed as `raw_yaml_block` in `Parser.parse_text`.
So, if `_extract_yaml_block` returns a string with double newlines, `yaml.load` will see those double newlines.
In YAML, a multi-line string starting with `|+` (block scalar) preserves newlines.
Example in the issue:
```yaml
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
If `_extract_yaml_block` produces:
```yaml
message: test\n\nseverity: fail\n\noutput: |+\n\n this is a multiline\n\n string but with tap\n\n somehow blank lines\n\n are added to it.\n
```
(Note: the double `\n` come from `"\n".join(raw_yaml)` where `raw_yaml` entries already ended in `\n`)
Then `yaml.load` parses this.
The `output` field becomes a string starting with `\n` then ` this is a multiline\n\n string but with tap\n\n...`
Wait, YAML block scalar `|+` (or `|`) expects the content to be indented.
If the input to `yaml.load` is:
```
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
Then the value of `output` will be `\nthis is a multiline\n\nstring but with tap\n\n...`
This explains why `splitlines()` produces empty strings.
So the fix is definitely to avoid adding extra newlines in `_extract_yaml_block`.
I should change `"\n".join(raw_yaml)` to something that doesn't add extra newlines if they are already there.
But the safest way to handle potentially mixed line endings and ensure we don't change the content other than the unwanted extra newlines is to strip the trailing newline from each line before joining them with `\n`.
Wait, if I strip the trailing newline from each line, and then join with `\n`, I'm effectively normalizing line endings to `\n`.
Alternatively, if I just use `"".join(raw_yaml)`, it preserves exactly what was in the file.
Let's check if `raw_yaml` entries always have newlines.
They come from `next(fh)`. If `fh` is a file object, `next(fh)` always returns the line including the newline character unless it's the very last line of the file and it doesn't have one.
If I use `"".join(raw_yaml)`, I preserve the original newlines. This seems more correct and minimal.
Let's verify this with the reproduction script.
Wait, let's check if `indent` removal also leaves trailing spaces.
`raw_yaml.append(next(fh).replace(indent, "", 1))`
If the original line was `" line\n"`, it becomes `"line\n"`.
If I use `"".join(raw_yaml)`, the result is `"line1\nline2\nline3\n"`.
If I use `"\n".join(raw_yaml)` where `raw_yaml` is `["line1\n", "line2\n", "line3\n"]`, I get `"line1\n\nline2\n\nline3\n"`.
So `"".join(raw_yaml)` is the fix.
Let's double check if `_extract_yaml_block` could be called with something that doesn't have newlines.
`Parser.parse_text` implementation:
```python
def parse_text(self, text):
"""Parse a string of TAP text"""
import io
return self.parse(io.StringIO(text))
```
And `parse` probably calls `_extract_yaml_block` passing the `io.StringIO` object.
`io.StringIO` lines always end with `\n` since the input `text` likely contains them.
Let's test `"".join(raw_yaml)` with the reproduction script.
Yes, `Result.yaml_block` property does the lazy loading using `yaml.load(self._yaml_block, Loader=yaml.SafeLoader)`.
And `self._yaml_block` is what was passed as `raw_yaml_block` in `Parser.parse_text`.
So, if `_extract_yaml_block` returns a string with double newlines, `yaml.load` will see those double newlines.
In YAML, a multi-line string starting with `|+` (block scalar) preserves newlines.
Example in the issue:
```yaml
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
If `_extract_yaml_block` produces:
```yaml
message: test\n\nseverity: fail\n\noutput: |+\n\n this is a multiline\n\n string but with tap\n\n somehow blank lines\n\n are added to it.\n
```
(Note: the double `\n` come from `"\n".join(raw_yaml)` where `raw_yaml` entries already ended in `\n`)
Then `yaml.load` parses this.
The `output` field becomes a string starting with `\n` then ` this is a multiline\n\n string but with tap\n\n...`
Wait, YAML block scalar `|+` (or `|`) expects the content to be indented.
If the input to `yaml.load` is:
```
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
Then the value of `output` will be `\nthis is a multiline\n\nstring but with tap\n\n...`
This explains why `splitlines()` produces empty strings.
So the fix is definitely to avoid adding extra newlines in `_extract_yaml_block`.
I should change `"\n".join(raw_yaml)` to something that doesn't add extra newlines if they are already there.
But the safest way to handle potentially mixed line endings and ensure we don't change the content other than the unwanted extra newlines is to strip the trailing newline from each line before joining them with `\n`.
Wait, if I strip the trailing newline from each line, and then join with `\n`, I'm effectively normalizing line endings to `\n`.
Alternatively, if I just use `"".join(raw_yaml)`, it preserves exactly what was in the file.
Let's check if `raw_yaml` entries always have newlines.
They come from `next(fh)`. If `fh` is a file object, `next(fh)` always returns the line including the newline character unless it's the very last line of the file and it doesn't have one.
If I use `"".join(raw_yaml)`, I preserve the original newlines. This seems more correct and minimal.
Let's verify this with the reproduction script.
Wait, let's check if `indent` removal also leaves trailing spaces.
`raw_yaml.append(next(fh).replace(indent, "", 1))`
If the original line was `" line\n"`, it becomes `"line\n"`.
If I use `"".join(raw_yaml)`, the result is `"line1\nline2\nline3\n"`.
