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bug#11350: Nasty hangup

From: Eli Zaretskii
Subject: bug#11350: Nasty hangup
Date: Thu, 26 Apr 2012 16:42:53 +0300

> From: Antoine Levitt <address@hidden>
> Date: Thu, 26 Apr 2012 15:21:18 +0200
> I'm seeing a very nasty bug, description below. I use bzr trunk and
> update it quite regularly, but the last commits seem pretty harmless
> ... the only change I can see in my environment is that I started using
> org-clock today. The bugs happened when I was working, using python with
> a comint interaction buffer.
> So anyway, when it happens, I get 100% CPU usage, and emacs just
> hangs. I can only get out of it by sending it a SIGUSR2. In which case
> it gives out a useless backtrace (saying it's at top level, as if it
> wasn't doing anything). Once I quit the debugger or access a python
> buffer, it hangs again. The only solution I have is to kill it.
> Sorry I can't provide more information, it only happens sporadically
> (three times today ...)

There's advice in etc/DEBUG about how to investigate "hangs".  (Search
for "If the symptom of the bug is that Emacs fails to respond".)  If
you could follow that advice and post here what you find, that would
be valuable information.

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