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ROLLOUT 3 · Backblaze/B2_Command_Line_Tool

backblaze__b2_command_line_tool-488

Not solved
453 stotal time
14tool calls
14model calls
7,345tokens generated
129,385prompt tokens read

Test failures/errors recorded in JUnit XML (failures=1, errors=0)

Turn by turn

Token shading: p ≥ 0.9 0.5 – 0.9 0.2 – 0.5 below 0.2. Hover a token for its id and probability.

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 6,466 characters
You are evaluating a software engineering task for repository Backblaze/B2_Command_Line_Tool.

Problem Statement:
b2.api.B2Api.get_bucket_by_name does not work with bucket-scoped application keys
I am using Duplicity 0.7.17 and b2 1.3.2.

duplicity is executed using

```
duplicity \
    --verbosity debug \
    /backup \
    "b2://$B2_APP_KEY_ID:$B2_APP_KEY@$B2_BUCKET_NAME"
```

Where `$B2_APP_KEY_ID` and `$B2_APP_KEY` are URL-encoded strings which were output from a call to:

```
b2 create-key \
    --bucket "$B2_BUCKET_NAME" \
    "$B2_KEY_NAME" \
    listFiles,readFiles,writeFiles,deleteFiles,listBuckets
```

Duplicity fails with the following traceback:

```
Traceback (innermost last):
  File "/usr/local/bin/duplicity", line 1555, in <module>
    with_tempdir(main)
  File "/usr/local/bin/duplicity", line 1541, in with_tempdir
    fn()
  File "/usr/local/bin/duplicity", line 1380, in main
    action = commandline.ProcessCommandLine(sys.argv[1:])
  File "/usr/local/lib/python2.7/dist-packages/duplicity/commandline.py", line 1135, in ProcessCommandLine
    backup, local_pathname = set_backend(args[0], args[1])
  File "/usr/local/lib/python2.7/dist-packages/duplicity/commandline.py", line 1010, in set_backend
    globals.backend = backend.get_backend(bend)
  File "/usr/local/lib/python2.7/dist-packages/duplicity/backend.py", line 223, in get_backend
    obj = get_backend_object(url_string)
  File "/usr/local/lib/python2.7/dist-packages/duplicity/backend.py", line 209, in get_backend_object
    return factory(pu)
  File "/usr/local/lib/python2.7/dist-packages/duplicity/backends/b2backend.py", line 87, in __init__
    self.bucket = self.service.get_bucket_by_name(bucket_name)
  File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 222, in get_bucket_by_name
    for bucket in self.list_buckets():
  File "/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py", line 84, in wrapper
    return function(*wrapee_args, **wrapee_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 251, in list_buckets
    self.check_bucket_restrictions(bucket_name)
  File "/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py", line 84, in wrapper
    return function(*wrapee_args, **wrapee_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 375, in check_bucket_restrictions
    raise RestrictedBucket(allowed_bucket_name)
 RestrictedBucket: Application key is restricted to bucket: pc-backup
```

Internally<sup>[[1]](https://bazaar.launchpad.net/~duplicity-team/duplicity/0.8-series/view/head:/duplicity/backends/b2backend.py#L88)</sup>, Duplicity uses `b2.api.B2Api.get_bucket_by_name`, passing in the name of the bucket. This method calls `b2.api.B2Api.list_buckets` without passing the bucket name, so we get the permission error indicated above.

This looks related to changes in #474.

## 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):
```
./LICENSE
./MANIFEST.in
./Makefile
./README.md
./README.release.md
./appveyor.yml
./b2
./b2/__init__.py
./b2/__main__.py
./b2/account_info
./b2/account_info/__init__.py
./b2/account_info/abstract.py
./b2/account_info/exception.py
./b2/account_info/in_memory.py
./b2/account_info/sqlite_account_info.py
./b2/account_info/test_upload_url_concurrency.py
./b2/account_info/upload_url_pool.py
./b2/api.py
./b2/b2http.py
./b2/bounded_queue_executor.py
./b2/bucket.py
./b2/cache.py
./b2/console_tool.py
./b2/download_dest.py
./b2/exception.py
./b2/file_version.py
./b2/parse_args.py
./b2/part.py
./b2/progress.py
./b2/raw_api.py
./b2/raw_simulator.py
./b2/session.py
./b2/sync
./b2/sync/__init__.py
./b2/sync/action.py
./b2/sync/exception.py
./b2/sync/file.py
./b2/sync/folder.py
./b2/sync/folder_parser.py
./b2/sync/policy.py
./b2/sync/policy_manager.py
./b2/sync/report.py
./b2/sync/scan_policies.py
./b2/sync/sync.py
./b2/transferer.py
./b2/unfinished_large_file.py
./b2/upload_source.py
./b2/utils.py
./b2/version.py
./ci
./ci/appveyor
./ci/appveyor/install.ps1
./ci/appveyor/run_with_env.cmd
./contrib
./contrib/bash_completion
./contrib/bash_completion/b2
./contrib/color-b2-logs.sh
./contrib/debug_logs.ini
./doc
./doc/Makefile
./doc/bash_completion.md
./doc/source
./doc/source/b2.account_info.rst
./doc/source/b2.rst
./doc/source/b2.sync.rst
./doc/source/conf.py
./doc/source/index.rst
./doc/source/modules.rst
./pre-commit.sh
./requirements-setup.txt
./requirements-test.txt
./requirements.txt
./run-unit-tests.sh
./setup.cfg
./setup.py
./test
./test/__init__.py
./test/stub_account_info.py
./test/test_account_info.py
./test/test_api.py
./test/test_b2http.py
./test/test_base.py
./test/test_bounded_queue_executor.py
./test/test_bucket.py
./test/test_console_tool.py
./test/test_download_dest.py
./test/test_exception.py
./test/test_parse_args.py
./test/test_policy.py
./test/test_progress.py
./test/test_raw_api.py
./test/test_scan_policies.py
./test/test_session.py
./test/test_sync.py
./test/test_sync_report.py
./test/test_utils.py
./test_b2_command_line.py
```
Turn 1at 33 s553 tokens out4,327 prompt tokens
The user is reporting an issue where `b2.api.B2Api.get_bucket_by_name` fails when using bucket-scoped application keys.
The traceback shows that `get_bucket_by_name` calls `self.list_buckets()`, which in turn calls `self.check_bucket_restrictions(bucket_name)`.
However, `get_bucket_by_name` is calling `self.list_buckets()` without any arguments, and `list_buckets` probably calls `check_bucket_restrictions` with no bucket name or something that triggers a `RestrictedBucket` exception.

Let's look at the traceback again:
```
  File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 222, in get_bucket_by_name
    for bucket in self.list_buckets():
  File "/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py", line 84, in wrapper
    return function(*wrapee_args, **wrapee_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 251, in list_buckets
    self.check_bucket_restrictions(bucket_name)
  File "/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py", line 84, in wrapper
    return function(*wrapee_args, **wrapee_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 375, in check_bucket_restrictions
    raise RestrictedBucket(allowed_bucket_name)
 RestrictedBucket: Application key is restricted to bucket: pc-backup
```

Wait, `B2Api.get_bucket_by_name(bucket_name)` is supposed to get a bucket by name.
If the application key is restricted to a specific bucket, calling `list_buckets()` (which lists all buckets the account has access to) will fail if the key is restricted to only one bucket and the API call doesn't specify it.

Let's examine `b2/api.py`.
TOOL CALL · run_command
{
  "command": "grep -rn --include=\"*.py\" \"get_bucket_by_name\" ."
}
Result of run_command 2,629 characters
{
  "status": "ok",
  "stdout": "./test/test_console_tool.py:388:        bucket = self.b2_api.get_bucket_by_name('my-bucket')\n./test/test_console_tool.py:395:        bucket = self.b2_api.get_bucket_by_name('my-bucket')\n./test/test_console_tool.py:603:        bucket = self.b2_api.get_bucket_by_name('my-bucket')\n./test/test_console_tool.py:610:        bucket = self.b2_api.get_bucket_by_name('my-bucket')\n./test/test_console_tool.py:794:        bucket = self.b2_api.get_bucket_by_name('my-bucket')\n./test/test_console_tool.py:829:        bucket = self.b2_api.get_bucket_by_name('my-bucket')\n./test/test_console_tool.py:873:        bucket = self.b2_api.get_bucket_by_name('my-bucket')\n./test/test_console_tool.py:913:        bucket = self.b2_api.get_bucket_by_name('my-bucket')\n./test/test_console_tool.py:1070:        bucket = self.b2_api.get_bucket_by_name('my-bucket')\n./test/test_policy.py:69:        api.get_bucket_by_name.return_value = bucket\n./test/test_sync.py:248:        self.api.get_bucket_by_name.return_value = self.bucket\n./b2/api.py:206:    def get_bucket_by_name(self, bucket_name):\n./b2/api.py:263:                bucket_id = self.get_bucket_by_name(bucket_name).id_\n./b2/raw_simulator.py:709:            bucket = self._get_bucket_by_name(bucket_name)\n./b2/raw_simulator.py:924:    def _get_bucket_by_name(self, bucket_name):\n./b2/sync/folder.py:230:        self.bucket = api.get_bucket_by_name(bucket_name)\n./b2/console_tool.py:299:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:405:            bucket_id_or_none = self.api.get_bucket_by_name(args.bucket).id_\n./b2/console_tool.py:433:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:529:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:656:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:691:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:733:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:779:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:802:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:932:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:983:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:1236:        bucket = self.api.get_bucket_by_name(args.bucketName)\n./b2/console_tool.py:1303:        bucket = self.api.get_bucket_by_name(args.bucketName)\n",
  "stderr": "",
  "exit_code": 0
}
Generated tokens 553 tokens · stopped: STOP
<|channel>thought The user is reporting an issue where `b2.api.B2Api.get_bucket_by_name` fails when using bucket-scoped application keys. The traceback shows that `get_bucket_by_name` calls `self.list_buckets()`, which in turn calls `self.check_bucket_restrictions(bucket_name)`. However, `get_bucket_by_name` is calling `self.list_buckets()` without any arguments, and `list_buckets` probably calls `check_bucket_restrictions` with no bucket name or something that triggers a `RestrictedBucket` exception. Let's look at the traceback again: ``` File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 222, in get_bucket_by_name for bucket in self.list_buckets(): File "/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py", line 84, in wrapper return function(*wrapee_args, **wrapee_kwargs) File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 251, in list_buckets self.check_bucket_restrictions(bucket_name) File "/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py", line 84, in wrapper return function(*wrapee_args, **wrapee_kwargs) File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 375, in check_bucket_restrictions raise RestrictedBucket(allowed_bucket_name) RestrictedBucket: Application key is restricted to bucket: pc-backup ``` Wait, `B2Api.get_bucket_by_name(bucket_name)` is supposed to get a bucket by name. If the application key is restricted to a specific bucket, calling `list_buckets()` (which lists all buckets the account has access to) will fail if the key is restricted to only one bucket and the API call doesn't specify it. Let's examine `b2/api.py`.<channel|><|tool_call>call:run_command{command:<|"|>grep -rn --include="*.py" "get_bucket_by_name" .<|"|>}<tool_call|><|tool_response>
Turn 2at 39 s99 tokens out5,960 prompt tokens
Okay, the target function is `b2.api.B2Api.get_bucket_by_name` in `b2/api.py`.