If I use `"\n".join(raw_yaml)` where `raw_yaml` is `["line1\n", "line2\n", "line3\n"]`, I get `"line1\n\nline2\n\nline3\n"`.
So `"".join(raw_yaml)` is the fix.
Let's double check if `_extract_yaml_block` could be called with something that doesn't have newlines.
`Parser.parse_text` implementation:
```python
def parse_text(self, text):
"""Parse a string of TAP text"""
import io
return self.parse(io.StringIO(text))
```
And `parse` probably calls `_extract_yaml_block` passing the `io.StringIO` object.
`io.StringIO` lines always end with `\n` since the input `text` likely contains them.
Let's test `"".join(raw_yaml)` with the reproduction script.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import tap.parser
import io
def _extract_yaml_block_original(self, indent, fh):
raw_yaml = []
import re
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
if False: # simplified for test
next(fh)
break
except StopIteration:
pass
return "\n".join(raw_yaml)
def _extract_yaml_block_fixed(self, indent, fh):
raw_yaml = []
import re
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
if False: # simplified for test
next(fh)
break
except StopIteration:
pass
return "".join(raw_yaml)
# Mock Parser object
class MockParser:
def __init__(self):
import re
self.yaml_block_end = re.compile(r"^\\s+\\.\\.\\.")
indent = " "
text = " ---\n message: test\n severity: fail\n output: |+\n this is a multiline\n string but with tap\n somehow blank lines\n are added to it.\n"
fh = io.StringIO(text)
print("Original:", repr(_extract_yaml_block_original(None, indent, fh)))
fh.seek(0)
print("Fixed:", repr(_extract_yaml_block_fixed(None, indent, fh)))
PY
<|"|>}<tool_call|><|tool_response>
Generated tokens 103 tokens · stopped: STOP
Ah, `io.StringIO` doesn't have `peek()`. Tappy must be using a custom wrapper for the file handler. Let's check `tap/parser.py` again to see how it's used. I'll look for the `parse` method in `tap/parser.py`.
Ah, `io.StringIO` doesn't have `peek()`. Tappy must be using a custom wrapper for the file handler.
Let's check `tap/parser.py` again to see how it's used.
I'll look for the `parse` method in `tap/parser.py`.
<channel|><|tool_call>call:read_file{end_line:160,filepath:<|"|>tap/parser.py<|"|>,start_line:1}<tool_call|><|tool_response>
Generated tokens 1,025 tokens · stopped: STOP
Okay, `parse` method:
```python
def parse(self, fh):
# ...
with fh:
# ...
if first_parsed.category == "version" and first_parsed.version >= 13:
if ENABLE_VERSION_13:
fh_new = peekable(itertools.chain([first_line], fh))
# ...
for line in fh_new:
yield self.parse_line(line.rstrip(), fh_new)
```
It use `more_itertools.peekable` to wrap the iterator, which is why `fh_new.peek()` works.
Also, very importantly, look at:
`yield self.parse_line(line.rstrip(), fh_new)`
The lines passed to `parse_line` are already `rstrip()`ed!
But wait, `_extract_yaml_block` takes `fh_new` (as `fh`) and calls `next(fh)` on it.
`next(fh)` on the `peekable` iterator will yield the original lines from the original `fh` (from `StringIO` or `open()`), which *do* have newlines.
So my analysis remains correct: `next(fh)` in `_extract_yaml_block` returns lines with trailing newlines.
Wait, if `line.rstrip()` is used in the main loop, then the lines are stripped there. But `_extract_yaml_block` consumes lines directly from `fh` using `next(fh)`, bypassing the `.rstrip()` in the `for line in fh_new` loop.
Yes, so `"".join(raw_yaml)` should be the correct fix.
Wait, I should check if there's any reason why `"\n".join(raw_yaml)` was used.
If the original lines didn't have newlines, `"".join` would be wrong. But `next(fh)` on a file-like object always includes the newline.
Let's test this hypothesis with the original reproduction script and the fix.
Wait, instead of writing a complex reproduction script, I can just use the one provided in the issue, but replace `_extract_yaml_block` implementation on the fly or just edit the file and run it.
Let's just edit the file and run the reproduction script.
Wait, I should check if there are any other places where `_extract_yaml_block` is called or similar logic is used.
Only one call in `tap/parser.py`.
Let's apply the fix.
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "".join(raw_yaml)
```
Wait, let me double check if `"".join(raw_yaml)` is correct if the last line doesn't have a newline.
If the YAML block is at the end of the file, the last line might not have a newline.
Example:
` field: value` (end of file)
`raw_yaml` will be `["field: value"]`.
`"".join(raw_yaml)` is `"field: value"`. Correct.
If it had a newline:
` field: value\n`
`raw_yaml` will be `["field: value\n"]`.
`"".join(raw_yaml)` is `"field: value\n"`. Correct.
If I used `"\n".join(raw_yaml)`, I would get:
`["field: value\n"]` -> `"field: value\n"` (no extra newline because only one element)
But `["line1\n", "line2\n"]` -> `"line1\n\nline2\n"`.
So `"".join(raw_yaml)` is definitely the way to go.
Let's apply the fix.Okay, `parse` method:
```python
def parse(self, fh):
# ...
with fh:
# ...
if first_parsed.category == "version" and first_parsed.version >= 13:
if ENABLE_VERSION_13:
fh_new = peekable(itertools.chain([first_line], fh))
# ...
for line in fh_new:
yield self.parse_line(line.rstrip(), fh_new)
```
It use `more_itertools.peekable` to wrap the iterator, which is why `fh_new.peek()` works.
