When another workflow B encapsulated as a tool is invoked in workflow A, another error is triggered when B returns to A

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Dify version

1.0.0

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

Using a workflow for tool encapsulation, when core/workflow/nodes/llm/node.py LLMNode._run is called before the result_text is initialized, it causes the last output dict to reference an uninitialized variable

✔️ Expected Behavior

Exception information for workflow B can be returned correctly

❌ Actual Behavior

At the same time as the error is thrown, an "Failed to invoke tool: cannot access local variable 'result_text' where it is not associated with a value" error is also thrown