GIMP crashed randomly

[david riedler]

GIMP randomly crashed on Ubuntu 19.10, and this bug report got generated:
```
GNU Image Manipulation Program version 2.10.8
git-describe: GIMP_2_10_6-294-ga967e8d2c2
C compiler:
 Using built-in specs.
 COLLECT_GCC=gcc
 COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
 OFFLOAD_TARGET_NAMES=nvptx-none
 OFFLOAD_TARGET_DEFAULT=1
 Target: x86_64-linux-gnu
 Configured with: ../src/configure -v --with-pkgversion='Ubuntu 8.2.0-13ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-8 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
 Thread model: posix
 gcc version 8.2.0 (Ubuntu 8.2.0-13ubuntu1)

using GEGL version 0.4.14 (compiled against version 0.4.12)
using GLib version 2.62.1 (compiled against version 2.58.1)
using GdkPixbuf version 2.40.0 (compiled against version 2.38.0)
using GTK+ version 2.24.32 (compiled against version 2.24.32)
using Pango version 1.42.3 (compiled against version 1.42.3)
using Fontconfig version 2.13.1 (compiled against version 2.13.0)
using Cairo version 1.16.0 (compiled against version 1.16.0)

```
> fatal error: Aborted

Stack trace:
```

# Stack traces obtained from PID 11836 - Thread 11836 #

[New LWP 11837]
[New LWP 11838]
[New LWP 11839]
[New LWP 11843]
[New LWP 11844]
[New LWP 11848]
[New LWP 11849]
[New LWP 11850]
[New LWP 11851]
[New LWP 11876]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
__libc_read (nbytes=256, buf=0x7ffe7487f390, fd=17) at ../sysdeps/unix/sysv/linux/read.c:26
  Id Target Id Frame
* 1 Thread 0x7f262d2abe00 (LWP 11836) "gimp-2.10" __libc_read (nbytes=256, buf=0x7ffe7487f390, fd=17) at ../sysdeps/unix/sysv/linux/read.c:26
  2 Thread 0x7f262caea700 (LWP 11837) "worker" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  3 Thread 0x7f262c2e9700 (LWP 11838) "worker" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  4 Thread 0x7f262bae8700 (LWP 11839) "worker" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  5 Thread 0x7f261b7fe700 (LWP 11843) "gmain" 0x00007f262e24dc2f in __GI___poll (fds=0x56328c982f70, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
  6 Thread 0x7f261bfff700 (LWP 11844) "gdbus" 0x00007f262e24dc2f in __GI___poll (fds=0x56328c999720, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
  7 Thread 0x7f2601427700 (LWP 11848) "async" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  8 Thread 0x7f2600c26700 (LWP 11849) "worker" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  9 Thread 0x7f2600425700 (LWP 11850) "worker" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  10 Thread 0x7f25ffc24700 (LWP 11851) "worker" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  11 Thread 0x7f25ff423700 (LWP 11876) "swap writer" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38

Thread 11 (Thread 0x7f25ff423700 (LWP 11876)):
#0 0x00007f262e25394d in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f262e540d83 in g_cond_wait () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f262e9fe799 in () at /usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0
#3 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801173047040, -7302784849040846007, 140730853484190, 140730853484191, 140730853484336, 139801173043456, 7272386902644282185, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#5 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f25ffc24700 (LWP 11851)):
#0 0x00007f262e25394d in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f262e540d83 in g_cond_wait () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x000056328b501423 in ()
#3 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801181439744, -7302784849040846007, 140730853489966, 140730853489967, 140730853490112, 139801181436160, 7272385802595783497, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#5 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f2600425700 (LWP 11850)):
#0 0x00007f262e25394d in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f262e540d83 in g_cond_wait () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x000056328b501423 in ()
#3 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801189832448, -7302784849040846007, 140730853489966, 140730853489967, 140730853490112, 139801189828864, 7271988880508769097, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#5 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f2600c26700 (LWP 11849)):
#0 0x00007f262e25394d in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f262e540d83 in g_cond_wait () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x000056328b501423 in ()
#3 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801198225152, -7302784849040846007, 140730853489966, 140730853489967, 140730853490112, 139801198221568, 7271987780460270409, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#5 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f2601427700 (LWP 11848)):
#0 0x00007f262e25394d in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f262e540d83 in g_cond_wait () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x000056328b50166c in ()
#3 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801206617856, -7302784849040846007, 140730853489982, 140730853489983, 140730853490128, 139801206614272, 7271986682559255369, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#5 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f261bfff700 (LWP 11844)):
