commit 7b5856e7f059748f41f37d00abc76be0807d989d
author Victor Stinner <vstinner@redhat.com> Wed Jun 27 15:17:34 2018 +0200
committer GitHub <noreply@github.com> Wed Jun 27 15:17:34 2018 +0200
tree 15069d49d7c5be1e52ec37a2afea91764efafc51
parent 8b1ebcd7cb3319273ea635df78ebf9ad40171514

Revert "bpo-33929: multiprocessing: fix handle leak on race condition (GH-7921)" (GH-7963)

This reverts commit 8b1ebcd7cb3319273ea635df78ebf9ad40171514.

Lib/multiprocessing/spawn.py

diff --git a/Lib/multiprocessing/spawn.py b/Lib/multiprocessing/spawn.py
index 2de4cb7..1f4f3f4 100644
--- a/Lib/multiprocessing/spawn.py
+++ b/Lib/multiprocessing/spawn.py
@@ -96,15 +96,7 @@
     assert is_forking(sys.argv), "Not forking"
     if sys.platform == 'win32':
         import msvcrt
-        import _winapi
-
-        if parent_pid is not None:
-            source_process = _winapi.OpenProcess(
-                _winapi.PROCESS_DUP_HANDLE, False, parent_pid)
-        else:
-            source_process = None
-        new_handle = reduction.duplicate(pipe_handle,
-                                         source_process=source_process)
+        new_handle = reduction.steal_handle(parent_pid, pipe_handle)
         fd = msvcrt.open_osfhandle(new_handle, os.O_RDONLY)
     else:
         from . import semaphore_tracker