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[Bug 1868516] [NEW] Eraser crash

To: ubuntustudio-bugs@xxxxxxxxxxxxxxxxxxx
From: Azza <1868516@xxxxxxxxxxxxxxxxxx>
Date: Mon, 23 Mar 2020 04:14:06 -0000
Reply-to: Bug 1868516 <1868516@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

```
GNU Image Manipulation Program version 2.10.14
git-describe: GIMP_2_10_12-511-ga4f55d6c7e
C compiler:
	Using built-in specs.
	COLLECT_GCC=gcc
	COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
	OFFLOAD_TARGET_NAMES=nvptx-none
	OFFLOAD_TARGET_DEFAULT=1
	Target: x86_64-linux-gnu
	Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.4.0-1ubuntu1~18.04.1' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --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 --with-sysroot=/ --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 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1) 

using babl version 0.1.72 (compiled against version 0.1.72)
using GEGL version 0.4.18 (compiled against version 0.4.18)
using GLib version 2.56.4 (compiled against version 2.56.4)
using GdkPixbuf version 2.36.11 (compiled against version 2.36.11)
using GTK+ version 2.24.32 (compiled against version 2.24.32)
using Pango version 1.40.14 (compiled against version 1.40.14)
using Fontconfig version 2.12.6 (compiled against version 2.12.6)
using Cairo version 1.15.10 (compiled against version 1.15.10)

```
> fatal error: Aborted

Stack trace:
```

# Stack traces obtained from PID 24266 - Thread 24266 #

[New LWP 24270]
[New LWP 24271]
[New LWP 24272]
[New LWP 24281]
[New LWP 24376]
[New LWP 25257]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f79f23d4384 in __libc_read (fd=16, buf=0x7ffe09640350, nbytes=256) at ../sysdeps/unix/sysv/linux/read.c:27
  Id   Target Id         Frame 
* 1    Thread 0x7f79f7264e00 (LWP 24266) "gimp-2.10" 0x00007f79f23d4384 in __libc_read (fd=16, buf=0x7ffe09640350, nbytes=256) at ../sysdeps/unix/sysv/linux/read.c:27
  2    Thread 0x7f79e878a700 (LWP 24270) "worker" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  3    Thread 0x7f79e6232700 (LWP 24271) "gmain" 0x00007f79f20dfbf9 in __GI___poll (fds=0x55f77cfbf760, nfds=2, timeout=3997) at ../sysdeps/unix/sysv/linux/poll.c:29
  4    Thread 0x7f79e5a31700 (LWP 24272) "gdbus" 0x00007f79f20dfbf9 in __GI___poll (fds=0x55f77cfd6450, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
  5    Thread 0x7f79ca88a700 (LWP 24281) "async" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  6    Thread 0x7f79c8ca2700 (LWP 24376) "swap writer" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  7    Thread 0x7f79bad91700 (LWP 25257) "paint" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38

Thread 7 (Thread 0x7f79bad91700 (LWP 25257)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f79f2c1d77f in g_cond_wait () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x000055f77c230ccf in ?? ()
No symbol table info available.
#3  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f79f23ca6db in start_thread (arg=0x7f79bad91700) at pthread_create.c:463
        pd = 0x7f79bad91700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140160802559744, -5512187009858092090, 140160802556160, 0, 94521497135344, 140729055970496, 5581000817686791110, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#5  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.

Thread 6 (Thread 0x7f79c8ca2700 (LWP 24376)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f79f2c1d77f in g_cond_wait () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f79f429edad in ?? () from /usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0
No symbol table info available.
#3  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f79f23ca6db in start_thread (arg=0x7f79c8ca2700) at pthread_create.c:463
        pd = 0x7f79c8ca2700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161036461824, -5512187009858092090, 140161036458240, 0, 94521496401376, 140729055967344, 5580899517125018566, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#5  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.

Thread 5 (Thread 0x7f79ca88a700 (LWP 24281)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f79f2c1d77f in g_cond_wait () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x000055f77c46e36c in ?? ()
No symbol table info available.
#3  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f79f23ca6db in start_thread (arg=0x7f79ca88a700) at pthread_create.c:463
        pd = 0x7f79ca88a700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161065723648, -5512187009858092090, 140161065720064, 0, 94521443675456, 140729055973088, 5580894590797530054, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#5  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.

Thread 4 (Thread 0x7f79e5a31700 (LWP 24272)):
#0  0x00007f79f20dfbf9 in __GI___poll (fds=0x55f77cfd6450, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
#1  0x00007f79f2bd75c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f79f2bd7962 in g_main_loop_run () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f79f3d720e6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#4  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f79f23ca6db in start_thread (arg=0x7f79e5a31700) at pthread_create.c:463
        pd = 0x7f79e5a31700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161520441088, -5512187009858092090, 140161520437504, 0, 94521441220464, 140729055973168, 5580817937979327430, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#6  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.

Thread 3 (Thread 0x7f79e6232700 (LWP 24271)):
#0  0x00007f79f20dfbf9 in __GI___poll (fds=0x55f77cfbf760, nfds=2, timeout=3997) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
#1  0x00007f79f2bd75c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f79f2bd76dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f79f2bd7721 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f79f23ca6db in start_thread (arg=0x7f79e6232700) at pthread_create.c:463
        pd = 0x7f79e6232700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161528833792, -5512187009858092090, 140161528830208, 0, 94521441220304, 140729055972784, 5580816839004570566, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#6  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.

Thread 2 (Thread 0x7f79e878a700 (LWP 24270)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f79f2c1d77f in g_cond_wait () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f79f4266fc3 in ?? () from /usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0
No symbol table info available.
#3  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f79f23ca6db in start_thread (arg=0x7f79e878a700) at pthread_create.c:463
        pd = 0x7f79e878a700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161567991552, -5512187009858092090, 140161567987968, 0, 94521441219584, 140729055972976, 5580830681684165574, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#5  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.

Thread 1 (Thread 0x7f79f7264e00 (LWP 24266)):
#0  0x00007f79f23d4384 in __libc_read (fd=16, buf=0x7ffe09640350, nbytes=256) at ../sysdeps/unix/sysv/linux/read.c:27
        resultvar = 18446744073709551104
        sc_cancel_oldtype = 1
        sc_ret = <optimised out>
        sc_ret = <optimised out>
        nbytes = 256
        resultvar = <optimised out>
        resultvar = <optimised out>
        __arg2 = <optimised out>
        _a3 = <optimised out>
        resultvar = <optimised out>
        resultvar = <optimised out>
        __arg2 = <optimised out>
        _a3 = <optimised out>
        fd = 16
        __arg3 = <optimised out>
        __arg3 = <optimised out>
        buf = 0x7ffe09640350
        _a1 = <optimised out>
        _a1 = <optimised out>
        sc_ret = <optimised out>
        __arg1 = <optimised out>
        _a2 = <optimised out>
        sc_cancel_oldtype = <optimised out>
        __arg1 = <optimised out>
        _a2 = <optimised out>
        sc_ret = <optimised out>
        resultvar = <optimised out>
        resultvar = <optimised out>
        __arg3 = <optimised out>
        __arg2 = <optimised out>
        __arg1 = <optimised out>
        _a3 = <optimised out>
        _a2 = <optimised out>
        _a1 = <optimised out>
        sc_cancel_oldtype = <optimised out>
        resultvar = <optimised out>
        resultvar = <optimised out>
        __arg3 = <optimised out>
        __arg2 = <optimised out>
        __arg1 = <optimised out>
        _a3 = <optimised out>
        _a2 = <optimised out>
        _a1 = <optimised out>
#1  0x00007f79f587bda0 in gimp_stack_trace_print () from /usr/lib/libgimpbase-2.0.so.0
No symbol table info available.
#2  0x000055f77c199ab4 in ?? ()
No symbol table info available.
#3  0x000055f77c19a0b8 in gimp_fatal_error ()
No symbol table info available.
#4  0x000055f77c19a7c7 in ?? ()
No symbol table info available.
#5  <signal handler called>
No locals.
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
        set = {__val = {0, 94521477969968, 140161800450080, 140161728198207, 140161890222080, 94521477969968, 94521477970069, 94521477969968, 94521477969968, 94521477970071, 94521477970268, 94521477969968, 94521477970268, 0, 0, 0}}
        pid = <optimised out>
        tid = <optimised out>
        ret = <optimised out>
#7  0x00007f79f200b801 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x55f77ee09490, sa_sigaction = 0x55f77ee09490}, sa_mask = {__val = {0, 0, 110, 0, 0, 140729055972728, 0, 140729055972560, 140161729454544, 21474836480, 140161729439704, 0, 3192576775830473216, 140161729424660, 0, 140161729439704}}, sa_flags = -239886669, sa_restorer = 0x7f79f1b3a048}
        sigs = {__val = {32, 0 <repeats 15 times>}}
        __cnt = <optimised out>
        __set = <optimised out>
        __cnt = <optimised out>
        __set = <optimised out>
#8  0x00007f79f1ffb39a in __assert_fail_base (fmt=0x7f79f21827d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f79f1b3a048 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7f79f1b39eb3 "../../src/xcb_io.c", line=line@entry=259, function=function@entry=0x7f79f1b3a2f8 "poll_for_event") at assert.c:92
        str = 0x55f77ee09490 ""
        total = 4096
#9  0x00007f79f1ffb412 in __GI___assert_fail (assertion=0x7f79f1b3a048 "!xcb_xlib_threads_sequence_lost", file=0x7f79f1b39eb3 "../../src/xcb_io.c", line=259, function=0x7f79f1b3a2f8 "poll_for_event") at assert.c:101
No locals.
#10 0x00007f79f1ac8e7a in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#11 0x00007f79f1ac8f1e in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#12 0x00007f79f1ac920d in _XEventsQueued () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#13 0x00007f79f1abad3d in XPending () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#14 0x00007f79f653b085 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
No symbol table info available.
#15 0x00007f79f2bd6fe1 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#16 0x00007f79f2bd7570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#17 0x00007f79f2bd7962 in g_main_loop_run () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#18 0x000055f77c199470 in app_run ()
No symbol table info available.
#19 0x000055f77c198d3c in main ()
No symbol table info available.

```

** Affects: gimp (Ubuntu)
     Importance: Undecided
         Status: New

-- 
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https://bugs.launchpad.net/bugs/1868516

Title:
  Eraser crash

Status in gimp package in Ubuntu:
  New

Bug description:
  ```
  GNU Image Manipulation Program version 2.10.14
  git-describe: GIMP_2_10_12-511-ga4f55d6c7e
  C compiler:
  	Using built-in specs.
  	COLLECT_GCC=gcc
  	COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
  	OFFLOAD_TARGET_NAMES=nvptx-none
  	OFFLOAD_TARGET_DEFAULT=1
  	Target: x86_64-linux-gnu
  	Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.4.0-1ubuntu1~18.04.1' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --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 --with-sysroot=/ --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 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1) 

  using babl version 0.1.72 (compiled against version 0.1.72)
  using GEGL version 0.4.18 (compiled against version 0.4.18)
  using GLib version 2.56.4 (compiled against version 2.56.4)
  using GdkPixbuf version 2.36.11 (compiled against version 2.36.11)
  using GTK+ version 2.24.32 (compiled against version 2.24.32)
  using Pango version 1.40.14 (compiled against version 1.40.14)
  using Fontconfig version 2.12.6 (compiled against version 2.12.6)
  using Cairo version 1.15.10 (compiled against version 1.15.10)