#0 0x00007f262e24dc2f in __GI___poll (fds=0x56328c999720, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1 0x00007f262e4f4a3e in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f262e4f4dc3 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f262e8d659a in () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801655244544, -7302784849040846007, 140730853490078, 140730853490079, 140730853490224, 139801655240960, 7272042504249201481, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f261b7fe700 (LWP 11843)):
#0 0x00007f262e24dc2f in __GI___poll (fds=0x56328c982f70, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1 0x00007f262e4f4a3e in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f262e4f4b73 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f262e4f4bc1 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801646851840, -7302784849040846007, 140730853489662, 140730853489663, 140730853489808, 139801646848256, 7272043602150216521, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f262bae8700 (LWP 11839)):
#0 0x00007f262e25394d in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f262e540d83 in g_cond_wait () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f262e9c2993 in () at /usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0
#3 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801918342912, -7302784849040846007, 140730853489982, 140730853489983, 140730853490128, 139801918339328, 7271937375797826377, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#5 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f262c2e9700 (LWP 11838)):
#0 0x00007f262e25394d in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f262e540d83 in g_cond_wait () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f262e9c2993 in () at /usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0
#3 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801926735616, -7302784849040846007, 140730853489982, 140730853489983, 140730853490128, 139801926732032, 7271927473213854537, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#5 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f262caea700 (LWP 11837)):
#0 0x00007f262e25394d in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f262e540d83 in g_cond_wait () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f262e9c2993 in () at /usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0
#3 0x00007f262e51e111 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f262e334669 in start_thread (arg=<optimised out>) at pthread_create.c:479
        ret = <optimised out>
        pd = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139801935128320, -7302784849040846007, 140730853489982, 140730853489983, 140730853490128, 139801935124736, 7271926373165355849, 7271932109574558537}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#5 0x00007f262e25a323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f262d2abe00 (LWP 11836)):
#0 0x00007f262e33f31c in __libc_read (nbytes=256, buf=0x7ffe7487f390, fd=17) at ../sysdeps/unix/sysv/linux/read.c:26
        resultvar = 18446744073709551104
        sc_cancel_oldtype = 1
#1 0x00007f262e33f31c in __libc_read (fd=17, buf=0x7ffe7487f390, nbytes=256) at ../sysdeps/unix/sysv/linux/read.c:24
#2 0x00007f262ee327d4 in gimp_stack_trace_print () at /usr/lib/libgimpbase-2.0.so.0
#3 0x000056328b23c4a0 in ()
#4 0x000056328b23c8d8 in ()
#5 0x000056328b23d037 in ()
#6 0x00007f262e340540 in <signal handler called> () at /lib/x86_64-linux-gnu/libpthread.so.0
#7 0x00007f262e17e3eb in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
        set = {__val = {0, 139801959159936, 94776970805248, 94775176387280, 94775176387381, 94775176387280, 94775176387280, 94775176387383, 94775176387580, 94775176387280, 94775176387580, 0, 0, 0, 0, 0}}
        pid = <optimised out>
        tid = <optimised out>
#8 0x00007f262e15d899 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x6, sa_sigaction = 0x6}, sa_mask = {__val = {103, 4, 47244640256, 0, 0, 139801960309870, 0, 21474836480, 140730853489600, 140728898420736, 139801960340304, 0, 7432037930590226432, 139801960309870, 139801457192960, 139801960325048}}, sa_flags = 772437619, sa_restorer = 0x104}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#9 0x00007f262e15d769 in __assert_fail_base (fmt=0x7f262e2f1fb8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x7f262e0a7808 "!xcb_xlib_threads_sequence_lost", file=0x7f262e0a7673 "../../src/xcb_io.c", line=260, function=<optimised out>) at assert.c:92
        str = 0x56328e81ccf0 "0"
        total = 4096
#10 0x00007f262e16f006 in __GI___assert_fail (assertion=0x7f262e0a7808 "!xcb_xlib_threads_sequence_lost", file=0x7f262e0a7673 "../../src/xcb_io.c", line=260, function=0x7f262e0a7ac0 "poll_for_event") at assert.c:101
#11 0x00007f262e033493 in () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#12 0x00007f262e03353d in () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#13 0x00007f262e03383a in _XEventsQueued () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#14 0x00007f262e025171 in XPending () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#15 0x00007f262eef33ef in () at /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#16 0x00007f262e4f4471 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007f262e4f49e2 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f262e4f4dc3 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x000056328b23bcb7 in app_run ()
#20 0x000056328b23b5b5 in main ()
[Inferior 1 (process 11836) detached]

```