Update core/pipeline_3/logic.py

core/pipeline_3/logic.py

@@ -743,7 +743,7 @@ class PipelineGraphRAG:
             
             usage = None
             for chunk in stream:
-                if chunk.choices[0].delta.content:
+                if chunk.choices and chunk.choices[0].delta.content:
                     token = chunk.choices[0].delta.content
                     full_answer += token
                     yield {"type": "token", "data": token}