Let's read `b2/api.py` around line 206 and the `list_buckets` method.
TOOL CALL · read_file
{
  "end_line": 400,
  "filepath": "b2/api.py",
  "start_line": 200
}
Result of read_file 6,531 characters
{
  "status": "ok",
  "filepath": "b2/api.py",
  "content": "        )\n        return self.transferer.download_file_from_url(url, download_dest, progress_listener, range_)\n\n    def get_bucket_by_id(self, bucket_id):\n        return Bucket(self, bucket_id)\n\n    def get_bucket_by_name(self, bucket_name):\n        \"\"\"\n        Returns the bucket_id for the given bucket_name.\n\n        If we don't already know it from the cache, try fetching it from\n        the B2 service.\n        \"\"\"\n        # If we can get it from the stored info, do that.\n        self.check_bucket_restrictions(bucket_name)\n        id_ = self.cache.get_bucket_id_or_none_from_bucket_name(bucket_name)\n        if id_ is not None:\n            return Bucket(self, id_, name=bucket_name)\n\n        for bucket in self.list_buckets():\n            if bucket.name == bucket_name:\n                return bucket\n        raise NonExistentBucket(bucket_name)\n\n    def delete_bucket(self, bucket):\n        \"\"\"\n        Deletes the bucket remotely.\n        For legacy reasons it returns whatever server sends in response,\n        but API user should not rely on the response: if it doesn't raise\n        an exception, it means that the operation was a success\n        \"\"\"\n        account_id = self.account_info.get_account_id()\n        return self.session.delete_bucket(account_id, bucket.id_)\n\n    def list_buckets(self, bucket_name=None):\n        \"\"\"\n        Calls b2_list_buckets and returns a list of buckets.\n\n        When no bucket name is specified, returns *all* of the buckets\n        in the account.  When a bucket name is given, returns just that\n        bucket.  When authorized with an application key restricted to\n        one bucket, you must specify the bucket name, or the request\n        will be unauthorized.\n\n        :param bucket_name: Optional: the name of the one bucket to return.\n        :return: A list of Bucket objects.\n        \"\"\"\n        account_id = self.account_info.get_account_id()\n        self.check_bucket_restrictions(bucket_name)\n\n        # TEMPORARY work around until we fix the API endpoint bug that things requests\n        # with a bucket name are not authorized.  When it's fixed, well just pass the\n        # bucket name (or None) to the raw API.\n        if bucket_name is None:\n            bucket_id = None\n        else:\n            allowed = self.account_info.get_allowed()\n            if allowed['bucketId'] is not None:\n                # We just checked that if there is a bucket restriction we have a bucket name\n                # and it matches.  So if there's a restriction we know that's the bucket we're\n                # looking for.\n                bucket_id = allowed['bucketId']\n            else:\n                bucket_id = self.get_bucket_by_name(bucket_name).id_\n\n        response = self.session.list_buckets(account_id, bucket_id=bucket_id)\n        buckets = BucketFactory.from_api_response(self, response)\n\n        if bucket_name is not None:\n            # If a bucket_name is specified we don't clear the cache because the other buckets could still\n            # be valid. So we save the one bucket returned from the list_buckets call.\n            for bucket in buckets:\n                self.cache.save_bucket(bucket)\n        else:\n            # Otherwise we want to clear the cache and save the buckets returned from list_buckets\n            # since we just got a new list of all the buckets for this account.\n            self.cache.set_bucket_name_cache(buckets)\n        return buckets\n\n    def list_parts(self, file_id, start_part_number=None, batch_size=None):\n        \"\"\"\n        Generator that yields a Part for each of the parts that have been uploaded.\n\n        :param file_id: the ID of the large file that is not finished\n        :param start_part_number: the first part number to return.  defaults to the first part.\n        :param batch_size: the number of parts to fetch at a time from the server\n        \"\"\"\n        batch_size = batch_size or 100\n        while True:\n            response = self.session.list_parts(file_id, start_part_number, batch_size)\n            for part_dict in response['parts']:\n                yield PartFactory.from_list_parts_dict(part_dict)\n            start_part_number = response.get('nextPartNumber')\n            if start_part_number is None:\n                break\n\n    # delete/cancel\n    def cancel_large_file(self, file_id):\n        response = self.session.cancel_large_file(file_id)\n        return FileVersionInfoFactory.from_cancel_large_file_response(response)\n\n    def delete_file_version(self, file_id, file_name):\n        # filename argument is not first, because one day it may become optional\n        response = self.session.delete_file_version(file_id, file_name)\n        assert response['fileId'] == file_id\n        assert response['fileName'] == file_name\n        return FileIdAndName(file_id, file_name)\n\n    # download\n    def get_download_url_for_fileid(self, file_id):\n        url = url_for_api(self.account_info, 'b2_download_file_by_id')\n        return '%s?fileId=%s' % (url, file_id)\n\n    def get_download_url_for_file_name(self, bucket_name, file_name):\n        \"\"\"\n        Returns a URL to download the given file by name.\n        \"\"\"\n        self.check_bucket_restrictions(bucket_name)\n        return '%s/file/%s/%s' % (\n            self.account_info.get_download_url(), bucket_name, b2_url_encode(file_name)\n        )\n\n    # keys\n    def create_key(\n        self, capabilities, key_name, valid_duration_seconds=None, bucket_id=None, name_prefix=None\n    ):\n        account_id = self.account_info.get_account_id()\n\n        response = self.session.create_key(\n            account_id,\n            capabilities=capabilities,\n            key_name=key_name,\n            valid_duration_seconds=valid_duration_seconds,\n            bucket_id=bucket_id,\n            name_prefix=name_prefix\n        )\n\n        assert set(response['capabilities']) == set(capabilities)\n        assert response['keyName'] == key_name\n\n        return response\n\n    def delete_key(self, application_key_id):\n\n        response = self.session.delete_key(application_key_id=application_key_id)\n        return response\n\n    def list_keys(self, start_application_key_id=None):\n        account_id = self.account_info.get_account_id()\n",
  "start_line": 200,
  "end_line": 349,
  "total_lines": 372,
  "is_truncated": true
}
Generated tokens 99 tokens · stopped: STOP
Okay, the target function is `b2.api.B2Api.get_bucket_by_name` in `b2/api.py`. Let's read `b2/api.py` around line 206 and the `list_buckets` method. <channel|><|tool_call>call:read_file{end_line:400,filepath:<|"|>b2/api.py<|"|>,start_line:200}<tool_call|><|tool_response>
Turn 3at 43 s51 tokens out7,900 prompt tokens
And let's see `check_bucket_restrictions`.
TOOL CALL · read_file
{
  "end_line": 400,
  "filepath": "b2/api.py",
  "start_line\"": 350
}
Result of read_file 5,966 characters
{
  "status": "ok",
  "filepath": "b2/api.py",
  "content": "######################################################################\n#\n# File: b2/api.py\n#\n# Copyright 2018 Backblaze Inc. All Rights Reserved.\n#\n# License https://www.backblaze.com/using_b2_code.html\n#\n######################################################################\n\nimport six\n\nfrom .account_info.sqlite_account_info import SqliteAccountInfo\nfrom .account_info.exception import MissingAccountData\nfrom .b2http import B2Http\nfrom .bucket import Bucket, BucketFactory\nfrom .cache import AuthInfoCache, DummyCache\nfrom .transferer import Transferer\nfrom .exception import NonExistentBucket, RestrictedBucket\nfrom .file_version import FileVersionInfoFactory, FileIdAndName\nfrom .part import PartFactory\nfrom .raw_api import B2RawApi\nfrom .session import B2Session\nfrom .utils import B2TraceMeta, b2_url_encode, limit_trace_arguments\n\ntry:\n    import concurrent.futures as futures\nexcept ImportError:\n    import futures\n\n\ndef url_for_api(info, api_name):\n    if api_name in ['b2_download_file_by_id']:\n        base = info.get_download_url()\n    else:\n        base = info.get_api_url()\n    return base + '/b2api/v1/' + api_name\n\n\n@six.add_metaclass(B2TraceMeta)\nclass B2Api(object):\n    \"\"\"\n    Provides file-level access to B2 services.\n\n    While B2RawApi provides direct access to the B2 web APIs, this\n    class handles several things that simplify the task of uploading\n    and downloading files:\n      - re-acquires authorization tokens when they expire\n      - retrying uploads when an upload URL is busy\n      - breaking large files into parts\n      - emulating a directory structure (B2 buckets are flat)\n\n    Adds an object-oriented layer on top of the raw API, so that\n    buckets and files returned are Python objects with accessor\n    methods.\n\n    Also,  keeps a cache of information needed to access the service,\n    such as auth tokens and upload URLs.\n    \"\"\"\n\n    def __init__(self, account_info=None, cache=None, raw_api=None, max_upload_workers=10):\n        \"\"\"\n        Initializes the API using the given account info.\n        :param account_info:\n        :param cache:\n        :param raw_api:\n        :return:\n        \"\"\"\n        self.raw_api = raw_api or B2RawApi(B2Http())\n        if account_info is None:\n            account_info = SqliteAccountInfo()\n            if cache is None:\n                cache = AuthInfoCache(account_info)\n        self.session = B2Session(self, self.raw_api)\n        self.transferer = Transferer(self.session, account_info)\n        self.account_info = account_info\n        if cache is None:\n            cache = DummyCache()\n        self.cache = cache\n        self.upload_executor = None\n        self.max_workers = max_upload_workers\n\n    def set_thread_pool_size(self, max_workers):\n        \"\"\"\n        Sets the size of the thread pool to use for uploads and downloads.\n\n        Must be called before any work starts, or the thread pool will get\n        the default size of 1.\n        \"\"\"\n        if self.upload_executor is not None:\n            raise Exception('thread pool already created')\n        self.max_workers = max_workers\n\n    def get_thread_pool(self):\n        \"\"\"\n        Returns the thread pool executor to use for uploads and downloads.\n        \"\"\"\n        if self.upload_executor is None:\n            self.upload_executor = futures.ThreadPoolExecutor(max_workers=self.max_workers)\n        return self.upload_executor\n\n    def authorize_automatically(self):\n        try:\n            self.authorize_account(\n                self.account_info.get_realm(),\n                self.account_info.get_account_id(),\n                self.account_info.get_application_key(),\n            )\n        except MissingAccountData:\n            return False\n        return True\n\n    @limit_trace_arguments(only=('self', 'realm'))\n    def authorize_account(self, realm, account_id_or_key_id, application_key):\n        # Clean up any previous account info if it was for a different account.\n        try:\n            old_account_id = self.account_info.get_account_id()\n            old_realm = self.account_info.get_realm()\n            if account_id_or_key_id != old_account_id or realm != old_realm:\n                self.cache.clear()\n        except MissingAccountData:\n            self.cache.clear()\n\n        # Authorize\n        realm_url = self.account_info.REALM_URLS[realm]\n        response = self.raw_api.authorize_account(realm_url, account_id_or_key_id, application_key)\n        allowed = response['allowed']\n\n        # If there is a bucket restriction, get the name of the bucket.\n        # And, if we have a list of the one allowed bucket, go ahead and\n        # save it.\n        if 'listBuckets' in allowed['capabilities']:\n            if allowed['bucketId'] is not None:\n                allowed_bucket_response = self.raw_api.list_buckets(\n                    api_url=response['apiUrl'],\n                    account_auth_token=response['authorizationToken'],\n                    account_id=response['accountId'],\n                    bucket_id=allowed['bucketId'],\n                )\n                allowed_bucket_list = allowed_bucket_response['buckets']\n                allowed_bucket_count = len(allowed_bucket_list)\n                assert allowed_bucket_count in [0, 1]\n                if allowed_bucket_count == 0:\n                    # bucket has been deleted since the key was made\n                    allowed['bucketName'] = None\n                else:\n                    allowed['bucketName'] = allowed_bucket_list[0]['bucketName']\n                    self.cache.set_bucket_name_cache(\n                        BucketFactory.from_api_response(self, allowed_bucket_response)\n                    )",
  "start_line": 1,
  "end_line": 150,
  "total_lines": 372,
  "is_truncated": true
}
Generated tokens 51 tokens · stopped: STOP
And let's see `check_bucket_restrictions`. <channel|><|tool_call>call:read_file{end_line:400,filepath:<|"|>b2/api.py<|"|>,start_line": 350}<tool_call|><|tool_response>
Turn 4at 57 s182 tokens out9,582 prompt tokens
Wait, I read the beginning of the file. I need to read `check_bucket_restrictions`. I'll search for it.
The previous `read_file` (from 200 to 400) didn't show `check_bucket_restrictions`?
Wait, I see it in `get_bucket_by_name`: `self.check_bucket_restrictions(bucket_name)`.
And in `list_buckets`: `self.check_bucket_restrictions(bucket_name)`.

