ROLLOUT 2 · python-tap/tappy
python-tap__tappy-112
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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 33 s569 tokens out3,856 prompt tokens
The user is reporting a bug in `_extract_yaml_block()` in `tap/parser.py`.
When parsing a multi-line string in a YAML block, it seems that `"\n".join(raw_yaml)` is adding extra newlines because the lines in `raw_yaml` already have newline characters at the end.
Example provided:
Input:
```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.
"""
```
Expected output for `l.yaml_block["output"].splitlines()`:
`['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
Actual output:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
Wait, the actual output shows empty strings between the lines.
If `raw_yaml` contains lines like `[' this is a multiline\n', ' string but with tap\n', ...]`
And `"\n".join(raw_yaml)` is used, it becomes:
`' this is a multiline\n\n string but with tap\n\n...'`
Which explains the extra newlines.
I need to check `tap/parser.py` and the `_extract_yaml_block` method.
Plan:
1. Reproduce the bug with a script.
2. Locate `_extract_yaml_block` in `tap/parser.py`.
3. Fix the bug by stripping newlines from each line before joining.
4. Verify the fix.
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
}Generated tokens 569 tokens · stopped: STOP
<|channel>thought
The user is reporting a bug in `_extract_yaml_block()` in `tap/parser.py`.
When parsing a multi-line string in a YAML block, it seems that `"\n".join(raw_yaml)` is adding extra newlines because the lines in `raw_yaml` already have newline characters at the end.
Example provided:
Input:
```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.
"""
```
Expected output for `l.yaml_block["output"].splitlines()`:
`['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
Actual output:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
Wait, the actual output shows empty strings between the lines.
If `raw_yaml` contains lines like `[' this is a multiline\n', ' string but with tap\n', ...]`
And `"\n".join(raw_yaml)` is used, it becomes:
`' this is a multiline\n\n string but with tap\n\n...'`
Which explains the extra newlines.
I need to check `tap/parser.py` and the `_extract_yaml_block` method.
Plan:
1. Reproduce the bug with a script.
2. Locate `_extract_yaml_block` in `tap/parser.py`.
3. Fix the bug by stripping newlines from each line before joining.
4. Verify the fix.<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>
Turn 2at 37 s73 tokens out4,497 prompt tokens
The bug is reproduced. The output contains empty strings, which means extra newlines are present. 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
}Generated tokens 73 tokens · stopped: STOP
The bug is reproduced. The output contains empty strings, which means extra newlines are present.
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>
Turn 3at 42 s57 tokens out4,629 prompt tokens
Let's read the code around line 177 in `tap/parser.py`.
TOOL CALL · read_file
{
"end_line": 200,
"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
}Generated tokens 57 tokens · stopped: STOP
Let's read the code around line 177 in `tap/parser.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>tap/parser.py<|"|>,start_line:170,end_line:200}<tool_call|><|tool_response>
Turn 4at 113 s1,160 tokens out5,074 prompt tokens
The code:
```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)
```
`next(fh)` returns the line including the newline character.
`raw_yaml.append(next(fh).replace(indent, "", 1))` appends the line.
Then `"\n".join(raw_yaml)` adds another newline between lines.
If the lines are:
`" line1\n"`
`" line2\n"`
And $indent$ is `" "`.
`raw_yaml` becomes `['line1\n', 'line2\n']`.
`"\n".join(raw_yaml)` becomes `"line1\n\nline2\n"`.
The fix is to remove the trailing newline from each line before appending, or just join with an empty string if we want to preserve the newlines already present. But usually, when using `"".join(lines)`, we expect the lines to have newlines. If we use `"\n".join(lines)`, we expect the lines NOT to have newlines.
Wait, if I just use `"".join(raw_yaml)`, it should work if `raw_yaml` contains the newlines.
However, `next(fh)` for the last line might not have a newline if it's the end of the file, or the `replace(indent, "", 1)` might behave differently.
Actually, the most robust way is to strip the trailing newline and then join with `\n`.
Wait, if I use `raw_yaml.append(next(fh).rstrip("\n").replace(indent, "", 1))`, that might be problematic if the line has trailing whitespace that should be preserved in YAML. YAML strings can be sensitive to trailing whitespace depending on the block scalar indicator (`|`, `|+`, `|-`).
Actually, if we look at how `next(fh)` works, it typically returns the line ending in `\n`.
If we want to use `"\n".join(raw_yaml)`, we should make sure the elements of `raw_yaml` don't have trailing newlines.
The issue is specifically mentioning `"\n".join(raw_yaml)` without having stripped the newline character.
If I change:
`raw_yaml.append(next(fh).replace(indent, "", 1))`
to:
`raw_yaml.append(next(fh).rstrip("\n").replace(indent, "", 1))`
But wait, if the line is `" line1 \n"`, `rstrip("\n")` will result in `" line1 "`. Then `replace(indent, "", 1)` will result in `"line1 "`. This seems correct.
Actually, if I use `.rstrip('\r\n')` it's safer for cross-platform. But usually `open()` on files in Python handles `\n` universally.
Let's check if there are other places where `_extract_yaml_block` is used or if it's just used here.
It's a helper method of `Parser`.
Wait, if the lines in `raw_yaml` already have newlines, why not just use `"".join(raw_yaml)`?
Because the last line might not have a newline, and `"".join()` wouldn't add one. But `"\n".join()` always adds newlines between elements.
If we have:
`line 1\n`
`line 2\n`
`line 3` (last line, no newline)
`"".join()` -> `line 1\nline 2\nline 3`
`"\n".join()` (after stripping) -> `line 1\nline 2\nline 3`
If we don't strip:
`"\n".join()` -> `line 1\n\nline 2\n\nline 3`
So stripping the trailing newline is correct.
Wait, the `replace(indent, "", 1)` happens after `next(fh)`.
If I do `next(fh).replace(indent, "", 1).rstrip("\n")`, it should be fine.
Let's double check if this affects anything else.
