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gh-155031: repass permission errors on subprocesses to parent / user #155032

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gh-155031: repass permission errors on subprocesses to parent / user #155032

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c888bf0
fix(tachyon): repass permission errors on subprocesses to parent / user
flowln Aug 1, 2026
620339d
news: add NEWS entry for the fixed issue
flowln Aug 1, 2026
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2 changes: 1 addition & 1 deletion Lib/profiling/sampling/__main__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -58,13 +58,13 @@ def handle_permission_error():
print(WINDOWS_PERMISSION_ERROR, file=sys.stderr)
else:
print(GENERIC_PERMISSION_ERROR, file=sys.stderr)
sys.exit(1)

if __name__ == '__main__':
try:
main()
except PermissionError:
handle_permission_error()
sys.exit(1)
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except SamplingUnknownProcessError as err:
print(f"Tachyon cannot find the process: {err}", file=sys.stderr)
sys.exit(1)
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1 change: 0 additions & 1 deletion Lib/profiling/sampling/_child_monitor.py
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Expand Up @@ -237,7 +237,6 @@ def _spawn_profiler_for_child(self, child_pid):
cmd,
stdin=subprocess.DEVNULL,
stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL,
)
with self._lock:
if self._stop_event.is_set():
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2026-08-01-10-54-39.gh-issue-155031.sTB_n8.rst
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@@ -0,0 +1,2 @@
Propagate to user any permission errors from subprocess attach commands in
Tachyon
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