Also, very importantly, look at:
`yield self.parse_line(line.rstrip(), fh_new)`
The lines passed to `parse_line` are already `rstrip()`ed!
But wait, `_extract_yaml_block` takes `fh_new` (as `fh`) and calls `next(fh)` on it.
`next(fh)` on the `peekable` iterator will yield the original lines from the original `fh` (from `StringIO` or `open()`), which *do* have newlines.
So my analysis remains correct: `next(fh)` in `_extract_yaml_block` returns lines with trailing newlines.
Wait, if `line.rstrip()` is used in the main loop, then the lines are stripped there. But `_extract_yaml_block` consumes lines directly from `fh` using `next(fh)`, bypassing the `.rstrip()` in the `for line in fh_new` loop.
Yes, so `"".join(raw_yaml)` should be the correct fix.
Wait, I should check if there's any reason why `"\n".join(raw_yaml)` was used.
If the original lines didn't have newlines, `"".join` would be wrong. But `next(fh)` on a file-like object always includes the newline.
Let's test this hypothesis with the original reproduction script and the fix.
Wait, instead of writing a complex reproduction script, I can just use the one provided in the issue, but replace `_extract_yaml_block` implementation on the fly or just edit the file and run it.
Let's just edit the file and run the reproduction script.
Wait, I should check if there are any other places where `_extract_yaml_block` is called or similar logic is used.
Only one call in `tap/parser.py`.
Let's apply the fix.
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "".join(raw_yaml)
```
Wait, let me double check if `"".join(raw_yaml)` is correct if the last line doesn't have a newline.
If the YAML block is at the end of the file, the last line might not have a newline.
Example:
` field: value` (end of file)
`raw_yaml` will be `["field: value"]`.
`"".join(raw_yaml)` is `"field: value"`. Correct.
If it had a newline:
` field: value\n`
`raw_yaml` will be `["field: value\n"]`.
`"".join(raw_yaml)` is `"field: value\n"`. Correct.
If I used `"\n".join(raw_yaml)`, I would get:
`["field: value\n"]` -> `"field: value\n"` (no extra newline because only one element)
But `["line1\n", "line2\n"]` -> `"line1\n\nline2\n"`.
So `"".join(raw_yaml)` is definitely the way to go.
Let's apply the fix.<channel|><|tool_call>call:edit_file{filepath:<|"|>tap/parser.py<|"|>,new_string:<|"|> return "".join(raw_yaml)<|"|>,old_string:<|"|> return "\n".join(raw_yaml)<|"|>}<tool_call|><|tool_response>
Generated tokens 166 tokens · stopped: STOP
Now let's run the reproduction script to verify.
Now let's run the reproduction script to verify.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import tap.parser
tap_input = """TAP version 13
1..2
ok 1 A passing test
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
"""
parser = tap.parser.Parser()
for i, l in enumerate(parser.parse_text(tap_input)):
if i == 2:
print("{!r}".format(l.yaml_block["output"].splitlines()))
PY
<|"|>}<tool_call|><|tool_response>
Generated tokens 59 tokens · stopped: STOP
Great! The reproduction script now produces the expected output. Now I should check if any existing tests are broken.
Great! The reproduction script now produces the expected output.
Now I should check if any existing tests are broken.
<channel|><|tool_call>call:run_command{command:<|"|>pytest tap/tests/test_parser.py -q --tb=short --no-header<|"|>}<tool_call|><|tool_response>
Generated tokens 85 tokens · stopped: STOP
All tests in `test_parser.py` passed. Let's check if there are any other tests that might be affected. `tap/tests/test_line.py` might test `Result.yaml_block`.
All tests in `test_parser.py` passed.
Let's check if there are any other tests that might be affected.
`tap/tests/test_line.py` might test `Result.yaml_block`.
<channel|><|tool_call>call:run_command{command:<|"|>pytest tap/tests/test_line.py -q --tb=short --no-header<|"|>}<tool_call|><|tool_response>
Generated tokens 75 tokens · stopped: STOP
Everything seems fine. I'll do one last check to see if there are any other similar `_extract_yaml_block` style functions. I already did a `grep` for `_extract_yaml_block` and only found one.
Everything seems fine.
I'll do one last check to see if there are any other similar `_extract_yaml_block` style functions.
I already did a `grep` for `_extract_yaml_block` and only found one.<channel|><|tool_call>call:run_command{command:<|"|>git status --short && git diff<|"|>}<tool_call|><|tool_response>
Generated tokens 361 tokens · stopped: STOP
The diff is minimal and correct.
Final check on the `_extract_yaml_block` logic to ensure I didn't miss anything.
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "".join(raw_yaml)
```
Wait, if the YAML block is ended by `...`, `next(fh)` is called to consume the `...` line.
The `raw_yaml` will contain subsequent lines that match the indentation.
One thing to consider: what if the YAML block is not ended by `...` but by a line that doesn't have the indentation?
The `while indent_match.match(fh.peek()):` loop will stop, and the `fh.peek()` line will still be there for the main loop in `parse` to process. This is correct.
The `...` terminator is optional in TAP 13. If it is present, the current code consumes it with `next(fh)`. This is correct.
