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-rw-r--r--Lib/multiprocessing/process.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/multiprocessing/process.py b/Lib/multiprocessing/process.py
index bca8b7a..37365f2 100644
--- a/Lib/multiprocessing/process.py
+++ b/Lib/multiprocessing/process.py
@@ -199,7 +199,7 @@ class BaseProcess(object):
try:
return self._sentinel
except AttributeError:
- raise ValueError("process not started")
+ raise ValueError("process not started") from None
def __repr__(self):
if self is _current_process: