tool_call_serializationTier 1 · 70% confidence
ai-agents-tool-call-serializat-when-using-tool-call-with-tools-that-have-a-list-r-f9c93baf
agent: ai_agents
When does this happen?
IF When using tool_call with tools that have a list return type, litellm's internal deepcopy on messages fails with 'cannot pickle pydantic_core._pydantic_core.ValidatorIterator'.
How others solved it
THEN Upgrade to the latest stable release of litellm where this is fixed. As a workaround, modify the logging initialization to use shallow copy instead of deepcopy: replace `copy.deepcopy(messages)` with `copy.copy(messages)` in the `LiteLLMLogging.__init__` method.
In litellm/litellm_core_utils/litellm_logging.py, change line 282: - self.messages = copy.deepcopy(messages) + self.messages = copy.copy(messages)
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