Everything looks solid.
The diff is minimal and correct.
Final check on the `_extract_yaml_block` logic to ensure I didn't miss anything.
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handler"""
raw_yaml = []
indent_match = re.compile(r"^{}".format(indent))
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
break
except StopIteration:
pass
return "".join(raw_yaml)
```
Wait, if the YAML block is ended by `...`, `next(fh)` is called to consume the `...` line.
The `raw_yaml` will contain subsequent lines that match the indentation.
One thing to consider: what if the YAML block is not ended by `...` but by a line that doesn't have the indentation?
The `while indent_match.match(fh.peek()):` loop will stop, and the `fh.peek()` line will still be there for the main loop in `parse` to process. This is correct.
The `...` terminator is optional in TAP 13. If it is present, the current code consumes it with `next(fh)`. This is correct.
Everything looks solid.
<channel|><|tool_call>call:submit_patch{}<tool_call|><|tool_response>
Patch, tests and logs
Final code change Included
diff --git a/tap/parser.py b/tap/parser.py
index 637436b..2590201 100644
--- a/tap/parser.py
+++ b/tap/parser.py
@@ -188,7 +188,7 @@ WARNING: Optional imports not found, TAP 13 output will be
break
except StopIteration:
pass
- return "\n".join(raw_yaml)
+ return "".join(raw_yaml)
def _parse_version(self, match):
version = int(match.group("version"))
Test output Included
============================= test session starts ============================== collected 114 items tap/tests/test_adapter.py ..... [ 4%] tap/tests/test_directive.py ...... [ 9%] tap/tests/test_formatter.py .. [ 11%] tap/tests/test_line.py ....... [ 17%] tap/tests/test_loader.py ....... [ 23%] tap/tests/test_main.py ...... [ 28%] tap/tests/test_parser.py ........................... [ 52%] tap/tests/test_result.py ......... [ 60%] tap/tests/test_rules.py ........ [ 67%] tap/tests/test_runner.py ........ [ 74%] tap/tests/test_tracker.py ............................. [100%] ==================================== PASSES ==================================== - generated xml file: /tmp/rebench-grade-94e67d07b45b4957a0d04ab731031b7f.xml -- =========================== short test summary info ============================ PASSED tap/tests/test_adapter.py::TestAdapter::test_adapter_has_filename PASSED tap/tests/test_adapter.py::TestAdapter::test_handles_not_ok_todo_test_line PASSED tap/tests/test_adapter.py::TestAdapter::test_handles_ok_test_line PASSED tap/tests/test_adapter.py::TestAdapter::test_handles_ok_todo_test_line PASSED tap/tests/test_adapter.py::TestAdapter::test_handles_skip_test_line PASSED tap/tests/test_directive.py::TestDirective::test_finds_simplest_skip PASSED tap/tests/test_directive.py::TestDirective::test_finds_simplest_todo PASSED tap/tests/test_directive.py::TestDirective::test_finds_skip PASSED tap/tests/test_directive.py::TestDirective::test_finds_todo PASSED tap/tests/test_directive.py::TestDirective::test_skip_at_beginning PASSED tap/tests/test_directive.py::TestDirective::test_todo_has_boundary PASSED tap/tests/test_formatter.py::TestFormatter::test_format_exception_as_diagnostics PASSED tap/tests/test_formatter.py::TestFormatter::test_formats_as_diagnostics PASSED tap/tests/test_line.py::TestLine::test_line_requires_category PASSED tap/tests/test_line.py::TestResult::test_category PASSED tap/tests/test_line.py::TestResult::test_ok PASSED tap/tests/test_line.py::TestResult::test_str_diagnostics PASSED tap/tests/test_line.py::TestResult::test_str_directive PASSED tap/tests/test_line.py::TestResult::test_str_not_ok PASSED tap/tests/test_line.py::TestResult::test_str_ok PASSED tap/tests/test_loader.py::TestLoader::test_errors_with_multiple_version_lines PASSED tap/tests/test_loader.py::TestLoader::test_errors_with_version_not_on_first_line PASSED tap/tests/test_loader.py::TestLoader::test_file_does_not_exist PASSED tap/tests/test_loader.py::TestLoader::test_handles_directory PASSED tap/tests/test_loader.py::TestLoader::test_handles_file PASSED tap/tests/test_loader.py::TestLoader::test_loads_from_stream PASSED tap/tests/test_loader.py::TestLoader::test_skip_plan_aborts_loading PASSED tap/tests/test_main.py::TestMain::test_build_suite_from_stdin PASSED tap/tests/test_main.py::TestMain::test_build_suite_from_stdin_dash PASSED tap/tests/test_main.py::TestMain::test_exits_with_error PASSED tap/tests/test_main.py::TestMain::test_get_successful_status PASSED tap/tests/test_main.py::TestMain::test_when_no_pipe_to_stdin PASSED tap/tests/test_main.py::TestMainModule::test_main_set_to_stream PASSED tap/tests/test_parser.py::TestParser::test_after_hash_is_not_description PASSED tap/tests/test_parser.py::TestParser::test_bail_out_line PASSED tap/tests/test_parser.py::TestParser::test_diagnostic_line PASSED tap/tests/test_parser.py::TestParser::test_errors_on_old_version PASSED tap/tests/test_parser.py::TestParser::test_finds_description PASSED tap/tests/test_parser.py::TestParser::test_finds_directive PASSED tap/tests/test_parser.py::TestParser::test_finds_not_ok PASSED tap/tests/test_parser.py::TestParser::test_finds_number PASSED tap/tests/test_parser.py::TestParser::test_finds_ok PASSED tap/tests/test_parser.py::TestParser::test_finds_plan PASSED tap/tests/test_parser.py::TestParser::test_finds_plan_with_skip PASSED tap/tests/test_parser.py::TestParser::test_finds_skip PASSED tap/tests/test_parser.py::TestParser::test_finds_todo