Let me find where `check_bucket_restrictions` is defined. It must be after `list_buckets`.
`list_buckets` was around line 240.
TOOL CALL · run_command
{
  "command": "grep -n \"def check_bucket_restrictions\" b2/api.py"
}
Result of run_command 119 characters
{
  "status": "ok",
  "stdout": "359:    def check_bucket_restrictions(self, bucket_name):\n",
  "stderr": "",
  "exit_code": 0
}
Generated tokens 182 tokens · stopped: STOP
Wait, I read the beginning of the file. I need to read `check_bucket_restrictions`. I'll search for it. The previous `read_file` (from 200 to 400) didn't show `check_bucket_restrictions`? Wait, I see it in `get_bucket_by_name`: `self.check_bucket_restrictions(bucket_name)`. And in `list_buckets`: `self.check_bucket_restrictions(bucket_name)`. Let me find where `check_bucket_restrictions` is defined. It must be after `list_buckets`. `list_buckets` was around line 240.<channel|><|tool_call>call:run_command{command:<|"|>grep -n "def check_bucket_restrictions" b2/api.py<|"|>}<tool_call|><|tool_response>
Turn 5at 60 s57 tokens out9,822 prompt tokens
Ah, it's at line 359. I'll read around there.
TOOL CALL · read_file
{
  "end_line": 380,
  "filepath": "b2/api.py",
  "start_line\"": 350
}
Result of read_file 5,966 characters
{
  "status": "ok",
  "filepath": "b2/api.py",
  "content": "######################################################################\n#\n# File: b2/api.py\n#\n# Copyright 2018 Backblaze Inc. All Rights Reserved.\n#\n# License https://www.backblaze.com/using_b2_code.html\n#\n######################################################################\n\nimport six\n\nfrom .account_info.sqlite_account_info import SqliteAccountInfo\nfrom .account_info.exception import MissingAccountData\nfrom .b2http import B2Http\nfrom .bucket import Bucket, BucketFactory\nfrom .cache import AuthInfoCache, DummyCache\nfrom .transferer import Transferer\nfrom .exception import NonExistentBucket, RestrictedBucket\nfrom .file_version import FileVersionInfoFactory, FileIdAndName\nfrom .part import PartFactory\nfrom .raw_api import B2RawApi\nfrom .session import B2Session\nfrom .utils import B2TraceMeta, b2_url_encode, limit_trace_arguments\n\ntry:\n    import concurrent.futures as futures\nexcept ImportError:\n    import futures\n\n\ndef url_for_api(info, api_name):\n    if api_name in ['b2_download_file_by_id']:\n        base = info.get_download_url()\n    else:\n        base = info.get_api_url()\n    return base + '/b2api/v1/' + api_name\n\n\n@six.add_metaclass(B2TraceMeta)\nclass B2Api(object):\n    \"\"\"\n    Provides file-level access to B2 services.\n\n    While B2RawApi provides direct access to the B2 web APIs, this\n    class handles several things that simplify the task of uploading\n    and downloading files:\n      - re-acquires authorization tokens when they expire\n      - retrying uploads when an upload URL is busy\n      - breaking large files into parts\n      - emulating a directory structure (B2 buckets are flat)\n\n    Adds an object-oriented layer on top of the raw API, so that\n    buckets and files returned are Python objects with accessor\n    methods.\n\n    Also,  keeps a cache of information needed to access the service,\n    such as auth tokens and upload URLs.\n    \"\"\"\n\n    def __init__(self, account_info=None, cache=None, raw_api=None, max_upload_workers=10):\n        \"\"\"\n        Initializes the API using the given account info.\n        :param account_info:\n        :param cache:\n        :param raw_api:\n        :return:\n        \"\"\"\n        self.raw_api = raw_api or B2RawApi(B2Http())\n        if account_info is None:\n            account_info = SqliteAccountInfo()\n            if cache is None:\n                cache = AuthInfoCache(account_info)\n        self.session = B2Session(self, self.raw_api)\n        self.transferer = Transferer(self.session, account_info)\n        self.account_info = account_info\n        if cache is None:\n            cache = DummyCache()\n        self.cache = cache\n        self.upload_executor = None\n        self.max_workers = max_upload_workers\n\n    def set_thread_pool_size(self, max_workers):\n        \"\"\"\n        Sets the size of the thread pool to use for uploads and downloads.\n\n        Must be called before any work starts, or the thread pool will get\n        the default size of 1.\n        \"\"\"\n        if self.upload_executor is not None:\n            raise Exception('thread pool already created')\n        self.max_workers = max_workers\n\n    def get_thread_pool(self):\n        \"\"\"\n        Returns the thread pool executor to use for uploads and downloads.\n        \"\"\"\n        if self.upload_executor is None:\n            self.upload_executor = futures.ThreadPoolExecutor(max_workers=self.max_workers)\n        return self.upload_executor\n\n    def authorize_automatically(self):\n        try:\n            self.authorize_account(\n                self.account_info.get_realm(),\n                self.account_info.get_account_id(),\n                self.account_info.get_application_key(),\n            )\n        except MissingAccountData:\n            return False\n        return True\n\n    @limit_trace_arguments(only=('self', 'realm'))\n    def authorize_account(self, realm, account_id_or_key_id, application_key):\n        # Clean up any previous account info if it was for a different account.\n        try:\n            old_account_id = self.account_info.get_account_id()\n            old_realm = self.account_info.get_realm()\n            if account_id_or_key_id != old_account_id or realm != old_realm:\n                self.cache.clear()\n        except MissingAccountData:\n            self.cache.clear()\n\n        # Authorize\n        realm_url = self.account_info.REALM_URLS[realm]\n        response = self.raw_api.authorize_account(realm_url, account_id_or_key_id, application_key)\n        allowed = response['allowed']\n\n        # If there is a bucket restriction, get the name of the bucket.\n        # And, if we have a list of the one allowed bucket, go ahead and\n        # save it.\n        if 'listBuckets' in allowed['capabilities']:\n            if allowed['bucketId'] is not None:\n                allowed_bucket_response = self.raw_api.list_buckets(\n                    api_url=response['apiUrl'],\n                    account_auth_token=response['authorizationToken'],\n                    account_id=response['accountId'],\n                    bucket_id=allowed['bucketId'],\n                )\n                allowed_bucket_list = allowed_bucket_response['buckets']\n                allowed_bucket_count = len(allowed_bucket_list)\n                assert allowed_bucket_count in [0, 1]\n                if allowed_bucket_count == 0:\n                    # bucket has been deleted since the key was made\n                    allowed['bucketName'] = None\n                else:\n                    allowed['bucketName'] = allowed_bucket_list[0]['bucketName']\n                    self.cache.set_bucket_name_cache(\n                        BucketFactory.from_api_response(self, allowed_bucket_response)\n                    )",
  "start_line": 1,
  "end_line": 150,
  "total_lines": 372,
  "is_truncated": true
}
Generated tokens 57 tokens · stopped: STOP
Ah, it's at line 359. I'll read around there. <channel|><|tool_call>call:read_file{end_line:380,filepath:<|"|>b2/api.py<|"|>,start_line":350}<tool_call|><|tool_response>
Turn 6at 73 s194 tokens out11,511 prompt tokens
I keep requesting line ranges that are being truncated or not what I want. I specified `start_line":350` and `end_line":380` but it returned from line 1? Ah, I see, I probably had a typo or the `read_file` implementation is acting up if I don't use the right format. Wait, I used `start_line":350` in the call, but look at the response, it says `start_line": 1, "end_line": 150`.

Wait, I see what happened. I might have passed `start_line` as a string or something? No, the tool call looks OK.

