fix: handle unserializable objects in serialize_defaults#1527
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Wrap the core logic in _serialize_defaults_inner and catch any exception in the outer serialize_defaults, falling back to str(). This prevents serialization failures (e.g. copy.deepcopy on unpicklable objects like _queue.SimpleQueue in httpx clients) from crashing callers like tracing. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
radugheo
approved these changes
Mar 30, 2026
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Summary
serialize_defaultscore logic in_serialize_defaults_innerwith a top-level try/except that falls back tostr(obj)on any failurecopy.deepcopyon unpicklable objects like_queue.SimpleQueuein httpx clients) from crashing callers like the tracing decoratordataclasses.asdict()usescopy.deepcopyinternally, which fails when a dataclass (like LangGraph'sToolCallRequest) contains objects with unpicklable stateTest plan
SimpleQueuefield🤖 Generated with Claude Code