PASSED tap/tests/test_parser.py::TestParser::test_finds_version PASSED tap/tests/test_parser.py::TestParser::test_ignores_plan_with_any_non_skip_directive PASSED tap/tests/test_parser.py::TestParser::test_malformed_yaml PASSED tap/tests/test_parser.py::TestParser::test_parse_empty_file PASSED tap/tests/test_parser.py::TestParser::test_parses_file PASSED tap/tests/test_parser.py::TestParser::test_parses_mixed PASSED tap/tests/test_parser.py::TestParser::test_parses_stdin PASSED tap/tests/test_parser.py::TestParser::test_parses_text PASSED tap/tests/test_parser.py::TestParser::test_parses_yaml PASSED tap/tests/test_parser.py::TestParser::test_parses_yaml_more_complex PASSED tap/tests/test_parser.py::TestParser::test_parses_yaml_no_association PASSED tap/tests/test_parser.py::TestParser::test_parses_yaml_no_end PASSED tap/tests/test_parser.py::TestParser::test_parses_yaml_no_start PASSED tap/tests/test_parser.py::TestParser::test_unrecognizable_line PASSED tap/tests/test_result.py::FakeTestCase::runTest PASSED tap/tests/test_result.py::TestTAPTestResult::test_adds_error PASSED tap/tests/test_result.py::TestTAPTestResult::test_adds_expected_failure PASSED tap/tests/test_result.py::TestTAPTestResult::test_adds_failure PASSED tap/tests/test_result.py::TestTAPTestResult::test_adds_skip PASSED tap/tests/test_result.py::TestTAPTestResult::test_adds_subtest_failure PASSED tap/tests/test_result.py::TestTAPTestResult::test_adds_subtest_success PASSED tap/tests/test_result.py::TestTAPTestResult::test_adds_success PASSED tap/tests/test_result.py::TestTAPTestResult::test_adds_unexpected_success PASSED tap/tests/test_rules.py::TestRules::test_errors_on_bail PASSED tap/tests/test_rules.py::TestRules::test_errors_plan_not_at_end PASSED tap/tests/test_rules.py::TestRules::test_errors_when_expected_tests_differs_from_actual PASSED tap/tests/test_rules.py::TestRules::test_handles_skipping_plan PASSED tap/tests/test_rules.py::TestRules::test_only_one_plan PASSED tap/tests/test_rules.py::TestRules::test_plan_line_two PASSED tap/tests/test_rules.py::TestRules::test_requires_plan PASSED tap/tests/test_rules.py::TestRules::test_tracks_plan_line PASSED tap/tests/test_runner.py::TestTAPTestRunner::test_bad_format_string PASSED tap/tests/test_runner.py::TestTAPTestRunner::test_has_tap_test_result PASSED tap/tests/test_runner.py::TestTAPTestRunner::test_runner_sets_tracker_for_streaming PASSED tap/tests/test_runner.py::TestTAPTestRunner::test_runner_stream_to_devnull_for_streaming PASSED tap/tests/test_runner.py::TestTAPTestRunner::test_runner_uses_combined PASSED tap/tests/test_runner.py::TestTAPTestRunner::test_runner_uses_format PASSED tap/tests/test_runner.py::TestTAPTestRunner::test_runner_uses_header PASSED tap/tests/test_runner.py::TestTAPTestRunner::test_runner_uses_outdir PASSED tap/tests/test_tracker.py::TestTracker::test_add_not_ok_writes_to_stream_while_streaming PASSED tap/tests/test_tracker.py::TestTracker::test_add_ok_writes_to_stream_while_streaming PASSED tap/tests/test_tracker.py::TestTracker::test_add_skip_writes_to_stream_while_streaming PASSED tap/tests/test_tracker.py::TestTracker::test_adds_not_ok PASSED tap/tests/test_tracker.py::TestTracker::test_adds_not_ok_with_diagnostics PASSED tap/tests/test_tracker.py::TestTracker::test_adds_ok PASSED tap/tests/test_tracker.py::TestTracker::test_adds_skip PASSED tap/tests/test_tracker.py::TestTracker::test_combined_results_in_one_file_tap_version_12 PASSED tap/tests/test_tracker.py::TestTracker::test_combined_results_in_one_file_tap_version_13 PASSED tap/tests/test_tracker.py::TestTracker::test_does_not_write_header PASSED tap/tests/test_tracker.py::TestTracker::test_generates_tap_reports_in_existing_outdir PASSED tap/tests/test_tracker.py::TestTracker::test_generates_tap_reports_in_new_outdir PASSED tap/tests/test_tracker.py::TestTracker::test_get_default_tap_file_path PASSED tap/tests/test_tracker.py::TestTracker::test_has_test_cases PASSED tap/tests/test_tracker.py::TestTracker::test_header_displayed_by_default PASSED tap/tests/test_tracker.py::TestTracker::test_header_set_by_init PASSED tap/tests/test_tracker.py::TestTracker::test_individual_report_has_no_plan_when_combined PASSED tap/tests/test_tracker.py::TestTracker::test_results_not_combined_by_default PASSED tap/tests/test_tracker.py::TestTracker::test_sanitizes_tap_file_path PASSED tap/tests/test_tracker.py::TestTracker::test_streaming_does_not_write_files PASSED tap/tests/test_tracker.py::TestTracker::test_streaming_writes_plan PASSED tap/tests/test_tracker.py::TestTracker::test_streaming_writes_tap_version_13 PASSED tap/tests/test_tracker.py::TestTracker::test_tracker_does_not_stream_by_default PASSED tap/tests/test_tracker.py::TestTracker::test_tracker_has_stream PASSED tap/tests/test_tracker.py::TestTracker::test_tracks_class PASSED tap/tests/test_tracker.py::TestTracker::test_write_plan_first_combined PASSED tap/tests/test_tracker.py::TestTracker::test_write_plan_first_not_combined PASSED tap/tests/test_tracker.py::TestTracker::test_write_plan_first_streaming PASSED tap/tests/test_tracker.py::TestTracker::test_write_plan_immediate_streaming ============================= 114 passed in 0.31s ==============================
Test errors Included
Test report (JUnit) Included
