fix(agents): restore task description when replanning fails (#8308)

lib/crewai/src/crewai/agents/agent_executor.py

@@ -2844,8 +2844,10 @@ class AgentExecutor(Flow[AgentExecutorState], BaseAgentExecutor):
             if self.task:
                 original_description = self.task.description
                 self.task.description = enhanced_description
-                output = planning_handler.handle_agent_reasoning()
-                self.task.description = original_description
+                try:
+                    output = planning_handler.handle_agent_reasoning()
+                finally:
+                    self.task.description = original_description
             else:
                 # description is a read-only property — recreate with enhanced text
                 input_text = getattr(self, "_kickoff_input", "")

lib/crewai/tests/agents/test_agent_executor.py

@@ -2988,6 +2988,22 @@ class TestPlanGenerationIsolation:
             "generate_plan should store plan in state, not task.description"
         )
 
+    def test_failed_replan_restores_task_description(self):
+        task = SimpleNamespace(description="What is the capital of France?")
+        executor = _build_executor(
+            agent=SimpleNamespace(verbose=False),
+            task=task,
+        )
+
+        with patch("crewai.utilities.reasoning_handler.AgentReasoning") as reasoning:
+            reasoning.return_value.handle_agent_reasoning.side_effect = ValueError(
+                "planner failed"
+            )
+            executor._trigger_replan("step 1 is blocked")
+
+        assert task.description == "What is the capital of France?"
+        assert executor.state.last_replan_reason == "Replan failed: planner failed"
+
 
 # Todo Status Tracking