The YAML block is then parsed by a YAML parser (presumably `PyYAML` if installed, or some other mechanism in `tap`). `Parser.parse_text` probably calls this.
Let's look at `Parser.parse_text` to see how it's used.
TOOL CALL · read_file
{
"end_line": 170,
"filepath": "tap/parser.py",
"start_line": 130
}Result of read_file 1,571 characters
{
"status": "ok",
"filepath": "tap/parser.py",
"content": "\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)\n\n def _parse_result(self, ok, match, fh=None):\n \"\"\"Parse a matching result line into a result instance.\"\"\"\n peek_match = None\n try:\n if fh is not None and ENABLE_VERSION_13 and isinstance(fh, peekable):\n peek_match = self.yaml_block_start.match(fh.peek())\n except StopIteration:\n pass\n if peek_match is None:\n return Result(\n ok,\n number=match.group(\"number\"),\n description=match.group(\"description\").strip(),\n directive=Directive(match.group(\"directive\")),\n )\n indent = peek_match.group(\"indent\")\n concat_yaml = self._extract_yaml_block(indent, fh)\n return Result(\n ok,",
"start_line": 130,
"end_line": 170,
"total_lines": 199,
"is_truncated": false
}Generated tokens 1,160 tokens · stopped: STOP
The code:
```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)
```
`next(fh)` returns the line including the newline character.
`raw_yaml.append(next(fh).replace(indent, "", 1))` appends the line.
Then `"\n".join(raw_yaml)` adds another newline between lines.
If the lines are:
`" line1\n"`
`" line2\n"`
And $indent$ is `" "`.
`raw_yaml` becomes `['line1\n', 'line2\n']`.
`"\n".join(raw_yaml)` becomes `"line1\n\nline2\n"`.
The fix is to remove the trailing newline from each line before appending, or just join with an empty string if we want to preserve the newlines already present. But usually, when using `"".join(lines)`, we expect the lines to have newlines. If we use `"\n".join(lines)`, we expect the lines NOT to have newlines.
Wait, if I just use `"".join(raw_yaml)`, it should work if `raw_yaml` contains the newlines.
However, `next(fh)` for the last line might not have a newline if it's the end of the file, or the `replace(indent, "", 1)` might behave differently.
Actually, the most robust way is to strip the trailing newline and then join with `\n`.
Wait, if I use `raw_yaml.append(next(fh).rstrip("\n").replace(indent, "", 1))`, that might be problematic if the line has trailing whitespace that should be preserved in YAML. YAML strings can be sensitive to trailing whitespace depending on the block scalar indicator (`|`, `|+`, `|-`).
Actually, if we look at how `next(fh)` works, it typically returns the line ending in `\n`.
If we want to use `"\n".join(raw_yaml)`, we should make sure the elements of `raw_yaml` don't have trailing newlines.
The issue is specifically mentioning `"\n".join(raw_yaml)` without having stripped the newline character.
If I change:
`raw_yaml.append(next(fh).replace(indent, "", 1))`
to:
`raw_yaml.append(next(fh).rstrip("\n").replace(indent, "", 1))`
But wait, if the line is `" line1 \n"`, `rstrip("\n")` will result in `" line1 "`. Then `replace(indent, "", 1)` will result in `"line1 "`. This seems correct.
Actually, if I use `.rstrip('\r\n')` it's safer for cross-platform. But usually `open()` on files in Python handles `\n` universally.
Let's check if there are other places where `_extract_yaml_block` is used or if it's just used here.
It's a helper method of `Parser`.
Wait, if the lines in `raw_yaml` already have newlines, why not just use `"".join(raw_yaml)`?
Because the last line might not have a newline, and `"".join()` wouldn't add one. But `"\n".join()` always adds newlines between elements.
If we have:
`line 1\n`
`line 2\n`
`line 3` (last line, no newline)
`"".join()` -> `line 1\nline 2\nline 3`
`"\n".join()` (after stripping) -> `line 1\nline 2\nline 3`
If we don't strip:
`"\n".join()` -> `line 1\n\nline 2\n\nline 3`
So stripping the trailing newline is correct.
Wait, the `replace(indent, "", 1)` happens after `next(fh)`.
If I do `next(fh).replace(indent, "", 1).rstrip("\n")`, it should be fine.
Let's double check if this affects anything else.
The YAML block is then parsed by a YAML parser (presumably `PyYAML` if installed, or some other mechanism in `tap`). `Parser.parse_text` probably calls this.
Let's look at `Parser.parse_text` to see how it's used.
<channel|><|tool_call>call:read_file{end_line:170,filepath:<|"|>tap/parser.py<|"|>,start_line:130}<tool_call|><|tool_response>
Turn 5at 127 s207 tokens out6,683 prompt tokens
In `_parse_result`, it calls `_extract_yaml_block(indent, fh)`.
The `fh` is passed as a `peekable` iterator.
The lines are read from `fh` using `next(fh)`.
The `peekable` is likely from `peekable` module or a similar implementation.
If I use `rstrip("\n")`, it might remove all trailing newlines if there are multiple. `rstrip()` removes all trailing characters that match.
To remove only one newline at the end, I should use:
`line = line[:-1] if line.endswith('\n') else line`
Or use `line.removesuffix('\n')` if Python 3.9+.
The environment seems to be using Python 3 since it's `python3 - <<'PY'`.
Let's check Python version.
TOOL CALL · run_command
{
"command": "python3 --version"
}Result of run_command 76 characters
{
"status": "ok",
"stdout": "Python 3.10.19\n",
"stderr": "",
"exit_code": 0
}Generated tokens 207 tokens · stopped: STOP
In `_parse_result`, it calls `_extract_yaml_block(indent, fh)`.
The `fh` is passed as a `peekable` iterator.
The lines are read from `fh` using `next(fh)`.
The `peekable` is likely from `peekable` module or a similar implementation.
If I use `rstrip("\n")`, it might remove all trailing newlines if there are multiple. `rstrip()` removes all trailing characters that match.