<?xml version="1.0" encoding="utf-8"?><testsuites><testsuite name="pytest" errors="0" failures="0" skipped="0" tests="114" time="0.308" timestamp="2026-11-14T03:26:40.311289+00:00" hostname="9cadeeca50f6"><testcase classname="tap.tests.test_adapter.TestAdapter" name="test_adapter_has_filename" time="0.001" /><testcase classname="tap.tests.test_adapter.TestAdapter" name="test_handles_not_ok_todo_test_line" time="0.001" /><testcase classname="tap.tests.test_adapter.TestAdapter" name="test_handles_ok_test_line" time="0.001" /><testcase classname="tap.tests.test_adapter.TestAdapter" name="test_handles_ok_todo_test_line" time="0.000" /><testcase classname="tap.tests.test_adapter.TestAdapter" name="test_handles_skip_test_line" time="0.000" /><testcase classname="tap.tests.test_directive.TestDirective" name="test_finds_simplest_skip" time="0.000" /><testcase classname="tap.tests.test_directive.TestDirective" name="test_finds_simplest_todo" time="0.000" /><testcase classname="tap.tests.test_directive.TestDirective" name="test_finds_skip" time="0.000" /><testcase classname="tap.tests.test_directive.TestDirective" name="test_finds_todo" time="0.000" /><testcase classname="tap.tests.test_directive.TestDirective" name="test_skip_at_beginning" time="0.000" /><testcase classname="tap.tests.test_directive.TestDirective" name="test_todo_has_boundary" time="0.000" /><testcase classname="tap.tests.test_formatter.TestFormatter" name="test_format_exception_as_diagnostics" time="0.000" /><testcase classname="tap.tests.test_formatter.TestFormatter" name="test_formats_as_diagnostics" time="0.000" /><testcase classname="tap.tests.test_line.TestLine" name="test_line_requires_category" time="0.000" /><testcase classname="tap.tests.test_line.TestResult" name="test_category" time="0.000" /><testcase classname="tap.tests.test_line.TestResult" name="test_ok" time="0.000" /><testcase classname="tap.tests.test_line.TestResult" name="test_str_diagnostics" time="0.000" /><testcase classname="tap.tests.test_line.TestResult" name="test_str_directive" time="0.000" /><testcase classname="tap.tests.test_line.TestResult" name="test_str_not_ok" time="0.000" /><testcase classname="tap.tests.test_line.TestResult" name="test_str_ok" time="0.000" /><testcase classname="tap.tests.test_loader.TestLoader" name="test_errors_with_multiple_version_lines" time="0.001" /><testcase classname="tap.tests.test_loader.TestLoader" name="test_errors_with_version_not_on_first_line" time="0.000" /><testcase classname="tap.tests.test_loader.TestLoader" name="test_file_does_not_exist" time="0.000" /><testcase classname="tap.tests.test_loader.TestLoader" name="test_handles_directory" time="0.001" /><testcase classname="tap.tests.test_loader.TestLoader" name="test_handles_file" time="0.000" /><testcase classname="tap.tests.test_loader.TestLoader" name="test_loads_from_stream" time="0.000" /><testcase classname="tap.tests.test_loader.TestLoader" name="test_skip_plan_aborts_loading" time="0.000" /><testcase classname="tap.tests.test_main.TestMain" name="test_build_suite_from_stdin" time="0.001" /><testcase classname="tap.tests.test_main.TestMain" name="test_build_suite_from_stdin_dash" time="0.001" /><testcase classname="tap.tests.test_main.TestMain" name="test_exits_with_error" time="0.001" /><testcase classname="tap.tests.test_main.TestMain" name="test_get_successful_status" time="0.000" /><testcase classname="tap.tests.test_main.TestMain" name="test_when_no_pipe_to_stdin" time="0.002" /><testcase classname="tap.tests.test_main.TestMainModule" name="test_main_set_to_stream" time="0.001" /><testcase classname="tap.tests.test_parser.TestParser" name="test_after_hash_is_not_description" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_bail_out_line" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_diagnostic_line" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_errors_on_old_version" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_description" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_directive" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_not_ok" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_number" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_ok" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_plan" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_plan_with_skip" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_skip" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_todo" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_finds_version" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_ignores_plan_with_any_non_skip_directive" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_malformed_yaml" time="0.001" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parse_empty_file" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_file" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_mixed" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_stdin" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_text" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_yaml" time="0.001" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_yaml_more_complex" time="0.002" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_yaml_no_association" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_yaml_no_end" time="0.001" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_yaml_no_start" time="0.000" /><testcase classname="tap.tests.test_parser.TestParser" name="test_unrecognizable_line" time="0.000" /><testcase classname="tap.tests.test_result.FakeTestCase" name="runTest" time="0.000" /><testcase