Let me try again, carefully.
TOOL CALL · read_file
{
  "end_line": 380,
  "filepath": "b2/api.py",
  "start_line": 350
}
Result of read_file 1,056 characters
{
  "status": "ok",
  "filepath": "b2/api.py",
  "content": "        return self.session.list_keys(\n            account_id, max_key_count=1000, start_application_key_id=start_application_key_id\n        )\n\n    # other\n    def get_file_info(self, file_id):\n        \"\"\" legacy interface which just returns whatever remote API returns \"\"\"\n        return self.session.get_file_info(file_id)\n\n    def check_bucket_restrictions(self, bucket_name):\n        \"\"\"\n        Checks to see if the allowed field from authorize-account\n        has a bucket restriction.\n\n        If it does, does the bucket_name for a given api call match that.\n        If not it raises a RestrictedBucket error.\n        \"\"\"\n        allowed = self.account_info.get_allowed()\n        allowed_bucket_name = allowed['bucketName']\n\n        if allowed_bucket_name is not None:\n            if allowed_bucket_name != bucket_name:\n                raise RestrictedBucket(allowed_bucket_name)",
  "start_line": 350,
  "end_line": 372,
  "total_lines": 372,
  "is_truncated": false
}
Generated tokens 194 tokens · stopped: STOP
I keep requesting line ranges that are being truncated or not what I want. I specified `start_line":350` and `end_line":380` but it returned from line 1? Ah, I see, I probably had a typo or the `read_file` implementation is acting up if I don't use the right format. Wait, I used `start_line":350` in the call, but look at the response, it says `start_line": 1, "end_line": 150`. Wait, I see what happened. I might have passed `start_line` as a string or something? No, the tool call looks OK. Let me try again, carefully.<channel|><|tool_call>call:read_file{end_line:380,filepath:<|"|>b2/api.py<|"|>,start_line:350}<tool_call|><|tool_response>
Turn 7at 281 s3,843 tokens out12,028 prompt tokens
Okay, now I have it:
```python
    def check_bucket_restrictions(self, bucket_name):
        """
        Checks to see if the allowed field from authorize-account
        has a bucket restriction.

        If it does, does the bucket_name for a given api call match that.
        If not it raises a RestrictedBucket error.
        """
        allowed = self.account_info.get_allowed()
        allowed_bucket_name = allowed['bucketName']

        if allowed_bucket_name is not None:
            if allowed_bucket_name != bucket_name:
                raise RestrictedBucket(allowed_bucket_name)
```

Now let's look at `get_bucket_by_name` again:
```python
    def get_bucket_by_name(self, bucket_name):
        """
        Returns the bucket_id for the given bucket_name.

        If we don't already know it from the cache, try fetching it from
        the B2 service.
        """
        # If we can get it from the stored info, do that.
        self.check_bucket_restrictions(bucket_name)
        id_ = self.cache.get_bucket_id_or_none_from_bucket_name(bucket_name)
        if id_ is not None:
            return Bucket(self, id_, name=bucket_name)

        for bucket in self.list_buckets():
            if bucket.name == bucket_name:
                return bucket
        raise NonExistentBucket(bucket_name)
```

And `list_buckets`:
```python
    def list_buckets(self, bucket_name=None):
        """
        Calls b2_list_buckets and returns a list of buckets.

        When no bucket name is specified, returns *all* of the buckets
        in the account.  When a bucket name is given, returns just that
        bucket.  When authorized with an application key restricted to
        one bucket, you must specify the bucket name, or the request
        will be unauthorized.

        :param bucket_name: Optional: the name of the one bucket to return.
        :return: A list of Bucket objects.
        """
        account_id = self.account_info.get_account_id()
        self.check_bucket_restrictions(bucket_name)
        # ...
```

The issue is that `get_bucket_by_name(bucket_name)` calls `self.list_buckets()`.
`self.list_buckets()` defaults `bucket_name` to `None`.
Then `list_buckets` calls `self.check_bucket_restrictions(None)`.
In `check_bucket_restrictions(None)`, if `allowed_bucket_name` is not None (meaning there is a restriction), it check if `allowed_bucket_name != None`. This is true, so it raises `RestrictedBucket(allowed_bucket_name)`.

To fix this, `get_bucket_by_name(bucket_name)` should call `self.list_buckets(bucket_name)`.

Wait, if I call `list_buckets(bucket_name)`, it returns a list of buckets.
```python
        for bucket in self.list_buckets():
            if bucket.name == bucket_name:
                return bucket
```
If I change it to:
```python
        for bucket in self.list_buckets(bucket_name):
            if bucket.name == bucket_name:
                return bucket
```
Then `list_buckets(bucket_name)` will be called, it will call `check_bucket_restrictions(bucket_name)`, which will pass if `bucket_name` matches the restriction.

One more thing: let's check if `list_buckets(bucket_name)` actually returns the bucket with that name.
In `list_buckets(bucket_name)`:
```python
        if bucket_name is None:
            bucket_id = None
        else:
            allowed = self.account_info.get_allowed()
            if allowed['bucketId'] is not None:
                # We just checked that if there is a bucket restriction we have a bucket name
                # and it matches.  So if there's a restriction we know that's the bucket we're
                # looking for.
                bucket_id = allowed['bucketId']
            else:
                bucket_id = self.get_bucket_by_name(bucket_name).id_
```
Wait! If `allowed['bucketId']` is None (no restriction), it calls `self.get_bucket_by_name(bucket_name).id_`!
This is a recursive call!
`get_bucket_by_name(bucket_name)` -> `list_buckets(bucket_name)` -> `get_bucket_by_name(bucket_name)`.
This will cause a recursion error if `bucket_id` is not in cache and no bucket restriction exists.

Let's re-examine `list_buckets` implementation.
```python
    def list_buckets(self, bucket_name=None):
        # ...
        account_id = self.account_info.get_account_id()
        self.check_bucket_restrictions(bucket_name)

        # TEMPORARY work around until we fix the API endpoint bug that things requests
        # with a bucket name are not authorized.  When it's fixed, well just pass the
        # bucket name (or None) to the raw API.
        if bucket_name is None:
            bucket_id = None
        else:
            allowed = self.account_info.get_allowed()
            if allowed['bucketId'] is not None:
                # We just checked that if there is a bucket restriction we have a bucket name
                # and it matches.  So if there's a restriction we know that's the bucket we're
                # looking for.
                bucket_id = allowed['bucketId']
            else:
                bucket_id = self.get_bucket_by_name(bucket_name).id_

        response = self.session.list_buckets(account_id, bucket_id=bucket_id)
        buckets = BucketFactory.from_api_response(self, response)
        # ...
```

Wait, if there's no bucket restriction (`allowed['bucketId']` is None), and I call `list_buckets(bucket_name)`, it calls `get_bucket_by_name(bucket_name).id_`.
And `get_bucket_by_name(bucket_name)` calls `list_buckets()` (without arguments).
`list_buckets()` calls `check_bucket_restrictions(None)`, which passes if there's no restriction.
Then `list_buckets()` calls `self.session.list_buckets(account_id, bucket_id=None)`, which returns all buckets.
`list_buckets()` then iterates and returns the list.
Then `get_bucket_by_name(bucket_name)` finds the bucket and returns it.
Then `list_buckets(bucket_name)` gets the `.id_` and calls `self.session.list_buckets(account_id, bucket_id=bucket_id)`.

So if there's no restriction, it's not a recursive loop that never ends, but it's inefficient.

But the core issue is when there IS a restriction.
If there is a restriction to `pc-backup`.
`get_bucket_by_name('pc-backup')` is called.
`check_bucket_restrictions('pc-backup')` passes.
Cache miss.
`list_buckets()` is called.
`check_bucket_restrictions(None)` is called.
`allowed_bucket_name` is `'pc-backup'`.
`'pc-backup' != None` is True.
`RestrictedBucket('pc-backup')` is raised.

So yes, `get_bucket_by_name` should call `list_buckets(bucket_name)`.

If I change `get_bucket_by_name` to call `list_buckets(bucket_name)`:
Case 1: Restriction to `pc-backup`, calling `get_bucket_by_name('pc-backup')`.
1. `check_bucket_restrictions('pc-backup')` passes.
2. Cache miss.
3. `list_buckets('pc-backup')` is called.
4. `check_bucket_restrictions('pc-backup')` passes.
5. `allowed['bucketId']` is not None. `bucket_id = allowed['bucketId']`.
6. `self.session.list_buckets(account_id, bucket_id=bucket_id)` returns the bucket.
7. Success.

Case 2: No restriction, calling `get_bucket_by_name('my-bucket')`.
1. `check_bucket_restrictions('my-bucket')` passes (no restriction).
2. Cache miss.
3. `list_buckets('my-bucket')` is called.
4. `check_bucket_restrictions('my-bucket')` passes.
5. `allowed['bucketId']` is None.
6. `self.get_bucket_by_name('my-bucket').id_` is called.
    a. `check_bucket_restrictions('my-bucket')` passes.
    b. Cache miss.
    c. `list_buckets()` is called (NO args).
        i. `check_bucket_restrictions(None)` passes.
        ii. `bucket_id = None`.
        iii. `self.session.list_buckets(account_id, bucket_id=None)` returns all buckets.
        iv. Returns list of buckets.
    d. `get_bucket_by_name` returns the bucket.
    e. `.id_` is returned.
7. `bucket_id` is now the ID of 'my-bucket'.
8. `self.session.list_buckets(account_id, bucket_id=bucket_id)` returns the bucket.
9. Success.

So the fix is indeed to pass `bucket_name` to `list_buckets` in `get_bucket_by_name`.

Let's verify if there are any other places where `list_buckets()` is called and might need `bucket_name`.

In `b2/api.py`, line 263:
```python
                bucket_id = self.get_bucket_by_name(bucket_name).id_
```
This one calls `get_bucket_by_name`, which we are fixing.

Let's create a reproduction script. Since I don't have a B2 account, I should mock it.
Wait, I can use `b2/raw_simulator.py` or just mock `B2Session`.

Actually, let's see if I can use the existing tests. `test/test_api.py` might have something.

But since I'm confident in theAnalysis, I'll just write a small test script that mocks `B2Session` and `AccountInfo`.

