fabro/checkpoint.json

{
  "timestamp": "2026-03-16T12:08:28.769515Z",
  "current_node": "extract_patch",
  "completed_nodes": [
    "start",
    "setup",
    "solve",
    "extract_patch"
  ],
  "node_retries": {
    "extract_patch": 1,
    "setup": 1,
    "start": 1,
    "solve": 1
  },
  "context_values": {
    "graph.rankdir": "LR",
    "current.preamble": "Goal: UsernameValidator allows trailing newline in usernames\nDescription\n\t\nASCIIUsernameValidator and UnicodeUsernameValidator use the regex \nr'^[\\w.@+-]+$'\nThe intent is to only allow alphanumeric characters as well as ., @, +, and -. However, a little known quirk of Python regexes is that $ will also match a trailing newline. Therefore, the user name validators will accept usernames which end with a newline. You can avoid this behavior by instead using \\A and \\Z to terminate regexes. For example, the validator regex could be changed to\nr'\\A[\\w.@+-]+\\Z'\nin order to reject usernames that end with a newline.\nI am not sure how to officially post a patch, but the required change is trivial - using the regex above in the two validators in contrib.auth.validators.\n\n\n## Completed stages\n- **setup**: fail\n  - Script: `git clone https://github.com/django/django.git . && git checkout d26b2424437dabeeca94d7900b37d2df4410da0c && python -m pip install -e .`\n  - Stdout:\n    ```\n    fatal: destination path '.' already exists and is not an empty directory.\n    ```\n  - Stderr: (empty)\n- **solve**: success\n  - Model: gpt-5.4, 203.5k tokens in / 4.4k out\n",
    "internal.retry_count.setup": 1,
    "last_response": "Implemented the fix in a Django checkout at `/home/daytona/workspace/django` since the provided setup failed cloning into the existing workspace.\n\nChanges made:\n- Updated both username validators to u",
    "graph.goal": "UsernameValidator allows trailing newline in usernames\nDescription\n\t\nASCIIUsernameValidator and UnicodeUsernameValidator use the regex \nr'^[\\w.@+-]+$'\nThe intent is to only allow alphanumeric characters as well as ., @, +, and -. However, a little known quirk of Python regexes is that $ will also match a trailing newline. Therefore, the user name validators will accept usernames which end with a newline. You can avoid this behavior by instead using \\A and \\Z to terminate regexes. For example, the validator regex could be changed to\nr'\\A[\\w.@+-]+\\Z'\nin order to reject usernames that end with a newline.\nI am not sure how to officially post a patch, but the required change is trivial - using the regex above in the two validators in contrib.auth.validators.\n",
    "internal.fidelity": "compact",
    "thread.start.current_node": "setup",
    "last_stage": "solve",
    "response.solve": "Implemented the fix in a Django checkout at `/home/daytona/workspace/django` since the provided setup failed cloning into the existing workspace.\n\nChanges made:\n- Updated both username validators to use `\\A...\\Z` instead of `^...$`:\n  - `django/contrib/auth/validators.py`\n- Added regression coverage for usernames ending with a trailing newline:\n  - `tests/auth_tests/test_validators.py`\n\nValidation:\n- Ran: `python tests/runtests.py auth_tests.test_validators`\n- Result: passed\n\nSummary of the actual fix:\n- `r'^[\\w.@+-]+$'` → `r'\\A[\\w.@+-]+\\Z'`\n\nIf you want, I can also provide this as a unified patch snippet.",
    "thread.solve.current_node": "extract_patch",
    "internal.retry_count.extract_patch": 1,
    "internal.node_visit_count": 1,
    "internal.run_id": "01KKV8MVCG5YVWGXZR9DAFMA1T",
    "current_node": "extract_patch",
    "internal.thread_id": "solve",
    "internal.retry_count.start": 1,
    "outcome": "success",
    "failure_class": "",
    "command.stderr": "",
    "internal.retry_count.solve": 1,
    "command.output": "diff --git a/django b/django\n--- a/django\n+++ b/django\n@@ -1 +1 @@\n-Subproject commit d26b2424437dabeeca94d7900b37d2df4410da0c\n+Subproject commit d26b2424437dabeeca94d7900b37d2df4410da0c-dirty\n",
    "failure_signature": "",
    "thread.setup.current_node": "solve"
  },
  "logs": [],
  "node_outcomes": {
    "setup": {
      "status": "fail",
      "context_updates": {
        "command.output": "fatal: destination path '.' already exists and is not an empty directory.\n",
        "command.stderr": ""
      },
      "failure": {
        "message": "Script failed with exit code: 128\n\n## stdout\nfatal: destination path '.' already exists and is not an empty directory.\n",
        "failure_class": "deterministic"
      },
      "duration_ms": 23
    },
    "start": {
      "status": "success",
      "duration_ms": 0
    },
    "solve": {
      "status": "success",
      "context_updates": {
        "last_response": "Implemented the fix in a Django checkout at `/home/daytona/workspace/django` since the provided setup failed cloning into the existing workspace.\n\nChanges made:\n- Updated both username validators to u",
        "last_stage": "solve",
        "response.solve": "Implemented the fix in a Django checkout at `/home/daytona/workspace/django` since the provided setup failed cloning into the existing workspace.\n\nChanges made:\n- Updated both username validators to use `\\A...\\Z` instead of `^...$`:\n  - `django/contrib/auth/validators.py`\n- Added regression coverage for usernames ending with a trailing newline:\n  - `tests/auth_tests/test_validators.py`\n\nValidation:\n- Ran: `python tests/runtests.py auth_tests.test_validators`\n- Result: passed\n\nSummary of the actual fix:\n- `r'^[\\w.@+-]+$'` → `r'\\A[\\w.@+-]+\\Z'`\n\nIf you want, I can also provide this as a unified patch snippet."
      },
      "notes": "Stage completed: solve",
      "usage": {
        "model": "gpt-5.4",
        "input_tokens": 203522,
        "output_tokens": 4385,
        "cache_read_tokens": 159744,
        "reasoning_tokens": 1575,
        "cost": 0.57458
      },
      "duration_ms": 104963
    },
    "extract_patch": {
      "status": "success",
      "context_updates": {
        "command.stderr": "",
        "command.output": "diff --git a/django b/django\n--- a/django\n+++ b/django\n@@ -1 +1 @@\n-Subproject commit d26b2424437dabeeca94d7900b37d2df4410da0c\n+Subproject commit d26b2424437dabeeca94d7900b37d2df4410da0c-dirty\n"
      },
      "notes": "Script completed: git diff",
      "duration_ms": 40
    }
  },
  "next_node_id": "exit",
  "loop_failure_signatures": {
    "setup|deterministic|script failed with exit code: <n> ## stdout fatal: destination path '.' already exists and is not an empty directory.": 1
  },
  "node_visits": {
    "solve": 1,
    "start": 1,
    "extract_patch": 1,
    "setup": 1
  }
}