classname="tap.tests.test_result.TestTAPTestResult" name="test_adds_error" time="0.000" /><testcase classname="tap.tests.test_result.TestTAPTestResult" name="test_adds_expected_failure" time="0.000" /><testcase classname="tap.tests.test_result.TestTAPTestResult" name="test_adds_failure" time="0.000" /><testcase classname="tap.tests.test_result.TestTAPTestResult" name="test_adds_skip" time="0.000" /><testcase classname="tap.tests.test_result.TestTAPTestResult" name="test_adds_subtest_failure" time="0.000" /><testcase classname="tap.tests.test_result.TestTAPTestResult" name="test_adds_subtest_success" time="0.000" /><testcase classname="tap.tests.test_result.TestTAPTestResult" name="test_adds_success" time="0.000" /><testcase classname="tap.tests.test_result.TestTAPTestResult" name="test_adds_unexpected_success" time="0.000" /><testcase classname="tap.tests.test_rules.TestRules" name="test_errors_on_bail" time="0.000" /><testcase classname="tap.tests.test_rules.TestRules" name="test_errors_plan_not_at_end" time="0.000" /><testcase classname="tap.tests.test_rules.TestRules" name="test_errors_when_expected_tests_differs_from_actual" time="0.000" /><testcase classname="tap.tests.test_rules.TestRules" name="test_handles_skipping_plan" time="0.000" /><testcase classname="tap.tests.test_rules.TestRules" name="test_only_one_plan" time="0.000" /><testcase classname="tap.tests.test_rules.TestRules" name="test_plan_line_two" time="0.000" /><testcase classname="tap.tests.test_rules.TestRules" name="test_requires_plan" time="0.000" /><testcase classname="tap.tests.test_rules.TestRules" name="test_tracks_plan_line" time="0.000" /><testcase classname="tap.tests.test_runner.TestTAPTestRunner" name="test_bad_format_string" time="0.001" /><testcase classname="tap.tests.test_runner.TestTAPTestRunner" name="test_has_tap_test_result" time="0.000" /><testcase classname="tap.tests.test_runner.TestTAPTestRunner" name="test_runner_sets_tracker_for_streaming" time="0.000" /><testcase classname="tap.tests.test_runner.TestTAPTestRunner" name="test_runner_stream_to_devnull_for_streaming" time="0.000" /><testcase classname="tap.tests.test_runner.TestTAPTestRunner" name="test_runner_uses_combined" time="0.000" /><testcase classname="tap.tests.test_runner.TestTAPTestRunner" name="test_runner_uses_format" time="0.000" /><testcase classname="tap.tests.test_runner.TestTAPTestRunner" name="test_runner_uses_header" time="0.000" /><testcase classname="tap.tests.test_runner.TestTAPTestRunner" name="test_runner_uses_outdir" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_add_not_ok_writes_to_stream_while_streaming" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_add_ok_writes_to_stream_while_streaming" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_add_skip_writes_to_stream_while_streaming" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_adds_not_ok" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_adds_not_ok_with_diagnostics" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_adds_ok" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_adds_skip" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_combined_results_in_one_file_tap_version_12" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_combined_results_in_one_file_tap_version_13" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_does_not_write_header" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_generates_tap_reports_in_existing_outdir" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_generates_tap_reports_in_new_outdir" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_get_default_tap_file_path" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_has_test_cases" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_header_displayed_by_default" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_header_set_by_init" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_individual_report_has_no_plan_when_combined" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_results_not_combined_by_default" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_sanitizes_tap_file_path" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_streaming_does_not_write_files" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_streaming_writes_plan" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_streaming_writes_tap_version_13" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_tracker_does_not_stream_by_default" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_tracker_has_stream" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_tracks_class" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_write_plan_first_combined" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_write_plan_first_not_combined" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_write_plan_first_streaming" time="0.000" /><testcase classname="tap.tests.test_tracker.TestTracker" name="test_write_plan_immediate_streaming" time="0.000" /></testsuite></testsuites>
Agent log Included
[ 0.0s] 📋 System Prompt: You are a principal Python software engineer resolving a repository issue in `/workspace`.
[ 0.0s] 🎯 Task Prompt: You are evaluating a software engineering task for repository python-tap/tappy.
[ 27.0s] 💭 (1283 chars) "The user is reporting a bug in `tap/parser.py` where `_extract_yaml_block()` is adding
extra newlines to YAML blocks for..."
[ 27.0s] 🔧 run_command (21 lines) python3 - <<'PY'
[ 27.1s] → ['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to
it.']