To remove only one newline at the end, I should use:
`line = line[:-1] if line.endswith('\n') else line`
Or use `line.removesuffix('\n')` if Python 3.9+.
The environment seems to be using Python 3 since it's `python3 - <<'PY'`.
Let's check Python version.
<channel|><|tool_call>call:run_command{command:<|"|>python3 --version<|"|>}<tool_call|><|tool_response>
Turn 6at 138 s158 tokens out6,939 prompt tokens
Python 3.10.19 is used. So `removesuffix` is available. However, lines might end with `\r\n` or just `\n`. Usually, `open()` with `newline=None` (default) does universal newline translation. If `fh` is produced by `io.TextIOWrapper` (which `open()` does), `\n` is what we see. Let's see how `fh` is created. `parser.parse_text(tap_input)` is called in the reproduction.
TOOL CALL · read_file
{
"end_line": 120,
"filepath": "tap/parser.py",
"start_line": 100
}Result of read_file 1,024 characters
{
"status": "ok",
"filepath": "tap/parser.py",
"content": " 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)",
"start_line": 100,
"end_line": 120,
"total_lines": 199,
"is_truncated": false
}Generated tokens 158 tokens · stopped: STOP
Python 3.10.19 is used. So `removesuffix` is available.
However, lines might end with `\r\n` or just `\n`.
Usually, `open()` with `newline=None` (default) does universal newline translation.
If `fh` is produced by `io.TextIOWrapper` (which `open()` does), `\n` is what we see.
Let's see how `fh` is created. `parser.parse_text(tap_input)` is called in the reproduction.
<channel|><|tool_call>call:read_file{end_line:120,filepath:<|"|>tap/parser.py<|"|>,start_line:100}<tool_call|><|tool_response>
Turn 7at 352 s3,300 tokens out7,411 prompt tokens
In `parse_text` (which I assume is where this loop is), it does:
`for line in fh_new: yield self.parse_line(line.rstrip(), fh_new)`
Wait, `line.rstrip()` is passed as `text` to `parse_line`.
And `fh_new` (the peekable iterator) is passed as `fh`.
When `_parse_result` is called, it uses `fh`.
Inside `_extract_yaml_block`, it does `next(fh)`.
Since `fh` is an iterator over the lines of the input text, `next(fh)` will return the line including the newline character.
Example:
`tap_input` = `...`
`fh` iterates over `tap_input.splitlines(keepends=True)` (essentially what happens when iterating over a file or similar).
If `fh.peek()` is used, it returns the next line.
The original code:
`raw_yaml.append(next(fh).replace(indent, "", 1))`
`return "\n".join(raw_yaml)`
If the lines are:
`" message: test\n"`
`" severity: fail\n"`
`" output: |+\n"`
`" this is a multiline\n"`
`" string but with tap\n"`
Wait, `_extract_yaml_block` is called AFTER `peek_match = self.yaml_block_start.match(fh.peek())`.
`yaml_block_start` likely matches the `---` line.
Then `_extract_yaml_block` does `next(fh)` to skip the `---` line.
Then it checks `while indent_match.match(fh.peek()):`.
For the first line of YAML (e.g., ` message: test\n`), `indent_match` will match because it starts with ` `.
Then `raw_yaml.append(next(fh).replace(indent, "", 1))` will append `"message: test\n"`.
Then it continues until it doesn't match the indent.
So for:
```
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
`indent` will be `" "`.
`raw_yaml` will be:
`["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"]`
Wait, for the `output` lines, the indent is actually 4 spaces ` `, but `indent_match` is `re.compile(r"^{}".format(indent))` where `indent` is `" "`. So it still matches because it starts with at least 3 spaces.
And `replace(indent, "", 1)` only removes the first 3 spaces.
So `" this is a multiline\n"` becomes `" this is a multiline\n"`.
Then `"\n".join(raw_yaml)` results in:
`"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"`
This is indeed the problem.
The fix should be to remove the trailing newline from each line.
```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()):
line = next(fh)
raw_yaml.append(line.rstrip("\n").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)
```
Wait, if I use `rstrip("\n")`, it removes trailing `\n`. But what if the line ends with `\r\n`? `rstrip("\n")` would leave `\r`.
Actually, `rstrip("\r\n")` would be safer. But again, it removes all trailing `\r` and `\n`.
The most precise way is `line[:-1] if line.endswith('\n') else line`.
But in Python's universal newlines mode, we only see `\n`.
Let's see if `removesuffix("\n")` is better. It only removes one.
But what if the line is the last line and doesn't have a newline? `removesuffix` won't do anything, which is correct.
Wait, if I use `line.rstrip("\n")`, and there are multiple newlines at the end of the line, they will all be removed. YAML allows trailing whitespace/newlines in some cases.
Actually, looking at the problem description:
`_extract_yaml_block()` performs `"\n".join(raw_yaml)` without having stripped the newline character in each possible line.
The simplest fix that addresses this is probably `rstrip("\n")` or `removesuffix("\n")`.
Let's test `rstrip("\n")` vs `removesuffix("\n")`.
If a line is `" text \n"`, `rstrip("\n")` gives `" text "`.
If a line is `" text \n\n"`, `rstrip("\n")` gives `" text "`.
If a line is `" text \n\n"`, `removesuffix("\n")` gives `" text \n"`.
Usually, `next(fh)` on a file returns exactly one newline at the end (unless it's the EOF).
Let's try `rstrip("\n")` first as it's common, but `removesuffix("\n")` is more precise for "the newline character".
Actually, if I use `"".join(raw_yaml)` instead of `"\n".join(raw_yaml)`, would that work?
If `raw_yaml` elements are `["line1\n", "line2\n", "line3"]`, then `"".join()` gives `"line1\nline2\nline3"`.
If I use `"\n".join()`, I get `"line1\n\nline2\n\nline3"`.
But `_extract_yaml_block` is removing the indent: `.replace(indent, "", 1)`.
If we use `"".join(raw_yaml)`, we are not removing the trailing newline.