Wait, `B2Api` takes `account_info`. I can mock `account_info`.

```python
import unittest
from unittest.mock import MagicMock, patch
from b2.api import B2Api, RestrictedBucket, NonExistentBucket
from b2.bucket import Bucket

class MockAccountInfo:
    def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None):
        self.allowed_bucket_name = allowed_bucket_name
        self.allowed_bucket_id = allowed_bucket_id
    
    def get_account_id(self):
        return "account_id"
    
    def get_allowed(self):
        return {
            'bucketName': self.allowed_bucket_name,
            'bucketId': self.allowed_bucket_id
        }

class TestB2Api(unittest.TestCase):
    def test_get_bucket_by_name_restricted(self):
        # Application key is restricted to "pc-backup"
        account_info = MockAccountInfo(allowed_bucket_name="pc-backup", allowed_bucket_id="bucket_id_pc_backup")
        
        with patch('b2.api.B2Session') as MockSession:
            instance = MockSession.return_value
            # list_buckets returns a list of buckets. 
            # If bucket_id is provided, it returns just that one.
            def side_effect(account_id, bucket_id=None):
                if bucket_id == "bucket_id_pc_backup":
                    return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]}
                elif bucket_id is None:
                    return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]}
                return {'buckets': []}
            
            instance.list_buckets.side_effect = side_effect
            
            api = B2Api(account_info=account_info)
            # This should not raise RestrictedBucket
            bucket = api.get_bucket_by_name('pc-backup')
            self.assertEqual(bucket.name, 'pc-backup')

    def test_get_bucket_by_name_unrestricted(self):
        # No restriction
        account_info = MockAccountInfo(allowed_bucket_name=None, allowed_bucket_id=None)
        
        with patch('b2.api.B2Session') as MockSession:
            instance = MockSession.return_value
            def side_effect(account_id, bucket_id=None):
                return {'buckets': [{'bucketName': 'my-bucket', 'bucketId': 'bucket_id_my_bucket'}]}
            
            instance.list_buckets.side_effect = side_effect
            
            api = B2Api(account_info=account_info)
            bucket = api.get_bucket_by_name('my-bucket')
            self.assertEqual(bucket.name, 'my-bucket')

if __name__ == '__main__':
    unittest.main()
```

Let's try to run this reproduction.
TOOL CALL · run_command
{
  "command": "python3 - <<'PY'\nimport unittest\nfrom unittest.mock import MagicMock, patch\nfrom b2.api import B2Api, RestrictedBucket, NonExistentBucket\nfrom b2.bucket import Bucket\n\nclass MockAccountInfo:\n    def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None):\n        self.allowed_bucket_name = allowed_bucket_name\n        self.allowed_bucket_id = allowed_bucket_id\n    \n    def get_account_id(self):\n        return \"account_id\"\n    \n    def get_allowed(self):\n        return {\n            'bucketName': self.allowed_bucket_name,\n            'bucketId': self.allowed_bucket_id\n        }\n\nclass TestB2Api(unittest.TestCase):\n    def test_get_bucket_by_name_restricted(self):\n        # Application key is restricted to \"pc-backup\"\n        account_info = MockAccountInfo(allowed_bucket_name=\"pc-backup\", allowed_bucket_id=\"bucket_id_pc_backup\")\n        \n        with patch('b2.api.B2Session') as MockSession:\n            instance = MockSession.return_value\n            # list_buckets returns a list of buckets. \n            # If bucket_id is provided, it returns just that one.\n            def side_effect(account_id, bucket_id=None):\n                if bucket_id == \"bucket_id_pc_backup\":\n                    return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]}\n                elif bucket_id is None:\n                    # If it's restricted and bucket_id is None, the server would return 403, \n                    # but the library should raise RestrictedBucket locally.\n                    # However, our mock should probably reflect what the library expects.\n                    return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]}\n                return {'buckets': []}\n            \n            instance.list_buckets.side_effect = side_effect\n            \n            api = B2Api(account_info=account_info)\n            try:\n                bucket = api.get_bucket_by_name('pc-backup')\n                print(\"SUCCESS\")\n            except RestrictedBucket as e:\n                print(f\"FAILED: RestrictedBucket: {e}\")\n            except Exception as e:\n                print(f\"FAILED: {type(e).__name__}: {e}\")\n\nif __name__ == '__main__':\n    unittest.main(argv=['first-arg-is-ignored'], exit=False)\nPY\n"
}
Result of run_command 241 characters
{
  "status": "ok",
  "stdout": "FAILED: RestrictedBucket: Application key is restricted to bucket: pc-backup\n",
  "stderr": ".\n----------------------------------------------------------------------\nRan 1 test in 0.000s\n\nOK\n",
  "exit_code": 0
}
Generated tokens 3,843 tokens · stopped: STOP
Okay, now I have it: ```python def check_bucket_restrictions(self, bucket_name): """ Checks to see if the allowed field from authorize-account has a bucket restriction. If it does, does the bucket_name for a given api call match that. If not it raises a RestrictedBucket error. """ allowed = self.account_info.get_allowed() allowed_bucket_name = allowed['bucketName'] if allowed_bucket_name is not None: if allowed_bucket_name != bucket_name: raise RestrictedBucket(allowed_bucket_name) ``` Now let's look at `get_bucket_by_name` again: ```python def get_bucket_by_name(self, bucket_name): """ Returns the bucket_id for the given bucket_name. If we don't already know it from the cache, try fetching it from the B2 service. """ # If we can get it from the stored info, do that. self.check_bucket_restrictions(bucket_name) id_ = self.cache.get_bucket_id_or_none_from_bucket_name(bucket_name) if id_ is not None: return Bucket(self, id_, name=bucket_name) for bucket in self.list_buckets(): if bucket.name == bucket_name: return bucket raise NonExistentBucket(bucket_name) ``` And `list_buckets`: ```python def list_buckets(self, bucket_name=None): """ Calls b2_list_buckets and returns a list of buckets. When no bucket name is specified, returns *all* of the buckets in the account. When a bucket name is given, returns just that bucket. When authorized with an application key restricted to one bucket, you must specify the bucket name, or the request will be unauthorized. :param bucket_name: Optional: the name of the one bucket to return. :return: A list of Bucket objects. """ account_id = self.account_info.get_account_id() self.check_bucket_restrictions(bucket_name) # ... ``` The issue is that `get_bucket_by_name(bucket_name)` calls `self.list_buckets()`. `self.list_buckets()` defaults `bucket_name` to `None`. Then `list_buckets` calls `self.check_bucket_restrictions(None)`. In `check_bucket_restrictions(None)`, if `allowed_bucket_name` is not None (meaning there is a restriction), it check if `allowed_bucket_name != None`. This is true, so it raises `RestrictedBucket(allowed_bucket_name)`. To fix this, `get_bucket_by_name(bucket_name)` should call `self.list_buckets(bucket_name)`. Wait, if I call `list_buckets(bucket_name)`, it returns a list of buckets. ```python for bucket in self.list_buckets(): if bucket.name == bucket_name: return bucket ``` If I change it to: ```python for bucket in self.list_buckets(bucket_name): if bucket.name == bucket_name: return bucket ``` Then `list_buckets(bucket_name)` will be called, it will call `check_bucket_restrictions(bucket_name)`, which will pass if `bucket_name` matches the restriction. One more thing: let's check if `list_buckets(bucket_name)` actually returns the bucket with that name. In `list_buckets(bucket_name)`: ```python if bucket_name is None: bucket_id = None else: allowed = self.account_info.get_allowed() if allowed['bucketId'] is not None: # We just checked that if there is a bucket restriction we have a bucket name # and it matches. So if there's a restriction we know that's the bucket we're # looking for. bucket_id = allowed['bucketId'] else: bucket_id = self.get_bucket_by_name(bucket_name).id_ ``` Wait! If `allowed['bucketId']` is None (no restriction), it calls `self.get_bucket_by_name(bucket_name).id_`! This is a recursive call! `get_bucket_by_name(bucket_name)` -> `list_buckets(bucket_name)` -> `get_bucket_by_name(bucket_name)`. This will cause a recursion error if `bucket_id` is not in cache and no bucket restriction exists. Let's re-examine `list_buckets` implementation. ```python def list_buckets(self, bucket_name=None): # ... account_id = self.account_info.get_account_id() self.check_bucket_restrictions(bucket_name) # TEMPORARY work around until we fix the API endpoint bug that things requests # with a bucket name are not authorized. When it's fixed, well just pass the # bucket name (or None) to the raw API. if bucket_name is None: bucket_id = None else: allowed = self.account_info.get_allowed() if allowed['bucketId'] is not None: # We just checked that if there is a bucket restriction we have a bucket name # and it matches. So if there's a restriction we know that's the bucket we're # looking for. bucket_id = allowed['bucketId'] else: bucket_id = self.get_bucket_by_name(bucket_name).id_ response = self.session.list_buckets(account_id, bucket_id=bucket_id) buckets = BucketFactory.from_api_response(self, response) # ... ``` Wait, if there's no bucket restriction (`allowed['bucketId']` is None), and I call `list_buckets(bucket_name)`, it calls `get_bucket_by_name(bucket_name).id_`. And `get_bucket_by_name(bucket_name)` calls `list_buckets()` (without arguments). `list_buckets()` calls `check_bucket_restrictions(None)`, which passes if there's no restriction. Then `list_buckets()` calls `self.session.list_buckets(account_id, bucket_id=None)`, which returns all buckets. `list_buckets()` then iterates and returns the list. Then `get_bucket_by_name(bucket_name)` finds the bucket and returns it. Then `list_buckets(bucket_name)` gets the `.id_` and calls `self.session.list_buckets(account_id, bucket_id=bucket_id)`. So if there's no restriction, it's not a recursive loop that never ends, but it's inefficient. But the core issue is when there IS a restriction. If there is a restriction to `pc-backup`. `get_bucket_by_name('pc-backup')` is called. `check_bucket_restrictions('pc-backup')` passes. Cache miss. `list_buckets()` is called. `check_bucket_restrictions(None)` is called. `allowed_bucket_name` is `'pc-backup'`. `'pc-backup' != None` is True. `RestrictedBucket('pc-backup')` is raised. So yes, `get_bucket_by_name` should call `list_buckets(bucket_name)`. If I change `get_bucket_by_name` to call `list_buckets(bucket_name)`: Case 1: Restriction to `pc-backup`, calling `get_bucket_by_name('pc-backup')`. 1. `check_bucket_restrictions('pc-backup')` passes. 2. Cache miss. 3. `list_buckets('pc-backup')` is called. 4. `check_bucket_restrictions('pc-backup')` passes. 5. `allowed['bucketId']` is not None. `bucket_id = allowed['bucketId']`. 6. `self.session.list_buckets(account_id, bucket_id=bucket_id)` returns the bucket. 7. Success. Case 2: No restriction, calling `get_bucket_by_name('my-bucket')`. 1. `check_bucket_restrictions('my-bucket')` passes (no restriction). 2. Cache miss. 3. `list_buckets('my-bucket')` is called. 4. `check_bucket_restrictions('my-bucket')` passes. 5. `allowed['bucketId']` is None. 6. `self.get_bucket_by_name('my-bucket').id_` is called. a. `check_bucket_restrictions('my-bucket')` passes. b. Cache miss. c. `list_buckets()` is called (NO args). i. `check_bucket_restrictions(None)` passes. ii. `bucket_id = None`. iii. `self.session.list_buckets(account_id, bucket_id=None)` returns all buckets. iv. Returns list of buckets. d. `get_bucket_by_name` returns the bucket. e. `.id_` is returned. 7. `bucket_id` is now the ID of 'my-bucket'. 8. `self.session.list_buckets(account_id, bucket_id=bucket_id)` returns the bucket. 9. Success. So the fix is indeed to pass `bucket_name` to `list_buckets` in `get_bucket_by_name`. Let's verify if there are any other places where `list_buckets()` is called and might need `bucket_name`. In `b2/api.py`, line 263: ```python bucket_id = self.get_bucket_by_name(bucket_name).id_ ``` This one calls `get_bucket_by_name`, which we are fixing. Let's create a reproduction script. Since I don't have a B2 account, I should mock it. Wait, I can use `b2/raw_simulator.py` or just mock `B2Session`. Actually, let's see if I can use the existing tests. `test/test_api.py` might have something. But since I'm confident in theAnalysis, I'll just write a small test script that mocks `B2Session` and `AccountInfo`. Wait, `B2Api` takes `account_info`. I can mock `account_info`. ```python import unittest from unittest.mock import MagicMock, patch from b2.api import B2Api, RestrictedBucket, NonExistentBucket from b2.bucket import Bucket class MockAccountInfo: def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None): self.allowed_bucket_name = allowed_bucket_name self.allowed_bucket_id = allowed_bucket_id def get_account_id(self): return "account_id" def get_allowed(self): return { 'bucketName': self.allowed_bucket_name, 'bucketId': self.allowed_bucket_id } class TestB2Api(unittest.TestCase): def test_get_bucket_by_name_restricted(self): # Application key is restricted to "pc-backup" account_info = MockAccountInfo(allowed_bucket_name="pc-backup", allowed_bucket_id="bucket_id_pc_backup") with patch('b2.api.B2Session') as MockSession: instance = MockSession.return_value # list_buckets returns a list of buckets. # If bucket_id is provided, it returns just that one. def side_effect(account_id, bucket_id=None): if bucket_id == "bucket_id_pc_backup": return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]} elif bucket_id is None: return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]} return {'buckets': []} instance.list_buckets.side_effect = side_effect api = B2Api(account_info=account_info) # This should not raise RestrictedBucket bucket = api.get_bucket_by_name('pc-backup') self.assertEqual(bucket.name, 'pc-backup') def test_get_bucket_by_name_unrestricted(self): # No restriction account_info = MockAccountInfo(allowed_bucket_name=None, allowed_bucket_id=None) with patch('b2.api.B2Session') as MockSession: instance = MockSession.return_value def side_effect(account_id, bucket_id=None): return {'buckets': [{'bucketName': 'my-bucket', 'bucketId': 'bucket_id_my_bucket'}]} instance.list_buckets.side_effect = side_effect api = B2Api(account_info=account_info) bucket = api.get_bucket_by_name('my-bucket') self.assertEqual(bucket.name, 'my-bucket') if __name__ == '__main__': unittest.main() ``` Let's try to run this reproduction. <channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY' import unittest from unittest.mock import MagicMock, patch from b2.api import B2Api, RestrictedBucket, NonExistentBucket from b2.bucket import Bucket class MockAccountInfo: def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None): self.allowed_bucket_name = allowed_bucket_name self.allowed_bucket_id = allowed_bucket_id def get_account_id(self): return "account_id" def get_allowed(self): return { 'bucketName': self.allowed_bucket_name, 'bucketId': self.allowed_bucket_id } class TestB2Api(unittest.TestCase): def test_get_bucket_by_name_restricted(self): # Application key is restricted to "pc-backup" account_info = MockAccountInfo(allowed_bucket_name="pc-backup", allowed_bucket_id="bucket_id_pc_backup") with patch('b2.api.B2Session') as MockSession: instance = MockSession.return_value # list_buckets returns a list of buckets. # If bucket_id is provided, it returns just that one. def side_effect(account_id, bucket_id=None): if bucket_id == "bucket_id_pc_backup": return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]} elif bucket_id is None: # If it's restricted and bucket_id is None, the server would return 403, # but the library should raise RestrictedBucket locally. # However, our mock should probably reflect what the library expects. return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]} return {'buckets': []} instance.list_buckets.side_effect = side_effect api = B2Api(account_info=account_info) try: bucket = api.get_bucket_by_name('pc-backup') print("SUCCESS") except RestrictedBucket as e: print(f"FAILED: RestrictedBucket: {e}") except Exception as e: print(f"FAILED: {type(e).__name__}: {e}") if __name__ == '__main__': unittest.main(argv=['first-arg-is-ignored'], exit=False) PY <|"|>}<tool_call|><|tool_response>
Turn 8at 297 s251 tokens out15,955 prompt tokens
Wait, the output says `FAILED: RestrictedBucket: Application key is restricted to bucket: pc-backup` but then `Ran 1 test in 0.000s\n\nOK`. The `OK` is because I caught the exception and just printed it.