[ 30.8s] 💭 (91 chars) "The reproduction confirms the bug.
Now let's find `_extract_yaml_block` in `tap/parser.py`."
[ 30.8s] 🔧 run_command grep -rn "def _extract_yaml_block" tap/parser.py
[ 30.8s] → 177: def _extract_yaml_block(self, indent, fh):
[ 34.2s] 💭 (43 chars) "Let's read `tap/parser.py` around line 177."
[ 34.2s] 📖 read_file (tap/parser.py)
[ 34.3s] ✓ {'status': 'ok', 'filepath': 'tap/parser.py', 'content': ' ok,\n
number=match.group("number"),\n …
[ 61.2s] 💭 (1389 chars) "The issue is indeed here:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block f..."
[ 61.2s] ✅ Agent finished: <|tool_call>call:grep -rn "self._extract_yaml_block" tap/parser.py<|"|>}<tool_call|>
[ 61.2s] 🎯 Task Prompt: Your previous response reached the token limit before the tool call finished closing
(<|tool_call|> was cut off). Do NOT...
[ 64.0s] 🔧 run_command grep -rn "self._extract_yaml_block" tap/parser.py
[ 64.1s] → 168: concat_yaml = self._extract_yaml_block(indent, fh)
[ 213.0s] 💭 (8022 chars) "The `_extract_yaml_block` function reads lines from the file handler `fh`, strips the
leading indentation, and then join..."
[ 213.0s] 🔧 run_command grep -rn "yaml." tap/parser.py
[ 213.0s] → 14: import yaml # noqa
[ 222.3s] 💭 (450 chars) "Wait, it seems `tap/parser.py` doesn't actually call `yaml.safe_load` inside `Parser`? Or
maybe it does. Let me check th..."
[ 222.3s] 📖 read_file (tap/line.py)
[ 222.3s] ✓ {'status': 'ok', 'filepath': 'tap/line.py', 'content': '# Copyright (c) 2019, Matt Layman and
contributors\ntry:\n im…
[ 323.9s] 💭 (3317 chars) "Yes, `Result.yaml_block` property does the lazy loading using `yaml.load(self._yaml_block,
Loader=yaml.SafeLoader)`.
An..."
[ 323.9s] 🔧 run_command (49 lines) python3 - <<'PY'
[ 324.0s] → error (exit 0):
[ 330.9s] 💭 (208 chars) "Ah, `io.StringIO` doesn't have `peek()`. Tappy must be using a custom wrapper for the file
handler.
Let's check `tap/par..."
[ 330.9s] 📖 read_file (tap/parser.py)
[ 330.9s] ✓ {'status': 'ok', 'filepath': 'tap/parser.py', 'content': '# Copyright (c) 2019, Matt Layman and
contributors\n\nfrom io …
[ 402.1s] 💭 (3319 chars) "Okay, `parse` method:
```python
def parse(self, fh):
# ...
with fh:
# ...
if..."
[ 402.1s] ✏️ edit_file (tap/parser.py)
[ 402.2s] ✓ {'status': 'ok', 'filepath': 'tap/parser.py', 'occurrences': 1, 'strategy': 'exact', 'diff': '---
a/tap/parser.py\n+++ b…
[ 409.1s] 💭 (48 chars) "Now let's run the reproduction script to verify."
[ 409.1s] 🔧 run_command (21 lines) python3 - <<'PY'
[ 409.2s] → ['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']
[ 413.1s] 💭 (118 chars) "Great! The reproduction script now produces the expected output.
Now I should check if any existing tests are broken."
[ 413.1s] 🔧 run_command pytest tap/tests/test_parser.py -q --tb=short --no-header
[ 413.5s] → ........................... [100%]
[ 418.8s] 💭 (160 chars) "All tests in `test_parser.py` passed.
Let's check if there are any other tests that might be affected.
`tap/tests/test_..."
[ 418.8s] 🔧 run_command pytest tap/tests/test_line.py -q --tb=short --no-header
[ 419.0s] → ....... [100%]
[ 425.2s] 💭 (192 chars) "Everything seems fine.
I'll do one last check to see if there are any other similar `_extract_yaml_block` style functio..."
[ 425.2s] 🔧 run_command git status --short && git diff
[ 425.3s] → M tap/parser.py
[ 448.1s] 💭 (1321 chars) "The diff is minimal and correct.
Final check on the `_extract_yaml_block` logic to ensure I didn't miss anything.
```py..."
[ 448.1s] 🤖 submit_patch
[ 448.4s] → submit_patch: {"status": "ok", "patch_size": 425, "files_changed": 1}
Native result row
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"resolved": true,
"status_counts": {
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"instance_id": "python-tap__tappy-112",
"pass_idx": 0,
"patch_chars": 425,
"phase1_seconds": 453.87,
"repo": "python-tap/tappy",
"request_log_path": "/kaggle-root/working/r31/rollouts_X/requests/python-tap__tappy-112__p0__r4.jsonl",
"resolved": true,
"rollout_idx": 4,
"run_key": "python-tap__tappy-112__p0__r4",
"strict_clean_patch": true,
"tool_calls": 13,
"total_llm_calls": 15,
"trace_path": "/kaggle-root/working/r31/rollouts_X/traces/trace_python-tap__tappy-112__p0__r4.json"
}