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-rw-r--r--Lib/contextlib.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/Lib/contextlib.py b/Lib/contextlib.py
index 38ec577598..fba4889002 100644
--- a/Lib/contextlib.py
+++ b/Lib/contextlib.py
@@ -125,7 +125,8 @@ def nested(*managers):
# Don't rely on sys.exc_info() still containing
# the right information. Another exception may
# have been raised and caught by an exit method
- raise exc[0](exc[1]).with_traceback(exc[2])
+ # exc[1] already has the __traceback__ attribute populated
+ raise exc[1]
class closing(object):