If the input is:
```
---
a: 1
b: 2
```
`indent` = `" "`
`raw_yaml` = `["a: 1\n", "b: 2\n"]`
`"".join(raw_yaml)` = `"a: 1\nb: 2\n"`
`"\n".join(raw_yaml)` = `"a: 1\n\nb: 2\n"`
Wait, if the original developer used `"\n".join(raw_yaml)`, they probably intended to control the joiner.
If we change it to `"".join(raw_yaml)`, it might be simpler.
However, let's check if the last line needs a newline for the YAML parser.
Most YAML parsers don't care if there is a trailing newline.
Actually, if `raw_yaml` contains lines with newlines, and we want to preserve them, `"".join(raw_yaml)` is the way to go.
But the lines were processed with `.replace(indent, "", 1)`.
If we have:
```
---
line1
line2
```
Lines are `" line1\n"` and `" line2\n"`.
Processed: `"line1\n"` and `"line2\n"`.
`"".join()` -> `"line1\nline2\n"`
`"\n".join()` (stripped) -> `"line1\nline2"`
Wait, if the result is passed to a YAML parser, both should work.
Let's see what the PR actually did (the hint says "#112"). I don't have access to the PR, but the hint mentions `tap/parser.py` was modified and coverage remained 100%.
If I use `rstrip("\n")` it will remove the newline.
Let's try to reproduce again and see exactly what is happening.
The problem example output has:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
This means the string `l.yaml_block["output"]` has empty lines.
`splitlines()` on `" \n \n "` gives `[' ', ' ' ]`.
Wait, if the actual output of `l.yaml_block["output"].splitlines()` is `['', 'this is a multiline', ...]` that means there's a newline at the beginning or between lines.
If `raw_yaml` elements were `[' this is a multiline\n', ' string but with tap\n', ...]`
and we did `"\n".join(raw_yaml)`, we get:
`' this is a multiline\n\n string but with tap\n\n...'`
`splitlines()` on this:
`[' this is a multiline', '', ' string but with tap', '', ...]`
Wait, the user's output was:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
There's a leading `''`. This is strange.
Wait, look at the output again:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
This means the string starts with a newline.
How can it start with a newline?
`_extract_yaml_block` does:
```python
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
```
`next(fh)` skips the `---` line.
Then it enters the loop.
The first line matched by `indent_match` is ` message: test\n`.
`raw_yaml` becomes `["message: test\n"]`.
And so on.
If the lines are:
`"message: test\n"`
`"severity: fail\n"`
`"output: |+\n"`
`" this is a multiline\n"`
`" string but with tap\n"`
Then `"\n".join(raw_yaml)` is `"message: test\n\nseverity: fail\n\noutput: |+\n\n this is a multiline\n\n string but with tap\n"`.
Wait, if we parse this as YAML:
`message: test`
(empty line)
`severity: fail`
(empty line)
`output: |+`
(empty line)
` this is a multiline`
(empty line)
` string but with tap`
Actually, if the YAML parser is parsing this, the empty lines between keys are fine.
But the empty line after `output: |+` might be considered part of the value if it's indented.
But it's not indented! It's just `\n`.
Wait, `output: |+` is followed by `\n\n this is a multiline\n`.
The `\n` immediately after `|+` is expected (it's the start of the block).
The SECOND `\n` is the one added by `"\n".join()`.
So it becomes:
```yaml
output: |+
this is a multiline
string but with tap
```
And in YAML, `|+` means "keep trailing newlines".
So the value of `output` will start with a newline, then " this is a multiline", then a newline, etc.
Thus `splitlines()` gives `['', 'this is a multiline', '', 'string but with tap', ...]`.
This explains the user's output perfectly.
The fix is indeed to remove the newline from each line before joining with `\n`.
I'll use `.rstrip("\n")`. In Python, `\n` is the universal newline character returned by `io`.
```python
raw_yaml.append(next(fh).rstrip("\n").replace(indent, "", 1))
```
Wait, should I `rstrip("\n")` before or after `replace(indent, "", 1)`?
If I do `next(fh).replace(indent, "", 1).rstrip("\n")`, the indent is removed first, then the newline. This is cleaner.
Let's verify if `replace(indent, "", 1)` is safe. Yes, it only removes the first occurrence.
Actually, I should use `rstrip("\n")` to be safe.
Let's check if `rstrip("\n")` would remove too much if the line ends with multiple newlines. YAML blocks preserve trailing newlines.
Wait, if the line was `" text\n\n"`, `rstrip("\n")` makes it `" text"`.
But `next(fh)` only returns ONE newline at the end of the line.
Unless the file has `\r\n` and we are not in universal mode, but we are.
So `next(fh)` will return `" text\n"`.
Wait, if the line was `" text \n"`, `rstrip("\n")` gives `" text "`. This is correct.
Let's verify the fix with the reproduction script.
TOOL CALL · edit_file
{
"filepath": "tap/parser.py",
"new_string": " raw_yaml.append(next(fh).replace(indent, \"\", 1).rstrip(\"\\n\"))",
"old_string": " raw_yaml.append(next(fh).replace(indent, \"\", 1))"
}Result of edit_file 589 characters
{
"status": "ok",
"filepath": "tap/parser.py",
"occurrences": 1,
"strategy": "exact",
"diff": "--- a/tap/parser.py\n+++ b/tap/parser.py\n@@ -181,7 +181,7 @@\n try:\n next(fh)\n while indent_match.match(fh.peek()):\n- raw_yaml.append(next(fh).replace(indent, \"\", 1))\n+ raw_yaml.append(next(fh).replace(indent, \"\", 1).rstrip(\"\\n\"))\n # check for the end and stop adding yaml if encountered\n if self.yaml_block_end.match(fh.peek()):\n next(fh)\n",
"is_truncated": false
}Generated tokens 3,300 tokens · stopped: STOP
In `parse_text` (which I assume is where this loop is), it does:
`for line in fh_new: yield self.parse_line(line.rstrip(), fh_new)`
Wait, `line.rstrip()` is passed as `text` to `parse_line`.
