core: fix tool_call function #28915
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core: fix tool_call function #28915
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tool_calls=[ { "name": "function_name", "args": '{}', "id": "tool_call_id", "type": "tool_call", } ], where args here is a string that resembles a dictionary, rather than the standard dictionary type. This issue is encountered when using the Qwen2.5 API and cannot be resolved by adding exception handling within the user-constructed chain or graph, as it is an error within LangChain itself. This update proactively catches dictionary-like structures in args if they are strings, which resolves the issue.