Symptom
A chain returns None for some malformed outputs, and later code fails far from the cause.
Evidence what you'll see
- Input with mismatched brackets, such as {"a": 1}}, gives None
- Other invalid JSON raises OutputParserException as expected
Cause
In the non-streaming path, the partial-JSON helper returns None for bracket mismatches, and that slips through as a result.
Fix steps
0 of 3 done
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Verify the fix worked
- Feed {"a": 1}} into your wrapper: it raises or retries instead of passing None on.
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Sources and credit
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