And `fh_new` (the peekable iterator) is passed as `fh`.
When `_parse_result` is called, it uses `fh`.
Inside `_extract_yaml_block`, it does `next(fh)`.
Since `fh` is an iterator over the lines of the input text, `next(fh)` will return the line including the newline character.
Example:
`tap_input` = `...`
`fh` iterates over `tap_input.splitlines(keepends=True)` (essentially what happens when iterating over a file or similar).
If `fh.peek()` is used, it returns the next line.
The original code:
`raw_yaml.append(next(fh).replace(indent, "", 1))`
`return "\n".join(raw_yaml)`
If the lines are:
`" message: test\n"`
`" severity: fail\n"`
`" output: |+\n"`
`" this is a multiline\n"`
`" string but with tap\n"`
Wait, `_extract_yaml_block` is called AFTER `peek_match = self.yaml_block_start.match(fh.peek())`.
`yaml_block_start` likely matches the `---` line.
Then `_extract_yaml_block` does `next(fh)` to skip the `---` line.
Then it checks `while indent_match.match(fh.peek()):`.
For the first line of YAML (e.g., ` message: test\n`), `indent_match` will match because it starts with ` `.
Then `raw_yaml.append(next(fh).replace(indent, "", 1))` will append `"message: test\n"`.
Then it continues until it doesn't match the indent.
So for:
```
---
message: test
severity: fail
output: |+
this is a multiline
string but with tap
somehow blank lines
are added to it.
```
`indent` will be `" "`.
`raw_yaml` will be:
`["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"]`
Wait, for the `output` lines, the indent is actually 4 spaces ` `, but `indent_match` is `re.compile(r"^{}".format(indent))` where `indent` is `" "`. So it still matches because it starts with at least 3 spaces.
And `replace(indent, "", 1)` only removes the first 3 spaces.
So `" this is a multiline\n"` becomes `" this is a multiline\n"`.
Then `"\n".join(raw_yaml)` results in:
`"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"`
This is indeed the problem.
The fix should be to remove the trailing newline from each line.
```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()):
line = next(fh)
raw_yaml.append(line.rstrip("\n").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)
```
Wait, if I use `rstrip("\n")`, it removes trailing `\n`. But what if the line ends with `\r\n`? `rstrip("\n")` would leave `\r`.
Actually, `rstrip("\r\n")` would be safer. But again, it removes all trailing `\r` and `\n`.
The most precise way is `line[:-1] if line.endswith('\n') else line`.
But in Python's universal newlines mode, we only see `\n`.
Let's see if `removesuffix("\n")` is better. It only removes one.
But what if the line is the last line and doesn't have a newline? `removesuffix` won't do anything, which is correct.
Wait, if I use `line.rstrip("\n")`, and there are multiple newlines at the end of the line, they will all be removed. YAML allows trailing whitespace/newlines in some cases.
Actually, looking at the problem description:
`_extract_yaml_block()` performs `"\n".join(raw_yaml)` without having stripped the newline character in each possible line.
The simplest fix that addresses this is probably `rstrip("\n")` or `removesuffix("\n")`.
Let's test `rstrip("\n")` vs `removesuffix("\n")`.
If a line is `" text \n"`, `rstrip("\n")` gives `" text "`.
If a line is `" text \n\n"`, `rstrip("\n")` gives `" text "`.
If a line is `" text \n\n"`, `removesuffix("\n")` gives `" text \n"`.
Usually, `next(fh)` on a file returns exactly one newline at the end (unless it's the EOF).
Let's try `rstrip("\n")` first as it's common, but `removesuffix("\n")` is more precise for "the newline character".
Actually, if I use `"".join(raw_yaml)` instead of `"\n".join(raw_yaml)`, would that work?
If `raw_yaml` elements are `["line1\n", "line2\n", "line3"]`, then `"".join()` gives `"line1\nline2\nline3"`.
If I use `"\n".join()`, I get `"line1\n\nline2\n\nline3"`.
But `_extract_yaml_block` is removing the indent: `.replace(indent, "", 1)`.
If we use `"".join(raw_yaml)`, we are not removing the trailing newline.
If the input is:
```
---
a: 1
b: 2
```
`indent` = `" "`
`raw_yaml` = `["a: 1\n", "b: 2\n"]`
`"".join(raw_yaml)` = `"a: 1\nb: 2\n"`
`"\n".join(raw_yaml)` = `"a: 1\n\nb: 2\n"`
Wait, if the original developer used `"\n".join(raw_yaml)`, they probably intended to control the joiner.
If we change it to `"".join(raw_yaml)`, it might be simpler.
However, let's check if the last line needs a newline for the YAML parser.
Most YAML parsers don't care if there is a trailing newline.
Actually, if `raw_yaml` contains lines with newlines, and we want to preserve them, `"".join(raw_yaml)` is the way to go.
But the lines were processed with `.replace(indent, "", 1)`.
If we have:
```
---
line1
line2
```
Lines are `" line1\n"` and `" line2\n"`.
Processed: `"line1\n"` and `"line2\n"`.
`"".join()` -> `"line1\nline2\n"`
`"\n".join()` (stripped) -> `"line1\nline2"`
Wait, if the result is passed to a YAML parser, both should work.
Let's see what the PR actually did (the hint says "#112"). I don't have access to the PR, but the hint mentions `tap/parser.py` was modified and coverage remained 100%.
If I use `rstrip("\n")` it will remove the newline.
Let's try to reproduce again and see exactly what is happening.
The problem example output has:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
This means the string `l.yaml_block["output"]` has empty lines.
`splitlines()` on `" \n \n "` gives `[' ', ' ' ]`.
Wait, if the actual output of `l.yaml_block["output"].splitlines()` is `['', 'this is a multiline', ...]` that means there's a newline at the beginning or between lines.
If `raw_yaml` elements were `[' this is a multiline\n', ' string but with tap\n', ...]`
and we did `"\n".join(raw_yaml)`, we get:
`' this is a multiline\n\n string but with tap\n\n...'`
`splitlines()` on this:
`[' this is a multiline', '', ' string but with tap', '', ...]`
Wait, the user's output was:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
There's a leading `''`. This is strange.
