Re: [Bug: 21.4.21] Segfault on reading png

On Thu, 26 Jun 2008 14:20:07 +0200, Aidan wrote: > Your crash and that commit should be independent; the problem fixed > triggered an assertion failure on debug builds (normally the beta > ones), and your build isn’t a debug build, I guess. (The > report-xemacs-bug mail seems to have been lost to the aether :-/ ) . I reported the bug with the stock Ubuntu 8.04 XEmacs packages at first. From the feedback I got, I built libpng and XEmacs with debug nostrip noopt and reproduced the crash and reported that. > If you have compiled XEmacs yourself--which is necessary to avoid the > other bug you reported--use the debug flags, and provoke the problem > with GDB. The exact line number of where things are going wrong would > be real help. Is this following good, or do I need to do something more? $ file /usr/bin/xemacs /etc/alternatives/xemacs /usr/bin/xemacs21 /etc/alternatives/xemacs21 /usr/bin/xemacs21-mule /usr/bin/xemacs-21.4.21-mule /usr/bin/xemacs: symbolic link to `/etc/alternatives/xemacs' /etc/alternatives/xemacs: symbolic link to `/usr/bin/xemacs21' /usr/bin/xemacs21: symbolic link to `/etc/alternatives/xemacs21' /etc/alternatives/xemacs21: symbolic link to `/usr/bin/xemacs21-mule' /usr/bin/xemacs21-mule: symbolic link to `xemacs-21.4.21-mule' /usr/bin/xemacs-21.4.21-mule: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), for GNU/Linux 2.6.8, dynamically linked (uses shared libs), not stripped $ ldd /usr/bin/xemacs | grep libpng libpng12.so.0 => /usr/lib/libpng12.so.0 (0x00002b7d5cf4f000) $ file /usr/lib/libpng12.so.0 /usr/lib/libpng12.so.0.27.0 /usr/lib/libpng12.so.0: symbolic link to `libpng12.so.0.27.0' /usr/lib/libpng12.so.0.27.0: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), not stripped $ ulimit -c unlimited $ xemacs --vanilla /usr/lib/xemacs-21.4.21/etc/custom/reset-up.png

Program terminated with signal 11, Segmentation fault. [New process 23617] #0 0x00002b14d59fd527 in kill () from /lib/libc.so.6 (gdb) where #0 0x00002b14d59fd527 in kill () from /lib/libc.so.6 #1 0x000000000048db5e in fatal_error_signal (sig=11) at emacs.c:642 #2 <signal handler called> #3 0x00002b14d5a42bcb in free () from /lib/libc.so.6 #4 0x00002b14d448d1c2 in ?? () from /usr/lib/libX11.so.6 #5 0x00000000005d434c in x_init_image_instance_from_eimage (ii=0xddd980, width=63, height=19, slices=1, eimage=0xdc8a60 "%G���������������������������������������������������������������������������������������������%＠}}{%G������%＠..., dest_mask=-1, instantiator=13665648, domain=13542112) at glyphs-x.c:988 #6 0x0000000000531f5a in png_instantiate (image_instance=<value optimized out>, instantiator=13665648, pointer_fg=<value optimized out>, pointer_bg=<value optimized out>, dest_mask=-1, domain=13542112) at glyphs-eimage.c:1045 #7 0x0000000000527983 in instantiate_image_instantiator (governing_domain=10795328, domain=13542112, instantiator=13665648, pointer_fg=47368518132976, pointer_bg=47368518132976, dest_mask=-1, glyph=47368518132976) at glyphs.c:776 #8 0x000000000052c1ab in make_image_instance_1 (data=13665648, domain=13542112, dest_types=47368518132976) at glyphs.c:1476