Hello,I believe I am experiencing the same issue. It may be causing problems with x11rb; see related issue with Zed <https://github.com/zed-industries/zed/issues/29083#issuecomment-2907005604> which led me to look in this direction.
I have followed the "HowToGetABacktrace" page and installed debug symbols that I think are relevant. I have a bunch of coredumps available via systemd-coredump.
Here's my dmesg segfault:[ 284.036140] ibus-x11[2813]: segfault at 2ce ip 00007f0c79604356 sp 00007ffe766e79b0 error 4 in libgdk-3.so.0.2417.32[9c356,7f0c79596000+87000] likely on CPU 5 (core 2, socket 0) [ 284.036175] Code: 4c 89 0c 24 e8 db f0 ff ff 44 8b 54 24 18 41 81 e2 ff 9f ff ff 45 09 d4 44 3a 68 0c 0f 82 c2 01 00 00 48 8b 78 20 41 0f b6 cd <48> 8b 57 20 48 8d 0c ca 44 0f b6 41 04 44 89 c6 83 e6 0f 44 38 68
Here's the info for the coredump I'll show the backtrace of below: PID: 2887 (ibus-x11) UID: 1000 (matt) GID: 1000 (matt) Signal: 6 (ABRT) Timestamp: Sun 2025-05-25 11:03:15 ADT (22min ago) Command Line: /usr/libexec/ibus-x11 --kill-daemon Executable: /usr/libexec/ibus-x11 Control Group: /user.slice/user-1000.slice/session-3.scope Unit: session-3.scope Slice: user-1000.slice Session: 3 Owner UID: 1000 (matt) Boot ID: ------ Machine ID: ----- Hostname: ------Storage: /var/lib/systemd/coredump/core.ibus-x11.1000.e378e9f2f3cb4de889a510235a84ae60.2887.1748181795000000.zst (present)
Size on Disk: 1.6M Message: Process 2887 (ibus-x11) of user 1000 dumped core. Here's a backtrace from the same: (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 0x00007f019578d9ff in __pthread_kill_internal (threadid=<optimized out>, signo=6)
at ./nptl/pthread_kill.c:89#2 0x00007f0195738cc2 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#3 0x00007f01957214ac in __GI_abort () at ./stdlib/abort.c:73#4 0x00007f0195722291 in __libc_message_impl (fmt=fmt@entry=0x7f01958a432d "%s\n")
at ../sysdeps/posix/libc_fatal.c:134 #5 0x00007f0195797465 in malloc_printerr(str=str@entry=0x7f01958a74d0 "corrupted size vs. prev_size in fastbins") at ./malloc/malloc.c:5829 #6 0x00007f019579802c in malloc_consolidate (av=av@entry=0x7f01958e0ac0 <main_arena>)
at ./malloc/malloc.c:4924#7 0x00007f019579a858 in _int_malloc (av=av@entry=0x7f01958e0ac0 <main_arena>, bytes=bytes@entry=2560)
at ./malloc/malloc.c:4099#8 0x00007f019579cf47 in __libc_calloc (n=n@entry=2560, elem_size=elem_size@entry=1)
at ./malloc/malloc.c:3844 #9 0x00005616353bf94b in _Xi18nChangeIC --Type <RET> for more, q to quit, c to continue without paging--(ims=ims@entry=0x56164b8ae4d0, call_data=call_data@entry=0x7ffdd1fb72c0, p=p@entry=0x56164ba744c4 "\001",
create_flag=create_flag@entry=0) at ./util/IMdkit/i18nIc.c:697 #10 0x00005616353bdebc in SetICValuesMessageProc(ims=0x56164b8ae4d0, call_data=0x7ffdd1fb72c0, p=0x56164ba744c4 "\001") at ./util/IMdkit/i18nPtHdr.c:923
#11 _Xi18nMessageHandler(ims=ims@entry=0x56164b8ae4d0, connect_id=1, p=p@entry=0x56164ba744c0 "6", delete=delete@entry=0x7ffdd1fb7
510) at ./util/IMdkit/i18nPtHdr.c:1849 #12 0x00005616353b7f3b in WaitXIMProtocol(dpy=<optimized out>, win=<optimized out>, ev=<optimized out>, client_data=0x56164b8ae4d0 "@a<5\026V")
at ./util/IMdkit/i18nX.c:524#13 0x00007f0195c923d6 in _gdk_x11_display_queue_events (display=0x56164b7fdb00 [GdkX11Display])
at ../../../gdk/x11/gdkeventsource.c:337#14 0x00007f0195c36e24 in gdk_display_get_event (display=display@entry=0x56164b7fdb00 [GdkX11Display])
at ../../../gdk/gdkdisplay.c:442 #15 0x00007f0195c92216 in gdk_event_source_dispatch(source=<optimized out>, callback=<optimized out>, user_data=<optimized out>)
at ../../../gdk/x11/gdkeventsource.c:363#16 0x00007f0195a9c345 in g_main_dispatch (context=context@entry=0x56164b8a0000)
at ../../../glib/gmain.c:3398#17 0x00007f0195a9e577 in g_main_context_dispatch_unlocked (context=0x56164b8a0000)
at ../../../glib/gmain.c:4249 #18 g_main_context_iterate_unlocked(context=0x56164b8a0000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
at ../../../glib/gmain.c:4314#19 0x00007f0195a9efdf in g_main_loop_run (loop=0x7f01580025f0) at ../../../glib/gmain.c:4516
#20 0x00007f0195d4d650 in ibus_main () at ./src/ibusshare.c:415#21 0x00005616353b2c7c in main (argc=<optimized out>, argv=<optimized out>) at ./client/x11/main.c:1456
-- *Matthew Scheffel* | Software Developer 52 Townshend Avenue, Amherst, Nova Scotia, B4H 4N6 *Cell*: 1 (647) 230-4773 *E-mail*: m...@dataheck.com DATAHECK.COM | 🦀 🐍
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