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Re: Emacs 23 Mac port

From: Leo
Subject: Re: Emacs 23 Mac port
Date: Thu, 02 Dec 2010 14:52:58 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2.90 (Mac OS X 10.6.5)

On 2010-12-02 10:01 +0000, YAMAMOTO Mitsuharu wrote:
>> BTW, `mac-mouse-wheel-smooth-scroll' does not work reliably. It can
>> freeze emacs (Can't be interrupted by C-g). So I am not using it for
>> now.
> I've never experienced this.  If it does not happen with -Q, then your
> configuration has something to do with this problem.
> Also, because the actual scrolling code is mostly implemented at the
> Lisp level (without touching inhibit-quit), your problem may indicate
> that there is some infinite loop or hang possibly in the
> platform-independent part such as redisplay.  Identifying the place of
> infinite loop or hang using a debugger may help (see the "If the
> symptom of the bug is that Emacs fails to respond" section in
> etc/DEBUG).

Indeed there is an infinite loop. But I wasn't able to reproduce the
problem with a vanilla Emacs. The problem happens when I am scrolling up
(my hand move from bottom to top on the trackpad) and the infinite loop
happens in xdisp.c between line 12630 and 12789 (the gdb log is

I also find a way to reproduce this problem easily with Emacs -q:

1. eval

  (setq scroll-conservatively 100)
  (setq scroll-preserve-screen-position 'always)

2. try scrolling in a buffer

Attachment: mac-bug.log
Description: mac-bug.log


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