Wait, look at the output again:
`['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to it.']`
This means the string starts with a newline.
How can it start with a newline?
`_extract_yaml_block` does:
```python
try:
next(fh)
while indent_match.match(fh.peek()):
raw_yaml.append(next(fh).replace(indent, "", 1))
```
`next(fh)` skips the `---` line.
Then it enters the loop.
The first line matched by `indent_match` is ` message: test\n`.
`raw_yaml` becomes `["message: test\n"]`.
And so on.
If the lines are:
`"message: test\n"`
`"severity: fail\n"`
`"output: |+\n"`
`" this is a multiline\n"`
`" string but with tap\n"`
Then `"\n".join(raw_yaml)` is `"message: test\n\nseverity: fail\n\noutput: |+\n\n this is a multiline\n\n string but with tap\n"`.
Wait, if we parse this as YAML:
`message: test`
(empty line)
`severity: fail`
(empty line)
`output: |+`
(empty line)
` this is a multiline`
(empty line)
` string but with tap`
Actually, if the YAML parser is parsing this, the empty lines between keys are fine.
But the empty line after `output: |+` might be considered part of the value if it's indented.
But it's not indented! It's just `\n`.
Wait, `output: |+` is followed by `\n\n this is a multiline\n`.
The `\n` immediately after `|+` is expected (it's the start of the block).
The SECOND `\n` is the one added by `"\n".join()`.
So it becomes:
```yaml
output: |+
this is a multiline
string but with tap
```
And in YAML, `|+` means "keep trailing newlines".
So the value of `output` will start with a newline, then " this is a multiline", then a newline, etc.
Thus `splitlines()` gives `['', 'this is a multiline', '', 'string but with tap', ...]`.
This explains the user's output perfectly.
The fix is indeed to remove the newline from each line before joining with `\n`.
I'll use `.rstrip("\n")`. In Python, `\n` is the universal newline character returned by `io`.
```python
raw_yaml.append(next(fh).rstrip("\n").replace(indent, "", 1))
```
Wait, should I `rstrip("\n")` before or after `replace(indent, "", 1)`?
If I do `next(fh).replace(indent, "", 1).rstrip("\n")`, the indent is removed first, then the newline. This is cleaner.
Let's verify if `replace(indent, "", 1)` is safe. Yes, it only removes the first occurrence.
Actually, I should use `rstrip("\n")` to be safe.
Let's check if `rstrip("\n")` would remove too much if the line ends with multiple newlines. YAML blocks preserve trailing newlines.
Wait, if the line was `" text\n\n"`, `rstrip("\n")` makes it `" text"`.
But `next(fh)` only returns ONE newline at the end of the line.
Unless the file has `\r\n` and we are not in universal mode, but we are.
So `next(fh)` will return `" text\n"`.
Wait, if the line was `" text \n"`, `rstrip("\n")` gives `" text "`. This is correct.
Let's verify the fix with the reproduction script.
<channel|><|tool_call>call:edit_file{filepath:<|"|>tap/parser.py<|"|>,new_string:<|"|> raw_yaml.append(next(fh).replace(indent, "", 1).rstrip("\n"))<|"|>,old_string:<|"|> raw_yaml.append(next(fh).replace(indent, "", 1))<|"|>}<tool_call|><|tool_response>
Turn 8at 360 s171 tokens out10,917 prompt tokens
Now let's run the reproduction script and see if it's fixed.
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
}Generated tokens 171 tokens · stopped: STOP
Now let's run the reproduction script and see if it's fixed.
<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>
Turn 9at 367 s101 tokens out11,154 prompt tokens
The output is now: `['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']` Which is exactly what was expected. Now I should check if this change affects anything else. Let's run existing tests for the parser.
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
}Generated tokens 101 tokens · stopped: STOP
The output is now:
`['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
Which is exactly what was expected.
Now I should check if this change affects anything else.
Let's run existing tests for the parser.
<channel|><|tool_call>call:run_command{command:<|"|>pytest tap/tests/test_parser.py -q --tb=short --no-header<|"|>}<tool_call|><|tool_response>
Turn 10at 374 s114 tokens out11,316 prompt tokens
All parser tests passed. Wait, I should check if there are other places where `_extract_yaml_block` is used or if there are other similar methods. I searched for `_extract_yaml_block` and it only appeared once. Let's check if there are other YAML blocks being extracted in other ways. I'll grep for `yaml` in `tap/parser.py`.
TOOL CALL · run_command
{
"command": "grep -n \"yaml\" tap/parser.py"
}Result of run_command 868 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).rstrip(\"\\n\"))\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
}Generated tokens 114 tokens · stopped: STOP
All parser tests passed.
Wait, I should check if there are other places where `_extract_yaml_block` is used or if there are other similar methods.
I searched for `_extract_yaml_block` and it only appeared once.
Let's check if there are other YAML blocks being extracted in other ways.
I'll grep for `yaml` in `tap/parser.py`.
<channel|><|tool_call>call:run_command{command:<|"|>grep -n "yaml" tap/parser.py<|"|>}<tool_call|><|tool_response>
Turn 11at 396 s252 tokens out11,758 prompt tokens
It seems `_extract_yaml_block` is the only place where the YAML block is read.
One thing to consider: what if the line ended with `\r\n`?
In Python, if the file is opened with `open(filename, 'r')`, it uses universal newlines by default, so `\r\n` is converted to `\n`.
In `parse_text`, the input is a string.
If we use `peekable(itertools.chain([first_line], fh))`, where `fh` is an iterator of lines from `text.splitlines(keepends=True)` (wait, let's check how `parse_text` works).
Looking back at `parse_text` (I only read a part of it):
```python
def parse_text(self, text):
# ... (not shown in the previous read_file, but I can infer)
```
Wait, let me read `parse_text` fully.