So my reproduction confirmed the bug!

Now I will apply the fix.

In `b2/api.py`:
```python
        for bucket in self.list_buckets():
            if bucket.name == bucket_name:
                return bucket
```
becoming:
```python
        for bucket in self.list_buckets(bucket_name):
            if bucket.name == bucket_name:
                return bucket
```

Let's do it.
TOOL CALL · edit_file
{
  "filepath": "b2/api.py",
  "new_string": "        for bucket in self.list_buckets(bucket_name):\n            if bucket.name == bucket_name:\n                return bucket",
  "old_string": "        for bucket in self.list_buckets():\n            if bucket.name == bucket_name:\n                return bucket"
}
Result of edit_file 485 characters
{
  "status": "ok",
  "filepath": "b2/api.py",
  "occurrences": 1,
  "strategy": "exact",
  "diff": "--- a/b2/api.py\n+++ b/b2/api.py\n@@ -216,7 +216,7 @@\n         if id_ is not None:\n             return Bucket(self, id_, name=bucket_name)\n \n-        for bucket in self.list_buckets():\n+        for bucket in self.list_buckets(bucket_name):\n             if bucket.name == bucket_name:\n                 return bucket\n         raise NonExistentBucket(bucket_name)\n",
  "is_truncated": false
}
Generated tokens 251 tokens · stopped: STOP
Wait, the output says `FAILED: RestrictedBucket: Application key is restricted to bucket: pc-backup` but then `Ran 1 test in 0.000s\n\nOK`. The `OK` is because I caught the exception and just printed it. So my reproduction confirmed the bug! Now I will apply the fix. In `b2/api.py`: ```python for bucket in self.list_buckets(): if bucket.name == bucket_name: return bucket ``` becoming: ```python for bucket in self.list_buckets(bucket_name): if bucket.name == bucket_name: return bucket ``` Let's do it. <channel|><|tool_call>call:edit_file{filepath:<|"|>b2/api.py<|"|>,new_string:<|"|> for bucket in self.list_buckets(bucket_name): if bucket.name == bucket_name: return bucket<|"|>,old_string:<|"|> for bucket in self.list_buckets(): if bucket.name == bucket_name: return bucket<|"|>}<tool_call|><|tool_response>
Turn 9at 367 s638 tokens out7,229 prompt tokens
Now let's run the reproduction script again to verify the fix.
TOOL CALL · run_command
{
  "command": "python3 - <<'PY'\nimport unittest\nfrom unittest.mock import MagicMock, patch\nfrom b2.api import B2Api, RestrictedBucket, NonExistentBucket\nfrom b2.bucket import Bucket\n\nclass MockAccountInfo:\n    def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None):\n        self.allowed_bucket_name = allowed_bucket_name\n        self.allowed_bucket_id = allowed_bucket_id\n    \n    def get_account_id(self):\n        return \"account_id\"\n    \n    def get_allowed(self):\n        return {\n            'bucketName': self.allowed_bucket_name,\n            'bucketId': self.allowed_bucket_id\n        }\n\nclass TestB2Api(unittest.TestCase):\n    def test_get_bucket_by_name_restricted(self):\n        # Application key is restricted to \"pc-backup\"\n        account_info = MockAccountInfo(allowed_bucket_name=\"pc-backup\", allowed_bucket_id=\"bucket_id_pc_backup\")\n        \n        with patch('b2.api.B2Session') as MockSession:\n            instance = MockSession.return_value\n            # list_buckets returns a list of buckets. \n            # If bucket_id is provided, it returns just that one.\n            def side_effect(account_id, bucket_id=None):\n                if bucket_id == \"bucket_id_pc_backup\":\n                    return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]}\n                elif bucket_id is None:\n                    # If it's restricted and bucket_id is None, the library should raise RestrictedBucket locally.\n                    # But here we are testing if get_bucket_by_name now correctly passes the bucket_name to list_buckets.\n                    return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]}\n                return {'buckets': []}\n            \n            instance.list_buckets.side_effect = side_effect\n            \n            api = B2Api(account_info=account_info)\n            try:\n                bucket = api.get_bucket_by_name('pc-backup')\n                print(\"SUCCESS\")\n            except RestrictedBucket as e:\n                print(f\"FAILED: RestrictedBucket: {e}\")\n            except Exception as e:\n                print(f\"FAILED: {type(e).__name__}: {e}\")\n\nif __name__ == '__main__':\n    unittest.main(argv=['first-arg-is-ignored'], exit=False)\nPY\n"
}
Result of run_command 195 characters
{
  "status": "ok",
  "stdout": "FAILED: KeyError: 'bucketType'\n",
  "stderr": ".\n----------------------------------------------------------------------\nRan 1 test in 0.000s\n\nOK\n",
  "exit_code": 0
}
Generated tokens 638 tokens · stopped: STOP
Now let's run the reproduction script again to verify the fix. <channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY' import unittest from unittest.mock import MagicMock, patch from b2.api import B2Api, RestrictedBucket, NonExistentBucket from b2.bucket import Bucket class MockAccountInfo: def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None): self.allowed_bucket_name = allowed_bucket_name self.allowed_bucket_id = allowed_bucket_id def get_account_id(self): return "account_id" def get_allowed(self): return { 'bucketName': self.allowed_bucket_name, 'bucketId': self.allowed_bucket_id } class TestB2Api(unittest.TestCase): def test_get_bucket_by_name_restricted(self): # Application key is restricted to "pc-backup" account_info = MockAccountInfo(allowed_bucket_name="pc-backup", allowed_bucket_id="bucket_id_pc_backup") with patch('b2.api.B2Session') as MockSession: instance = MockSession.return_value # list_buckets returns a list of buckets. # If bucket_id is provided, it returns just that one. def side_effect(account_id, bucket_id=None): if bucket_id == "bucket_id_pc_backup": return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]} elif bucket_id is None: # If it's restricted and bucket_id is None, the library should raise RestrictedBucket locally. # But here we are testing if get_bucket_by_name now correctly passes the bucket_name to list_buckets. return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup'}]} return {'buckets': []} instance.list_buckets.side_effect = side_effect api = B2Api(account_info=account_info) try: bucket = api.get_bucket_by_name('pc-backup') print("SUCCESS") except RestrictedBucket as e: print(f"FAILED: RestrictedBucket: {e}") except Exception as e: print(f"FAILED: {type(e).__name__}: {e}") if __name__ == '__main__': unittest.main(argv=['first-arg-is-ignored'], exit=False) PY <|"|>}<tool_call|><|tool_response>
Turn 10at 396 s689 tokens out7,943 prompt tokens
Ah, I got `KeyError: 'bucketType'`. This is because `BucketFactory.from_api_response` probably expects `bucketType` in the response.

