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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.bugs
Subject: Re: run-python hangs for some versions
Date: Tue, 19 Jun 2007 06:40:41 -0400
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    #0  0x401369a2 in select () from /lib/libc.so.6
    #1  0x08317619 in ?? ()
    #2  0x0818789a in close_process_descs () at process.c:3906

That is very strange -- it doesn't seem to fit the code in process.c.

We need to find out what is calling `select' and why.
So you need to study the machine code against the source code.
Is frame #1 emacs_close, or what?