TOOL CALL · read_file
{
"end_line": 120,
"filepath": "tap/parser.py",
"start_line": 80
}Result of read_file 1,838 characters
{
"status": "ok",
"filepath": "tap/parser.py",
"content": " \"\"\"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)",
"start_line": 80,
"end_line": 120,
"total_lines": 199,
"is_truncated": false
}Generated tokens 252 tokens · stopped: STOP
It seems `_extract_yaml_block` is the only place where the YAML block is read.
One thing to consider: what if the line ended with `\r\n`?
In Python, if the file is opened with `open(filename, 'r')`, it uses universal newlines by default, so `\r\n` is converted to `\n`.
In `parse_text`, the input is a string.
If we use `peekable(itertools.chain([first_line], fh))`, where `fh` is an iterator of lines from `text.splitlines(keepends=True)` (wait, let's check how `parse_text` works).
Looking back at `parse_text` (I only read a part of it):
```python
def parse_text(self, text):
# ... (not shown in the previous read_file, but I can infer)
```
Wait, let me read `parse_text` fully.
<channel|><|tool_call>call:read_file{end_line:120,filepath:<|"|>tap/parser.py<|"|>,start_line:80}<tool_call|><|tool_response>
Turn 12at 439 s573 tokens out12,529 prompt tokens
In `parse_text`, it calls `self.parse(StringIO(text))`.
`StringIO` in Python also implements universal newlines.
And when iterating over it, it preserves the newlines (including the trailing one).
So `next(fh)` will return a line ending in `\n`.
Is `rstrip("\n")` the best choice?
If I want to remove only one trailing newline, `removesuffix("\n")` is better.
If a line is `" text\n\n"`, `rstrip("\n")` makes it `" text"`.
But does `StringIO` or file iteration ever return `\n\n` at the end of a line?
No, it returns one line at a time, and each line has at most one trailing newline character.
Actually, let's check if `rstrip("\n")` might be too aggressive.
If the line ended with a space and then a newline: `" text \n"`.
`rstrip("\n")` -> `" text "`. This is correct.
If the line ended with a newline and then another newline (meaning an empty line):
Line 1: `" text\n"`
Line 2: `" \n"`
Line 3: `" text2\n"`
`raw_yaml` elements: `["text\n", " \n", "text2\n"]`
With `rstrip("\n")`: `["text", " ", "text2"]`.
`"\n".join()` -> `"text\n \ntext2"`.
This preserves the empty line (or rather, the line with spaces) correctly.
One edge case: what if the last line of the YAML block doesn't have a newline?
`" last line"` (no `\n`)
`rstrip("\n")` -> `" last line"`. Correct.
So `rstrip("\n")` seems perfectly fine and safe here.
I'll double check if there are any other parallel paths.
The codebase seems simple enough. `_extract_yaml_block` is only called in `_parse_result`.
I'll do a final check on the code to make sure I didn't miss any other `_extract_yaml_block` calls.
`grep -rn "_extract_yaml_block" tap/`
Wait, I already did `grep -rn "yaml" tap/parser.py`.
Let's check `tap/` recursively for `_extract_yaml_block`.
TOOL CALL · run_command
{
"command": "grep -rn \"_extract_yaml_block\" tap/"
}Result of run_command 204 characters
{
"status": "ok",
"stdout": "tap/parser.py:168: concat_yaml = self._extract_yaml_block(indent, fh)\ntap/parser.py:177: def _extract_yaml_block(self, indent, fh):\n",
"stderr": "",
"exit_code": 0
}Generated tokens 573 tokens · stopped: STOP
In `parse_text`, it calls `self.parse(StringIO(text))`.
`StringIO` in Python also implements universal newlines.
And when iterating over it, it preserves the newlines (including the trailing one).
So `next(fh)` will return a line ending in `\n`.
Is `rstrip("\n")` the best choice?
If I want to remove only one trailing newline, `removesuffix("\n")` is better.
If a line is `" text\n\n"`, `rstrip("\n")` makes it `" text"`.
But does `StringIO` or file iteration ever return `\n\n` at the end of a line?
No, it returns one line at a time, and each line has at most one trailing newline character.
Actually, let's check if `rstrip("\n")` might be too aggressive.
If the line ended with a space and then a newline: `" text \n"`.
`rstrip("\n")` -> `" text "`. This is correct.
If the line ended with a newline and then another newline (meaning an empty line):
Line 1: `" text\n"`
Line 2: `" \n"`
Line 3: `" text2\n"`
`raw_yaml` elements: `["text\n", " \n", "text2\n"]`
With `rstrip("\n")`: `["text", " ", "text2"]`.
`"\n".join()` -> `"text\n \ntext2"`.
This preserves the empty line (or rather, the line with spaces) correctly.
One edge case: what if the last line of the YAML block doesn't have a newline?
`" last line"` (no `\n`)
`rstrip("\n")` -> `" last line"`. Correct.
So `rstrip("\n")` seems perfectly fine and safe here.
I'll double check if there are any other parallel paths.
The codebase seems simple enough. `_extract_yaml_block` is only called in `_parse_result`.
I'll do a final check on the code to make sure I didn't miss any other `_extract_yaml_block` calls.
`grep -rn "_extract_yaml_block" tap/`
Wait, I already did `grep -rn "yaml" tap/parser.py`.
Let's check `tap/` recursively for `_extract_yaml_block`.<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "_extract_yaml_block" tap/<|"|>}<tool_call|><|tool_response>
Patch, tests and logs
Final code change Included
diff --git a/tap/parser.py b/tap/parser.py
index 637436b..6cc2dc9 100644
--- a/tap/parser.py
+++ b/tap/parser.py
@@ -181,7 +181,7 @@ WARNING: Optional imports not found, TAP 13 output will be
try:
next(fh)
while indent_match.match(fh.peek()):
- raw_yaml.append(next(fh).replace(indent, "", 1))
+ raw_yaml.append(next(fh).replace(indent, "", 1).rstrip("\n"))
# check for the end and stop adding yaml if encountered
if self.yaml_block_end.match(fh.peek()):
next(fh)
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-f99a651df3d04dfa9e35f8966e01fef9.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 0.25s ==============================
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="0.249" timestamp="2026-11-14T03:26:40.560037+00:00" hostname="5388c3f19d92"><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="0.001" /><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="0.001" /><testcase classname="tap.tests.test_directive.TestDirective" name="test_skip_at_beginning" time="0.001" /><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="0.001" /><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="0.000" /><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="0.000" /><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="0.001" /><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="0.001" /><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="0.002" /><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="0.001" /><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="0.001" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_yaml_no_association" time="0.001" /><testcase classname="tap.tests.test_parser.TestParser" name="test_parses_yaml_no_end" time="0.000" /><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="0.001" /><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.
[ 31.3s] 💭 (1341 chars) "The user is reporting a bug in `_extract_yaml_block()` in `tap/parser.py`.
When parsing a multi-line string in a YAML bl..."
[ 31.3s] 🔧 run_command (21 lines) python3 - <<'PY'
[ 31.5s] → ['', 'this is a multiline', '', 'string but with tap', '', 'somehow blank lines', '', 'are added to
it.']
[ 35.9s] 💭 (155 chars) "The bug is reproduced. The output contains empty strings, which means extra newlines are
present.
Now let's find `_extr..."
[ 35.9s] 🔧 run_command grep -rn "def _extract_yaml_block" tap/parser.py
[ 35.9s] → 177: def _extract_yaml_block(self, indent, fh):
[ 40.2s] 💭 (55 chars) "Let's read the code around line 177 in `tap/parser.py`."
[ 40.2s] 📖 read_file (tap/parser.py)
[ 40.2s] ✓ {'status': 'ok', 'filepath': 'tap/parser.py', 'content': ' ok,\n
number=match.group("number"),\n …
[ 111.2s] 💭 (3726 chars) "The code:
```python
def _extract_yaml_block(self, indent, fh):
"""Extract a raw yaml block from a file handl..."
[ 111.2s] 📖 read_file (tap/parser.py)
[ 111.3s] ✓ {'status': 'ok', 'filepath': 'tap/parser.py', 'content': '\n match = self.bail.match(text)\n
if match:\n …
[ 125.7s] 💭 (631 chars) "In `_parse_result`, it calls `_extract_yaml_block(indent, fh)`.
The `fh` is passed as a `peekable` iterator.
The lines ..."
[ 125.7s] 🔧 run_command python3 --version
[ 125.7s] → Python 3.10.19
[ 136.2s] 💭 (371 chars) "Python 3.10.19 is used. So `removesuffix` is available.
However, lines might end with `\r\n` or just `\n`.
Usually, `op..."
[ 136.2s] 📖 read_file (tap/parser.py)
[ 136.2s] ✓ {'status': 'ok', 'filepath': 'tap/parser.py', 'content': ' if first_parsed.category ==
"version" and first_pa…
[ 350.6s] 💭 (10041 chars) "In `parse_text` (which I assume is where this loop is), it does:
`for line in fh_new: yield self.parse_line(line.rstrip(..."
[ 350.6s] ✏️ edit_file (tap/parser.py)
[ 350.7s] ✓ {'status': 'ok', 'filepath': 'tap/parser.py', 'occurrences': 1, 'strategy': 'exact', 'diff': '---
a/tap/parser.py\n+++ b…
[ 359.1s] 💭 (60 chars) "Now let's run the reproduction script and see if it's fixed."
[ 359.1s] 🔧 run_command (21 lines) python3 - <<'PY'
[ 359.2s] → ['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']
[ 365.7s] 💭 (245 chars) "The output is now:
`['this is a multiline', 'string but with tap', 'somehow blank lines', 'are added to it.']`
Which is ..."
[ 365.7s] 🔧 run_command pytest tap/tests/test_parser.py -q --tb=short --no-header
[ 366.1s] → ........................... [100%]
[ 373.0s] 💭 (327 chars) "All parser tests passed.
Wait, I should check if there are other places where `_extract_yaml_block` is used or if there..."
[ 373.0s] 🔧 run_command grep -n "yaml" tap/parser.py
[ 373.0s] → 14: import yaml # noqa
[ 394.7s] 💭 (695 chars) "It seems `_extract_yaml_block` is the only place where the YAML block is read.
One thing to consider: what if the line ..."
[ 394.7s] 📖 read_file (tap/parser.py)
[ 394.7s] ✓ {'status': 'ok', 'filepath': 'tap/parser.py', 'content': ' """Parse a string containing one or
more lines of TAP …
[ 437.6s] 💭 (1737 chars) "In `parse_text`, it calls `self.parse(StringIO(text))`.
`StringIO` in Python also implements universal newlines.
And whe..."
[ 437.6s] 🔧 run_command grep -rn "_extract_yaml_block" tap/
[ 437.7s] → tap/parser.py:168: concat_yaml = self._extract_yaml_block(indent, fh)
Native result row
{
"agent_error": "Agent exceeded session timeout (7.5 min)",
"duration_seconds": 455.48,
"error": "Agent exceeded session timeout (7.5 min)",
"grade": {
"collected_tests": 114,
"competition_junit_ok": true,
"error": null,
"required_issues_count": 0,
"resolved": true,
"status_counts": {
"PASSED": 114
},
"strict_clean_patch": true,
"test_exit_code": 0
},
"instance_id": "python-tap__tappy-112",
"pass_idx": 0,
"patch_chars": 584,
"phase1_seconds": 454.01,
"repo": "python-tap/tappy",
"request_log_path": "/kaggle-root/working/r31/rollouts_X/requests/python-tap__tappy-112__p0__r2.jsonl",
"resolved": true,
"rollout_idx": 2,
"run_key": "python-tap__tappy-112__p0__r2",
"strict_clean_patch": true,
"tool_calls": 12,
"total_llm_calls": 12,
"trace_path": "/kaggle-root/working/r31/rollouts_X/traces/trace_python-tap__tappy-112__p0__r2.json"
}