[Python-checkins] bpo-37531: regrtest now catchs ProcessLookupError (GH-16827)

[Victor Stinner]

https://github.com/python/cpython/commit/a661392f8fb5ac4fc095aa1845d1eb7a25c4e9be
commit: a661392f8fb5ac4fc095aa1845d1eb7a25c4e9be
branch: master
author: Victor Stinner <vstinner at python.org>
committer: GitHub <noreply at github.com>
date: 2019-10-17T00:29:12+02:00
summary:

bpo-37531: regrtest now catchs ProcessLookupError (GH-16827)

Fix a warning on a race condition on TestWorkerProcess.kill(): ignore
silently ProcessLookupError rather than logging an useless warning.

files:
M Lib/test/libregrtest/runtest_mp.py

diff --git a/Lib/test/libregrtest/runtest_mp.py b/Lib/test/libregrtest/runtest_mp.py
index 71db8d6966859..8026de187d587 100644
--- a/Lib/test/libregrtest/runtest_mp.py
+++ b/Lib/test/libregrtest/runtest_mp.py
@@ -152,6 +152,11 @@ def _kill(self):
         print(f"Kill {self}", file=sys.stderr, flush=True)
         try:
             popen.kill()
+        except ProcessLookupError:
+            # Process completed, the TestWorkerProcess thread read its exit
+            # status, but Popen.send_signal() read the returncode just before
+            # Popen.wait() set returncode.
+            pass
         except OSError as exc:
             print_warning(f"Failed to kill {self}: {exc!r}")