{"record":{"id":"1d08fa6aa868f1f0","repo":"huggingface/smolagents","slug":"your-code-snippet-is-invalid-because-the-regex-pa-1d08fa","errorCode":null,"errorMessage":"Your code snippet is invalid, because the regex pattern {code_block_tags[0]}(.*?){code_block_tags[1]} was not found in it.\nHere is your code snippet:\n{text}\nMake sure to include code with the correct pattern, for instance:\nThoughts: Your thoughts\n{code_block_tags[0]}\n# Your python code here\n{code_block_tags[1]}","messagePattern":"Your code snippet is invalid, because the regex pattern (.+?)\\(\\.\\*\\?\\)(.+?) was not found in it\\.\nHere is your code snippet:\n(.+?)\nMake sure to include code with the correct pattern, for instance:\nThoughts: Your thoughts\n(.+?)\n# Your python code here\n(.+?)","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"src/smolagents/utils.py","lineNumber":238,"sourceCode":"        return text\n    except SyntaxError:\n        pass\n\n    if \"final\" in text and \"answer\" in text:\n        raise ValueError(\n            dedent(\n                f\"\"\"\n                Your code snippet is invalid, because the regex pattern {code_block_tags[0]}(.*?){code_block_tags[1]} was not found in it.\n                Here is your code snippet:\n                {text}\n                It seems like you're trying to return the final answer, you can do it as follows:\n                {code_block_tags[0]}\n                final_answer(\"YOUR FINAL ANSWER HERE\")\n                {code_block_tags[1]}\n                \"\"\"\n            ).strip()\n        )\n    raise ValueError(\n        dedent(\n            f\"\"\"\n            Your code snippet is invalid, because the regex pattern {code_block_tags[0]}(.*?){code_block_tags[1]} was not found in it.\n            Here is your code snippet:\n            {text}\n            Make sure to include code with the correct pattern, for instance:\n            Thoughts: Your thoughts\n            {code_block_tags[0]}\n            # Your python code here\n            {code_block_tags[1]}\n            \"\"\"\n        ).strip()\n    )\n\n\nMAX_LENGTH_TRUNCATE_CONTENT = 20000\n\n","sourceCodeStart":220,"sourceCodeEnd":256,"githubUrl":"https://github.com/huggingface/smolagents/blob/30bb1161095dbae2271e6bc3cc4c219cc3897a57/src/smolagents/utils.py#L220-L256","documentation":"Same parsing path as the previous error but the generic branch: the code-block regex found nothing, the text is not valid Python on its own, and it does not look like a final-answer attempt. The message shows the expected pattern including 'Thoughts:' followed by a fenced code block.","triggerScenarios":"Model output contains neither a parseable code block nor valid bare Python — e.g. only thoughts, or code without the required fence tags.","commonSituations":"Models omitting markdown fences, using wrong fence language tags, or truncating before the code block; templates mismatched to model dialect.","solutions":["Retry with the error fed back so the model adds a proper ```python block","Verify the model uses markdown code fences; switch templates or models if not","Increase max_tokens to avoid truncation before the code block"],"exampleFix":"# before (model output)\nThought: I'll compute it. result = 6*7  # no code block\n\n# after\nThought: I'll compute it.\n```python\nresult = 6*7\n```","handlingStrategy":"retry","validationCode":"import re\ndef has_code_block(text: str) -> bool:\n    return bool(re.search(r'```\\w*\\n.*?```', text, re.DOTALL))","typeGuard":"def is_parseable_step(text: str) -> bool:\n    import ast, re\n    try:\n        ast.parse(text)\n        return True\n    except SyntaxError:\n        return has_code_block(text)","tryCatchPattern":"try:\n    code = parse_code_blobs(text)\nexcept ValueError:\n    # re-prompt with the error text; the included example pattern is the fix instruction\n    raise","preventionTips":["Choose models that reliably emit fenced code blocks","Keep max_tokens high enough to include the code block","Avoid prompt overrides that break the Thought/code format"],"tags":["smolagents","code-agent","llm-output-parsing","prompt-format"],"backgroundTag":"invalid-model-code-block","analyzedSha":"30bb1161095dbae2271e6bc3cc4c219cc3897a57","analyzedAt":"2026-08-28T18:52:54.169Z","schemaVersion":2},"datasetVersion":"2026-08-28T21:17:43.275Z"}