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bug#18438: 24.4.50; assertion failed in bidi.c

From: Ken Brown
Subject: bug#18438: 24.4.50; assertion failed in bidi.c
Date: Thu, 11 Sep 2014 09:18:14 -0400
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

On 9/11/2014 12:31 AM, address@hidden wrote:
On Wed, 10 Sep 2014 22:09:08 +0300, Eli Zaretskii wrote:

Please run Emacs under GDB, and when this happens again, produce a
full backtrace and post it here.  I'd like to see if the symptoms are
similar to what Ken reported in bug #17817.

I am unable to do this because Emacs hangs when run under GDB on opening
a symbolic link.  Emacs hangs with a message in the minibuffer
indicating that it is loading a library that is on my load-path as a
symbolic link; if I replace this symlink with a copy of the file it
links to, Emacs hangs on loading the next library that is installed via
a symlink.  If there are no symlinks on load-path, it hangs where it
would normally load my desktop file, which has files open via symlinks
(i.e. there is a symlink to a directory in their path).  If I run `gdb
emacs`, gdb gives "Error creating process /usr/local/bin/emacs, (error
5)." when I type the `run` command, but it can run emacs if I specify
the name of the binary to which `emacs` is a symlink
(/usr/local/bin/emacs -> /usr/local/bin/emacs-24.4.50.exe).  I am
running GDB 7.8 from the Cygwin package.

I'm surprised Ken did not run into this.  Ken, which version of Cygwin
and GDB were you running at the time?

I was running whatever was current at the time. But there is a bug in GDB 7.8 that prevents you from using it to debug a GUI version of emacs. See https://sourceware.org/bugzilla/show_bug.cgi?id=17247#c34. Until this is fixed, you need to downgrade to the previous release of GDB.


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