Update

libs/core/langchain_core/tracers/base.py

@@ -69,7 +69,6 @@ def _get_stacktrace(error: BaseException) -> str:
                 tb = traceback.format_exception(error)
             return msg + "\n\n".join(tb).strip()
         except:  # noqa: E722
-            breakpoint()
             return msg
 
     def _start_trace(self, run: Run) -> None:

libs/core/tests/unit_tests/runnables/test_runnable.py

@@ -3938,7 +3938,7 @@ def raise_value_error(x: int) -> int:
         branch.invoke(1000, config={"callbacks": [tracer]})
 
     assert len(tracer.runs) == 2
-    assert "ValueError('x is too large')" in tracer.runs[1].error
+    assert "ValueError('x is too large')" in str(tracer.runs[1].error)
     assert tracer.runs[1].outputs is None
 
 
@@ -3965,7 +3965,7 @@ async def raise_value_error(x: int) -> int:
         await branch.ainvoke(1000, config={"callbacks": [tracer]})
 
     assert len(tracer.runs) == 2
-    assert "ValueError('x is too large')" in tracer.runs[1].error
+    assert "ValueError('x is too large')" in str(tracer.runs[1].error)
     assert tracer.runs[1].outputs is None
 
 

libs/langchain/tests/unit_tests/callbacks/tracers/test_base_tracer.py

@@ -329,7 +329,13 @@ def test_tracer_llm_run_on_error() -> None:
 
     tracer.on_llm_start(serialized=SERIALIZED, prompts=[], run_id=uuid)
     tracer.on_llm_error(exception, run_id=uuid)
-    assert tracer.runs == [compare_run]
+    assert len(tracer.runs) == 1
+    received = tracer.runs[0].dict()
+    received_err = received.pop("error")
+    expected = compare_run.dict()
+    expected_err = expected.pop("error")
+    assert received == expected
+    assert expected_err in received_err
 
 
 @freeze_time("2023-01-01")