Looking at `b2/api.py` around `BucketFactory.from_api_response` call in `list_buckets`:
```python
        buckets = BucketFactory.from_api_response(self, response)
```

I should update my mock response to include `bucketType`.
TOOL CALL · run_command
{
  "command": "python3 - <<'PY'\nimport unittest\nfrom unittest.mock import MagicMock, patch\nfrom b2.api import B2Api, RestrictedBucket, NonExistentBucket\nfrom b2.bucket import Bucket\n\nclass MockAccountInfo:\n    def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None):\n        self.allowed_bucket_name = allowed_bucket_name\n        self.allowed_bucket_id = allowed_bucket_id\n    \n    def get_account_id(self):\n        return \"account_id\"\n    \n    def get_allowed(self):\n        return {\n            'bucketName': self.allowed_bucket_name,\n            'bucketId': self.allowed_bucket_id\n        }\n\nclass TestB2Api(unittest.TestCase):\n    def test_get_bucket_by_name_restricted(self):\n        # Application key is restricted to \"pc-backup\"\n        account_info = MockAccountInfo(allowed_bucket_name=\"pc-backup\", allowed_bucket_id=\"bucket_id_pc_backup\")\n        \n        with patch('b2.api.B2Session') as MockSession:\n            instance = MockSession.return_value\n            # list_buckets returns a list of buckets. \n            # If bucket_id is provided, it returns just that one.\n            def side_effect(account_id, bucket_id=None):\n                if bucket_id == \"bucket_id_pc_backup\":\n                    return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup', 'bucketType': 'allPublic'}]}\n                elif bucket_id is None:\n                    return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup', 'bucketType': 'allPublic'}]}\n                return {'buckets': []}\n            \n            instance.list_buckets.side_effect = side_effect\n            \n            api = B2Api(account_info=account_info)\n            try:\n                bucket = api.get_bucket_by_name('pc-backup')\n                print(\"SUCCESS\")\n            except RestrictedBucket as e:\n                print(f\"FAILED: RestrictedBucket: {e}\")\n            except Exception as e:\n                print(f\"FAILED: {type(e).__name__}: {e}\")\n\nif __name__ == '__main__':\n    unittest.main(argv=['first-arg-is-ignored'], exit=False)\nPY\n"
}
Result of run_command 195 characters
{
  "status": "ok",
  "stdout": "FAILED: KeyError: 'bucketInfo'\n",
  "stderr": ".\n----------------------------------------------------------------------\nRan 1 test in 0.000s\n\nOK\n",
  "exit_code": 0
}
Generated tokens 689 tokens · stopped: STOP
Ah, I got `KeyError: 'bucketType'`. This is because `BucketFactory.from_api_response` probably expects `bucketType` in the response. Looking at `b2/api.py` around `BucketFactory.from_api_response` call in `list_buckets`: ```python buckets = BucketFactory.from_api_response(self, response) ``` I should update my mock response to include `bucketType`. <channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY' import unittest from unittest.mock import MagicMock, patch from b2.api import B2Api, RestrictedBucket, NonExistentBucket from b2.bucket import Bucket class MockAccountInfo: def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None): self.allowed_bucket_name = allowed_bucket_name self.allowed_bucket_id = allowed_bucket_id def get_account_id(self): return "account_id" def get_allowed(self): return { 'bucketName': self.allowed_bucket_name, 'bucketId': self.allowed_bucket_id } class TestB2Api(unittest.TestCase): def test_get_bucket_by_name_restricted(self): # Application key is restricted to "pc-backup" account_info = MockAccountInfo(allowed_bucket_name="pc-backup", allowed_bucket_id="bucket_id_pc_backup") with patch('b2.api.B2Session') as MockSession: instance = MockSession.return_value # list_buckets returns a list of buckets. # If bucket_id is provided, it returns just that one. def side_effect(account_id, bucket_id=None): if bucket_id == "bucket_id_pc_backup": return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup', 'bucketType': 'allPublic'}]} elif bucket_id is None: return {'buckets': [{'bucketName': 'pc-backup', 'bucketId': 'bucket_id_pc_backup', 'bucketType': 'allPublic'}]} return {'buckets': []} instance.list_buckets.side_effect = side_effect api = B2Api(account_info=account_info) try: bucket = api.get_bucket_by_name('pc-backup') print("SUCCESS") except RestrictedBucket as e: print(f"FAILED: RestrictedBucket: {e}") except Exception as e: print(f"FAILED: {type(e).__name__}: {e}") if __name__ == '__main__': unittest.main(argv=['first-arg-is-ignored'], exit=False) PY <|"|>}<tool_call|><|tool_response>
Turn 11at 420 s543 tokens out8,708 prompt tokens
Still missing keys for `BucketFactory`. I should probably just mock `BucketFactory.from_api_response` instead of trying to construct the exact response the factory expects.
TOOL CALL · run_command
{
  "command": "python3 - <<'PY'\nimport unittest\nfrom unittest.mock import MagicMock, patch\nfrom b2.api import B2Api, RestrictedBucket, NonExistentBucket\nfrom b2.bucket import Bucket\n\nclass MockAccountInfo:\n    def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None):\n        self.allowed_bucket_name = allowed_bucket_name\n        self.allowed_bucket_id = allowed_bucket_id\n    \n    def get_account_id(self):\n        return \"account_id\"\n    \n    def get_allowed(self):\n        return {\n            'bucketName': self.allowed_bucket_name,\n            'bucketId': self.allowed_bucket_id\n        }\n\nclass TestB2Api(unittest.TestCase):\n    def test_get_bucket_by_name_restricted(self):\n        # Application key is restricted to \"pc-backup\"\n        account_info = MockAccountInfo(allowed_bucket_name=\"pc-backup\", allowed_bucket_id=\"bucket_id_pc_backup\")\n        \n        with patch('b2.api.B2Session') as MockSession, \\\n             patch('b2.api.BucketFactory.from_api_response') as MockFactory:\n            \n            instance = MockSession.return_value\n            \n            # Mock Bucket object\n            mock_bucket = MagicMock()\n            mock_bucket.name = 'pc-backup'\n            mock_bucket.id_ = 'bucket_id_pc_backup'\n            \n            MockFactory.return_value = [mock_bucket]\n            \n            api = B2Api(account_info=account_info)\n            try:\n                bucket = api.get_bucket_by_name('pc-backup')\n                print(\"SUCCESS\")\n            except RestrictedBucket as e:\n                print(f\"FAILED: RestrictedBucket: {e}\")\n            except Exception as e:\n                print(f\"FAILED: {type(e).__name__}: {e}\")\n\nif __name__ == '__main__':\n    unittest.main(argv=['first-arg-is-ignored'], exit=False)\nPY\n"
}
Result of run_command 172 characters
{
  "status": "ok",
  "stdout": "SUCCESS\n",
  "stderr": ".\n----------------------------------------------------------------------\nRan 1 test in 0.001s\n\nOK\n",
  "exit_code": 0
}
Generated tokens 543 tokens · stopped: STOP
Still missing keys for `BucketFactory`. I should probably just mock `BucketFactory.from_api_response` instead of trying to construct the exact response the factory expects. <channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY' import unittest from unittest.mock import MagicMock, patch from b2.api import B2Api, RestrictedBucket, NonExistentBucket from b2.bucket import Bucket class MockAccountInfo: def __init__(self, allowed_bucket_name=None, allowed_bucket_id=None): self.allowed_bucket_name = allowed_bucket_name self.allowed_bucket_id = allowed_bucket_id def get_account_id(self): return "account_id" def get_allowed(self): return { 'bucketName': self.allowed_bucket_name, 'bucketId': self.allowed_bucket_id } class TestB2Api(unittest.TestCase): def test_get_bucket_by_name_restricted(self): # Application key is restricted to "pc-backup" account_info = MockAccountInfo(allowed_bucket_name="pc-backup", allowed_bucket_id="bucket_id_pc_backup") with patch('b2.api.B2Session') as MockSession, \ patch('b2.api.BucketFactory.from_api_response') as MockFactory: instance = MockSession.return_value # Mock Bucket object mock_bucket = MagicMock() mock_bucket.name = 'pc-backup' mock_bucket.id_ = 'bucket_id_pc_backup' MockFactory.return_value = [mock_bucket] api = B2Api(account_info=account_info) try: bucket = api.get_bucket_by_name('pc-backup') print("SUCCESS") except RestrictedBucket as e: print(f"FAILED: RestrictedBucket: {e}") except Exception as e: print(f"FAILED: {type(e).__name__}: {e}") if __name__ == '__main__': unittest.main(argv=['first-arg-is-ignored'], exit=False) PY <|"|>}<tool_call|><|tool_response>
Turn 12at 427 s86 tokens out9,321 prompt tokens
Great! The fix is verified.

Now I should check if there are any other occurrences of `list_buckets()` being called without `bucket_name` where it might be needed.

Scanning `b2/api.py` for `list_buckets()` calls.
TOOL CALL · run_command
{
  "command": "grep -rn \"list_buckets()\" b2/api.py"
}
Result of run_command 127 characters
{
  "status": "error",
  "error_type": "CommandError",
  "error_message": "",
  "details": {
    "stdout": "",
    "stderr": "",
    "exit_code": 1
  }
}
Generated tokens 86 tokens · stopped: STOP
Great! The fix is verified. Now I should check if there are any other occurrences of `list_buckets()` being called without `bucket_name` where it might be needed. Scanning `b2/api.py` for `list_buckets()` calls. <channel|><|tool_call>call:run_command{command:<|"|>grep -rn "list_buckets()" b2/api.py<|"|>}<tool_call|><|tool_response>
Turn 13at 430 s49 tokens out9,462 prompt tokens
Ah, `list_buckets()` might be called as `self.list_buckets()`.
TOOL CALL · run_command
{
  "command": "grep -rn \".list_buckets(\" b2/api.py"
}
Result of run_command 327 characters
{
  "status": "ok",
  "stdout": "134:                allowed_bucket_response = self.raw_api.list_buckets(\n219:        for bucket in self.list_buckets(bucket_name):\n234:    def list_buckets(self, bucket_name=None):\n265:        response = self.session.list_buckets(account_id, bucket_id=bucket_id)\n",
  "stderr": "",
  "exit_code": 0
}
Generated tokens 49 tokens · stopped: STOP
Ah, `list_buckets()` might be called as `self.list_buckets()`. <channel|><|tool_call>call:run_command{command:<|"|>grep -rn ".list_buckets(" b2/api.py<|"|>}<tool_call|><|tool_response>
Turn 14at 435 s110 tokens out9,637 prompt tokens
Line 219 is the one I just changed.
Line 134 is `self.raw_api.list_buckets(`. `raw_api` is likely `B2Session`.
Line 265 is `self.session.list_buckets(`.

