asyncio: Fix race in subprocess transport, by Victor Stinner.

35456b07 · Guido van Rossum · 91a8c0f6 · 35456b07
Commit 35456b07 authored Jan 10, 2014 by Guido van Rossum
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Lib/asyncio/unix_events.py Lib/asyncio/unix_events.py +2 -1

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--- a/Lib/asyncio/unix_events.py
+++ b/Lib/asyncio/unix_events.py
@@ -160,9 +160,10 @@ class _UnixSelectorEventLoop(selector_events.BaseSelectorEventLoop):
            transp = _UnixSubprocessTransport(self, protocol, args, shell,
                                              stdin, stdout, stderr, bufsize,
                                              extra=None, **kwargs)
+            yield from transp._post_init()
            watcher.add_child_handler(transp.get_pid(),
                                      self._child_watcher_callback, transp)
-        yield from transp._post_init()
+
        return transp

    def _child_watcher_callback(self, pid, returncode, transp):