Merge branch 'master' into enable-flake8-simplify

python-trio · Oct 24, 2023 · e94a1cb · e94a1cb
2 parents 7fffe21 + a0c480a
commit e94a1cb
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/trio/_threads.py b/trio/_threads.py
@@ -408,10 +408,10 @@ def from_thread_check_cancelled() -> None:
     """
     try:
         raise_cancel = PARENT_TASK_DATA.cancel_register[0]
-    except AttributeError:
+    except AttributeError as exc:
         raise RuntimeError(
             "this thread wasn't created by Trio, can't check for cancellation"
-        )
+        ) from exc
     if raise_cancel is not None:
         raise_cancel()