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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: How to debug Error during redisplay
Date: Fri, 11 Jan 2013 12:25:03 +0200
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To: Leo Liu <sdl.web@gmail.com>
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> From: Leo Liu <sdl.web@gmail.com>
> Date: Fri, 11 Jan 2013 17:03:38 +0800
> 
> I have just noticed this (using 24.2.92) in the *message* buffer which I
> cannot reproduce in emacs 24.2. Any idea how to debug this problem?

Run Emacs under GDB, put a breakpoint in safe_eval_handler, and see
which code and in which buffer is responsible.