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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: [PATCH] Unconditional quit on SIGUSR2
Date: Mon, 28 Mar 2011 10:32:02 -0400
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To: Julien Danjou <julien@danjou.info>
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> From: Julien Danjou <julien@danjou.info>
> Cc: Daniel Colascione <dan.colascione@gmail.com>,  emacs-devel@gnu.org
> Date: Mon, 28 Mar 2011 14:32:02 +0200
> 
> I can't judge the internal, but I already had Emacs hanging somewhere
> for ever, and cannot do anything but SIGKILL it.

Maybe I'm mistaken, but AFAIK if SIGTERM cannot interrupt Emacs,
neither will SIGUSR2.