Wait, let's look at line 134.
TOOL CALL · read_file
{
  "end_line": 145,
  "filepath": "b2/api.py",
  "start_line": 125
}
Result of read_file 1,280 characters
{
  "status": "ok",
  "filepath": "b2/api.py",
  "content": "        realm_url = self.account_info.REALM_URLS[realm]\n        response = self.raw_api.authorize_account(realm_url, account_id_or_key_id, application_key)\n        allowed = response['allowed']\n\n        # If there is a bucket restriction, get the name of the bucket.\n        # And, if we have a list of the one allowed bucket, go ahead and\n        # save it.\n        if 'listBuckets' in allowed['capabilities']:\n            if allowed['bucketId'] is not None:\n                allowed_bucket_response = self.raw_api.list_buckets(\n                    api_url=response['apiUrl'],\n                    account_auth_token=response['authorizationToken'],\n                    account_id=response['accountId'],\n                    bucket_id=allowed['bucketId'],\n                )\n                allowed_bucket_list = allowed_bucket_response['buckets']\n                allowed_bucket_count = len(allowed_bucket_list)\n                assert allowed_bucket_count in [0, 1]\n                if allowed_bucket_count == 0:\n                    # bucket has been deleted since the key was made\n                    allowed['bucketName'] = None",
  "start_line": 125,
  "end_line": 145,
  "total_lines": 372,
  "is_truncated": false
}
Generated tokens 110 tokens · stopped: STOP
Line 219 is the one I just changed. Line 134 is `self.raw_api.list_buckets(`. `raw_api` is likely `B2Session`. Line 265 is `self.session.list_buckets(`. Wait, let's look at line 134. <channel|><|tool_call>call:read_file{end_line:145,filepath:<|"|>b2/api.py<|"|>,start_line:125}<tool_call|><|tool_response>

Patch, tests and logs

Final code change Included
diff --git a/b2/api.py b/b2/api.py
index 017f5ba..300e6a9 100644
--- a/b2/api.py
+++ b/b2/api.py
@@ -216,7 +216,7 @@ class B2Api(object):
         if id_ is not None:
             return Bucket(self, id_, name=bucket_name)
 
-        for bucket in self.list_buckets():
+        for bucket in self.list_buckets(bucket_name):
             if bucket.name == bucket_name:
                 return bucket
         raise NonExistentBucket(bucket_name)
Test output Included
============================= test session starts ==============================
collected 6 items

test/test_api.py ..F...                                                  [100%]

=================================== FAILURES ===================================
/B2_Command_Line_Tool/b2/api.py:367: RecursionError: maximum recursion depth exceeded
==================================== PASSES ====================================
- generated xml file: /tmp/rebench-grade-7ca7163b33d9493184fdae67a6e2c6c7.xml --
=========================== short test summary info ============================
PASSED test/test_api.py::TestApi::test_get_bucket_by_name_with_bucket_restriction
PASSED test/test_api.py::TestApi::test_list_buckets
PASSED test/test_api.py::TestApi::test_list_buckets_with_restriction
PASSED test/test_api.py::TestApi::test_list_buckets_with_restriction_and_no_name
PASSED test/test_api.py::TestApi::test_list_buckets_with_restriction_and_wrong_name
FAILED test/test_api.py::TestApi::test_list_buckets_with_name - RecursionErro...
========================= 1 failed, 5 passed in 0.08s ==========================
Test errors Included
Test report (JUnit) Included
<?xml version="1.0" encoding="utf-8"?><testsuites><testsuite errors="0" failures="1" hostname="3f1cba148adc" name="pytest" skipped="0" tests="6" time="0.081" timestamp="2026-11-14T04:10:54.007487"><testcase classname="test.test_api.TestApi" name="test_get_bucket_by_name_with_bucket_restriction" time="0.001" /><testcase classname="test.test_api.TestApi" name="test_list_buckets" time="0.000" /><testcase classname="test.test_api.TestApi" name="test_list_buckets_with_name" time="0.002"><failure message="RecursionError: maximum recursion depth exceeded">E   RecursionError: maximum recursion depth exceeded
!!! Recursion detected (same locals &amp; position)</failure></testcase><testcase classname="test.test_api.TestApi" name="test_list_buckets_with_restriction" time="0.000" /><testcase classname="test.test_api.TestApi" name="test_list_buckets_with_restriction_and_no_name" time="0.000" /><testcase classname="test.test_api.TestApi" name="test_list_buckets_with_restriction_and_wrong_name" 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 
Backblaze/B2_Command_Line_Tool.
  [  32.2s] 💭 (1644 chars) "The user is reporting an issue where `b2.api.B2Api.get_bucket_by_name` fails when using 
bucket-scoped application keys.
..."
  [  32.2s] 🔧 run_command grep -rn --include="*.py" "get_bucket_by_name" .
  [  32.3s]   → ./test/test_console_tool.py:388:        bucket = self.b2_api.get_bucket_by_name('my-bucket')
  [  38.5s] 💭 (149 chars) "Okay, the target function is `b2.api.B2Api.get_bucket_by_name` in `b2/api.py`.

Let's read `b2/api.py` around line 206 a..."
  [  38.5s] 📖 read_file (b2/api.py)
  [  38.5s]   ✓ {'status': 'ok', 'filepath': 'b2/api.py', 'content': '        )\n        return 
self.transferer.download_file_from_url(u…
  [  42.8s] 💭 (42 chars) "And let's see `check_bucket_restrictions`."
  [  42.8s] 📖 read_file (b2/api.py)
  [  42.9s]   ✓ {'status': 'ok', 'filepath': 'b2/api.py', 'content': 
'##################################################################…
  [  56.9s] 💭 (472 chars) "Wait, I read the beginning of the file. I need to read `check_bucket_restrictions`. I'll 
search for it.
The previous `re..."
  [  56.9s] 🔧 run_command grep -n "def check_bucket_restrictions" b2/api.py
  [  57.0s]   → 359:    def check_bucket_restrictions(self, bucket_name):
  [  59.9s] 💭 (45 chars) "Ah, it's at line 359. I'll read around there."
  [  59.9s] 📖 read_file (b2/api.py)
  [  60.0s]   ✓ {'status': 'ok', 'filepath': 'b2/api.py', 'content': 
'##################################################################…
  [  72.2s] 💭 (524 chars) "I keep requesting line ranges that are being truncated or not what I want. I specified 
`start_line":350` and `end_line":..."
  [  72.2s] 📖 read_file (b2/api.py)
  [  72.3s]   ✓ {'status': 'ok', 'filepath': 'b2/api.py', 'content': '        return self.session.list_keys(\n          
account_id, ma…
  [ 280.2s] 💭 (11209 chars) "Okay, now I have it:
```python
    def check_bucket_restrictions(self, bucket_name):
        """
        Checks to see i..."
  [ 280.2s] 🔧 run_command (53 lines) python3 - <<'PY'
  [ 280.4s]   → FAILED: RestrictedBucket: Application key is restricted to bucket: pc-backup
  [ 296.7s] 💭 (581 chars) "Wait, the output says `FAILED: RestrictedBucket: Application key is restricted to bucket: 
pc-backup` but then `Ran 1 tes..."
  [ 296.7s] ✏️ edit_file (b2/api.py)
  [ 296.8s]   ✓ {'status': 'ok', 'filepath': 'b2/api.py', 'occurrences': 1, 'strategy': 'exact', 'diff': '--- 
a/b2/api.py\n+++ b/b2/api.…
  [ 366.9s] 💭 (62 chars) "Now let's run the reproduction script again to verify the fix."
  [ 366.9s] 🔧 run_command (52 lines) python3 - <<'PY'
  [ 367.0s]   → FAILED: KeyError: 'bucketType'
  [ 395.5s] 💭 (360 chars) "Ah, I got `KeyError: 'bucketType'`. This is because `BucketFactory.from_api_response` 
probably expects `bucketType` in t..."
  [ 395.5s] 🔧 run_command (50 lines) python3 - <<'PY'
  [ 395.6s]   → FAILED: KeyError: 'bucketInfo'
  [ 419.5s] 💭 (172 chars) "Still missing keys for `BucketFactory`. I should probably just mock 
`BucketFactory.from_api_response` instead of trying ..."
  [ 419.5s] 🔧 run_command (49 lines) python3 - <<'PY'
  [ 419.6s]   → SUCCESS
  [ 426.2s] 💭 (213 chars) "Great! The fix is verified.

Now I should check if there are any other occurrences of `list_buckets()` being called with..."
  [ 426.2s] 🔧 run_command grep -rn "list_buckets()" b2/api.py
  [ 426.2s]   → error (exit 0): 
  [ 429.4s] 💭 (62 chars) "Ah, `list_buckets()` might be called as `self.list_buckets()`."
  [ 429.4s] 🔧 run_command grep -rn ".list_buckets(" b2/api.py
  [ 429.4s]   → 134:                allowed_bucket_response = self.raw_api.list_buckets(
  [ 435.1s] 💭 (183 chars) "Line 219 is the one I just changed.
Line 134 is `self.raw_api.list_buckets(`. `raw_api` is likely `B2Session`.
Line 265 ..."
  [ 435.1s] 📖 read_file (b2/api.py)
  [ 435.1s]   ✓ {'status': 'ok', 'filepath': 'b2/api.py', 'content': "        realm_url = 
self.account_info.REALM_URLS[realm]\n        r…
Native result row
{
  "agent_error": "Agent exceeded session timeout (7.5 min)",
  "duration_seconds": 453.35,
  "error": "Test failures/errors recorded in JUnit XML (failures=1, errors=0)",
  "grade": {
    "collected_tests": 6,
    "competition_junit_ok": false,
    "error": "Test failures/errors recorded in JUnit XML (failures=1, errors=0)",
    "required_issues_count": 1,
    "resolved": false,
    "status_counts": {
      "FAILED": 1,
      "PASSED": 5
    },
    "strict_clean_patch": true,
    "test_exit_code": 1
  },
  "instance_id": "backblaze__b2_command_line_tool-488",
  "pass_idx": 0,
  "patch_chars": 445,
  "phase1_seconds": 452.68,
  "repo": "Backblaze/B2_Command_Line_Tool",
  "request_log_path": "/kaggle-root/working/r31/rollouts_X/requests/backblaze__b2_command_line_tool-488__p0__r3.jsonl",
  "resolved": false,
  "rollout_idx": 3,
  "run_key": "backblaze__b2_command_line_tool-488__p0__r3",
  "strict_clean_patch": true,
  "tool_calls": 14,
  "total_llm_calls": 14,
  "trace_path": "/kaggle-root/working/r31/rollouts_X/traces/trace_backblaze__b2_command_line_tool-488__p0__r3.json"
}