Avoid empty task outputs

src/crewai/crew.py

@@ -254,7 +254,7 @@ class Crew(BaseModel):
         if self.full_output:
             return {
                 "final_output": output,
-                "tasks_outputs": [task.output for task in self.tasks],
+                "tasks_outputs": [task.output for task in self.tasks if task],
             }
         else:
             return output

src/crewai/task.py

@@ -116,7 +116,8 @@ class Task(BaseModel):
             for task in self.context:
                 if task.async_execution:
                     task.thread.join()
-                context.append(task.output.raw_output)
+                if task and task.output:
+                    context.append(task.output.raw_output)
             context = "\n".join(context)
 
         tools = tools or self.tools