{"record":{"id":"855e94de35f59158","repo":"Aider-AI/aider","slug":"processed-n-err","errorCode":null,"errorMessage":"{processed}\\n^^^ {err}","messagePattern":"\\{processed\\}\\\\n\\^\\^\\^ \\{err\\}","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"aider/coders/editblock_coder.py","lineNumber":533,"sourceCode":"                while i < len(lines) and not (\n                    updated_pattern.match(lines[i].strip())\n                    or divider_pattern.match(lines[i].strip())\n                ):\n                    updated_text.append(lines[i])\n                    i += 1\n\n                if i >= len(lines) or not (\n                    updated_pattern.match(lines[i].strip())\n                    or divider_pattern.match(lines[i].strip())\n                ):\n                    raise ValueError(f\"Expected `{UPDATED_ERR}` or `{DIVIDER_ERR}`\")\n\n                yield filename, \"\".join(original_text), \"\".join(updated_text)\n\n            except ValueError as e:\n                processed = \"\".join(lines[: i + 1])\n                err = e.args[0]\n                raise ValueError(f\"{processed}\\n^^^ {err}\")\n\n        i += 1\n\n\ndef find_filename(lines, fence, valid_fnames):\n    \"\"\"\n    Deepseek Coder v2 has been doing this:\n\n\n     ```python\n    word_count.py\n    ```\n    ```python\n    <<<<<<< SEARCH\n    ...\n\n    This is a more flexible search back for filenames.\n    \"\"\"","sourceCodeStart":515,"sourceCodeEnd":551,"githubUrl":"https://github.com/Aider-AI/aider/blob/5dc9490bb35f9729ef2c95d00a19ccd30c26339c/aider/coders/editblock_coder.py#L515-L551","documentation":"This is the wrapper re-raise at the end of the generator's except ValueError block: any of the inner parse errors (missing filename, Expected =======, Expected >>>>>>> REPLACE) is re-raised with the full text processed so far prepended and a '^^^ <original error>' suffix pointing at the offending spot. It exists purely to add line context to SEARCH/REPLACE grammar errors.","triggerScenarios":"Any of errors 3-5 firing inside the try block while parsing a fenced SEARCH/REPLACE block; the handler joins lines[:i+1] (everything consumed including the failing line) and re-raises with the '^' pointer.","commonSituations":"Debugging where exactly in an LLM reply the SEARCH/REPLACE grammar broke — the processed prefix shows the malformed block verbatim; commonly seen in logs when models produce structurally invalid edit blocks.","solutions":["Read bottom-up: the text after '^^^' names the actual grammar problem; the text above it shows the input up to the failing line.","Fix the indicated block per the underlying error (filename line, =======, or >>>>>>> REPLACE).","Feed the whole message back to the LLM for a corrected reply.","Add regression tests capturing the offending reply shape when it recurs (aider's tests do exactly this with recorded transcripts)."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"try:\n    edits = list(parse_edits_or_raise(reply))\nexcept ValueError as e:\n    msg = str(e)\n    underlying = msg.split(\"^^^ \")[-1]          # the real grammar error\n    context = msg.split(\"^^^ \")[0]               # processed input up to the failure\n    log_and_retry_with_model(underlying, context)","preventionTips":["Always split on '^^^ ' when logging this error — the suffix names the root cause, the prefix shows where.","Keep recorded transcripts of failing replies as regression fixtures.","Don't string-match the whole message; match the suffix (filename/divider errors) for routing logic."],"tags":["aider","search-replace","parsing","error-context"],"backgroundTag":null,"analyzedSha":"5dc9490bb35f9729ef2c95d00a19ccd30c26339c","analyzedAt":"2026-08-15T05:40:10.498Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}