[issue25960] Popen.wait() hangs with SIGINT when os.waitpid() does not

[Gregory P. Smith]

Gregory P. Smith added the comment:

fundamentally: this shouldn't work anyways.

You are calling wait() from a signal handler.
That is a blocking operation.
You cannot do that from a signal handler.

os.waitpid(p.pid, 1) is os.waitpid(p.pid, os.WNOHANG) which is a non-blocking operation so it works.

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<http://bugs.python.org/issue25960>
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