Package: libx11-6 Version: 2:1.8.4-2 I have frequent fvwm window manager crashes due to an assertion in libX11 that causes a SIGABRT and window manager crash. This bug is related to #1032379, if you go down to the thread it is triggered by the same assertion. I do not use a desktop environment, I just start X by using startx and use the fvwm2 window manager. The message printed from fvwm is:
fvwm: ../../src/xcb_io.c:626: _XAllocID: Assertion `ret != inval_id' failed. I can reliably crash the window manager by doing some mouse actions in the root window (minimize, maximize windows, resize windows). I have reverted the following packages to 2:1.8.3-3 and no failures happen any more, even after intensive stress tests: libx11-6 libx11-data libx11-dev libx11-xcb-dev libx11-xcb1 Backtrace of failed fvwm process follows. Thank you. Stefan This is the backtrace of the failed fvwm process: (gdb) run Starting program: /usr/bin/fvwm [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Detaching after fork from child process 4851] [Detaching after vfork from child process 4864] Warning: Arg --fvwm-icons is obsolete and ignored Python module python-xdg not found.fvwm: ../../src/xcb_io.c:626: _XAllocID: Assertion `ret != inval_id' failed. Program received signal SIGABRT, Aborted. __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44 44 ./nptl/pthread_kill.c: No such file or directory. (gdb) bt #0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44 #1 0x00007ffff6ca9d2f in __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78 #2 0x00007ffff6c5aef2 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26 #3 0x00007ffff6c45472 in __GI_abort () at ./stdlib/abort.c:79 #4 0x00007ffff6c45395 in __assert_fail_base (fmt=0x7ffff6db9a70 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7ffff7b75b2a "ret != inval_id", file=file@entry=0x7ffff7b75a9b "../../src/xcb_io.c", line=line@entry=626, function=function@entry=0x7ffff7b75ef0 "_XAllocID") at ./assert/assert.c:92 #5 0x00007ffff6c53df2 in __GI___assert_fail (assertion=0x7ffff7b75b2a "ret != inval_id", file=0x7ffff7b75a9b "../../src/xcb_io.c", line=626, function=0x7ffff7b75ef0 "_XAllocID") at ./assert/assert.c:101 #6 0x00007ffff7b02443 in () at /usr/lib/x86_64-linux-gnu/libX11.so.6 #7 0x00007ffff7e56558 in XRenderCreatePicture () at /usr/lib/x86_64-linux-gnu/libXrender.so.1 #8 0x00007ffff7f9e5b6 in () at /usr/lib/x86_64-linux-gnu/libXft.so.2 #9 0x00007ffff7f9ec95 in XftDrawGlyphs () at /usr/lib/x86_64-linux-gnu/libXft.so.2 #10 0x00007ffff7f9f2ad in XftDrawStringUtf8 () at /usr/lib/x86_64-linux-gnu/libXft.so.2 #11 0x00005555555ff843 in () #12 0x00005555555e6dfb in () #13 0x00005555555a5fff in () #14 0x00005555555a7ba4 in () #15 0x0000555555588dba in () #16 0x000055555558c4eb in () #17 0x000055555558c66c in () #18 0x0000555555600189 in () #19 0x000055555560020f in () #20 0x00007ffff7add9da in XCheckIfEvent () at /usr/lib/x86_64-linux-gnu/libX11.so.6 #21 0x0000555555600b62 in () #22 0x0000555555600cb7 in () #23 0x000055555558d58a in () #24 0x00005555555bfb2f in () #25 0x00005555555a92ca in () #26 0x00005555555a9bf4 in () #27 0x00005555555c7f29 in () #28 0x0000555555589d43 in () #29 0x000055555558c4eb in () #30 0x000055555558c5e4 in () #31 0x00005555555674f7 in () #32 0x00007ffff6c4618a in __libc_start_call_main (main=main@entry=0x555555565a90, argc=argc@entry=1, argv=argv@entry=0x7fffffffe4d8) at ../sysdeps/nptl/libc_start_call_main.h:58 #33 0x00007ffff6c46245 in __libc_start_main_impl (main=0x555555565a90, argc=1, argv=0x7fffffffe4d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe4c8) at ../csu/libc-start.c:381 #34 0x0000555555568631 in () (gdb)