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-rw-r--r--Lib/multiprocessing/managers.py2
-rw-r--r--Misc/NEWS3
2 files changed, 4 insertions, 1 deletions
diff --git a/Lib/multiprocessing/managers.py b/Lib/multiprocessing/managers.py
index c559b55a3f..b175470db9 100644
--- a/Lib/multiprocessing/managers.py
+++ b/Lib/multiprocessing/managers.py
@@ -275,7 +275,7 @@ class Server(object):
try:
send(msg)
except Exception as e:
- send(('#UNSERIALIZABLE', repr(msg)))
+ send(('#UNSERIALIZABLE', format_exc()))
except Exception as e:
util.info('exception in thread serving %r',
threading.current_thread().name)
diff --git a/Misc/NEWS b/Misc/NEWS
index a18ceb674e..9125caf9fa 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -221,6 +221,9 @@ Library
- Issue #27930: Improved behaviour of logging.handlers.QueueListener.
Thanks to Paulo Andrade and Petr Viktorin for the analysis and patch.
+- Issue #21201: Improves readability of multiprocessing error message. Thanks
+ to Wojciech Walczak for patch.
+
IDLE
----