David Kastrup wrote:

 > the horizontal scroll bar code crashing on me
 > whenever I restore the desktop (which involves restoring the window
 > configuration).
 >
 > _That_ crash would have been
 >
 > (gdb) bt
 > #0  0xb7fdd424 in __kernel_vsyscall ()
 > #1  0xb69460c6 in raise (sig=sig@entry=6)
 >     at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:37
 > #2  0x08124299 in terminate_due_to_signal (sig=sig@entry=6,
 >     backtrace_limit=backtrace_limit@entry=40) at ../../emacs/src/emacs.c:387
 > #3  0x0813cef7 in emacs_abort () at ../../emacs/src/sysdep.c:2198
 > #4  0x080f3e38 in XTredeem_scroll_bar (w=0x8752f30)
 >     at ../../emacs/src/xterm.c:5948

Nicolas Avrutin wrote:

 > I'm also experiencing this issue and would be happy to help you with
 > testing. I'm also using gtk3 and --without-toolkit-scroll-bars. I can
 > trigger the crash by running (sauron-start)[1] or
 > (jabber-connect-all)[2], in xmonad sending any emacs frame to a
 > different workspace, and then going to the workspace to which I sent the
 > frame.
 >
 > I have applied your patch and the crash still occurs. Here is my
 > backtrace after running it through addr2line[3]:
 >
 > emacs_backtrace at emacs-git/src/sysdep.c:2182
 > terminate_due_to_signal at emacs-git/src/emacs.c:381
 > emacs_open at emacs-git/src/sysdep.c:2211
 > XTredeem_scroll_bar at emacs-git/src/xterm.c:5971

Faried Nawaz wrote:

 > I'm not on the mailing list, and I'm not sure where to report bugs, but I
 > ran into the same crash as David Kastrup today, after I pulled and built
 > from trunk.  Your patch in
 > http://lists.gnu.org/archive/html/emacs-devel/2014-07/msg00373.html doesn't
 > fix the problem for me.
 >
 > I'm not sure how to reliably trigger the problem, but this usually works
 > for me.  I start Emacs under gdb, with -Q, and then evaluate these lines:
 >
 > (require 'package)
 > (setq package-archives '(("gnu" . "http://elpa.gnu.org/packages/")
 >                           ("marmalade" . "http://marmalade-repo.org/packages/
 > ")
 >                           ("melpa" . "http://melpa.milkbox.net/packages/")))
 > (package-initialize)
 >
 > I run M-x list-packages RET and switch away to another virtual desktop.
 > Some combination of switching away/switching back, or partially covering
 > the frame with an xterm before switching causes the crash for me.  It might
 > be timer related, too -- it doesn't happen immediately, but after a while.
 > It takes a while to fetch the packages list.
 >
 > The backtrace is at https://gist.github.com/faried/f1a01fac78a790f32ebe
 >
 > I use Ubuntu 12.04 (fully updated, 32-bit) and I compile Emacs with
 >
 > ./configure --without-pop --with-x-toolkit=lucid \
 >      --prefix=/usr/local/src --without-toolkit-scroll-bars \
 >      --enable-link-time-optimization --without-compress-install \
 >      --with-file-notification=yes
 >
 > I hope this helps locate the cause of the problem.

Please try the attached patch and tell me whether the problem persists.

Thank you, martin