| multiprocessing: Fix a race condition in Popen of | |
| multiprocessing.popen_spawn_win32. The child process now duplicates the read | |
| end of pipe instead of "stealing" it. Previously, the read end of pipe was | |
| "stolen" by the child process, but it leaked a handle if the child process had | |
| been terminated before it could steal the handle from the parent process. |