[3.14] pythongh-140485: Catch ChildProcessError in multiprocessing resource tracker (pythonGH-141132) (python#141384)

pythongh-140485: Catch ChildProcessError in multiprocessing resource tracker (pythonGH-141132)
(cherry picked from commit 9cb8c52)

Co-authored-by: Victor Stinner <[email protected]>

Author: miss-islington

Lib/multiprocessing/resource_tracker.py

@@ -111,7 +111,12 @@ def _stop_locked(
         close(self._fd)
         self._fd = None
 
-        _, status = waitpid(self._pid, 0)
+        try:
+            _, status = waitpid(self._pid, 0)
+        except ChildProcessError:
+            self._pid = None
+            self._exitcode = None
+            return
 
         self._pid = None