  ```
  > fatal error: Aborted

  Stack trace:
  ```

  # Stack traces obtained from PID 24266 - Thread 24266 #

  [New LWP 24270]
  [New LWP 24271]
  [New LWP 24272]
  [New LWP 24281]
  [New LWP 24376]
  [New LWP 25257]
  [Thread debugging using libthread_db enabled]
  Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
  0x00007f79f23d4384 in __libc_read (fd=16, buf=0x7ffe09640350, nbytes=256) at ../sysdeps/unix/sysv/linux/read.c:27
    Id   Target Id         Frame 
  * 1    Thread 0x7f79f7264e00 (LWP 24266) "gimp-2.10" 0x00007f79f23d4384 in __libc_read (fd=16, buf=0x7ffe09640350, nbytes=256) at ../sysdeps/unix/sysv/linux/read.c:27
    2    Thread 0x7f79e878a700 (LWP 24270) "worker" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
    3    Thread 0x7f79e6232700 (LWP 24271) "gmain" 0x00007f79f20dfbf9 in __GI___poll (fds=0x55f77cfbf760, nfds=2, timeout=3997) at ../sysdeps/unix/sysv/linux/poll.c:29
    4    Thread 0x7f79e5a31700 (LWP 24272) "gdbus" 0x00007f79f20dfbf9 in __GI___poll (fds=0x55f77cfd6450, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
    5    Thread 0x7f79ca88a700 (LWP 24281) "async" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
    6    Thread 0x7f79c8ca2700 (LWP 24376) "swap writer" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
    7    Thread 0x7f79bad91700 (LWP 25257) "paint" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38

  Thread 7 (Thread 0x7f79bad91700 (LWP 25257)):
  #0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  No locals.
  #1  0x00007f79f2c1d77f in g_cond_wait () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #2  0x000055f77c230ccf in ?? ()
  No symbol table info available.
  #3  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #4  0x00007f79f23ca6db in start_thread (arg=0x7f79bad91700) at pthread_create.c:463
          pd = 0x7f79bad91700
          now = <optimised out>
          unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140160802559744, -5512187009858092090, 140160802556160, 0, 94521497135344, 140729055970496, 5581000817686791110, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
          not_first_call = <optimised out>
  #5  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
  No locals.

  Thread 6 (Thread 0x7f79c8ca2700 (LWP 24376)):
  #0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  No locals.
  #1  0x00007f79f2c1d77f in g_cond_wait () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #2  0x00007f79f429edad in ?? () from /usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0
  No symbol table info available.
  #3  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #4  0x00007f79f23ca6db in start_thread (arg=0x7f79c8ca2700) at pthread_create.c:463
          pd = 0x7f79c8ca2700
          now = <optimised out>
          unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161036461824, -5512187009858092090, 140161036458240, 0, 94521496401376, 140729055967344, 5580899517125018566, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
          not_first_call = <optimised out>
  #5  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
  No locals.

  Thread 5 (Thread 0x7f79ca88a700 (LWP 24281)):
  #0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  No locals.
  #1  0x00007f79f2c1d77f in g_cond_wait () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #2  0x000055f77c46e36c in ?? ()
  No symbol table info available.
  #3  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #4  0x00007f79f23ca6db in start_thread (arg=0x7f79ca88a700) at pthread_create.c:463
          pd = 0x7f79ca88a700
          now = <optimised out>
          unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161065723648, -5512187009858092090, 140161065720064, 0, 94521443675456, 140729055973088, 5580894590797530054, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
          not_first_call = <optimised out>
  #5  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
  No locals.

  Thread 4 (Thread 0x7f79e5a31700 (LWP 24272)):
  #0  0x00007f79f20dfbf9 in __GI___poll (fds=0x55f77cfd6450, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
          resultvar = 18446744073709551100
          sc_cancel_oldtype = 0
          sc_ret = <optimised out>
  #1  0x00007f79f2bd75c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #2  0x00007f79f2bd7962 in g_main_loop_run () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #3  0x00007f79f3d720e6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
  No symbol table info available.
  #4  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #5  0x00007f79f23ca6db in start_thread (arg=0x7f79e5a31700) at pthread_create.c:463
          pd = 0x7f79e5a31700
          now = <optimised out>
          unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161520441088, -5512187009858092090, 140161520437504, 0, 94521441220464, 140729055973168, 5580817937979327430, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
          not_first_call = <optimised out>
  #6  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
  No locals.

  Thread 3 (Thread 0x7f79e6232700 (LWP 24271)):
  #0  0x00007f79f20dfbf9 in __GI___poll (fds=0x55f77cfbf760, nfds=2, timeout=3997) at ../sysdeps/unix/sysv/linux/poll.c:29
          resultvar = 18446744073709551100
          sc_cancel_oldtype = 0
          sc_ret = <optimised out>
  #1  0x00007f79f2bd75c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #2  0x00007f79f2bd76dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #3  0x00007f79f2bd7721 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #4  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #5  0x00007f79f23ca6db in start_thread (arg=0x7f79e6232700) at pthread_create.c:463
          pd = 0x7f79e6232700
          now = <optimised out>
          unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161528833792, -5512187009858092090, 140161528830208, 0, 94521441220304, 140729055972784, 5580816839004570566, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
          not_first_call = <optimised out>
  #6  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
  No locals.

  Thread 2 (Thread 0x7f79e878a700 (LWP 24270)):
  #0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  No locals.
  #1  0x00007f79f2c1d77f in g_cond_wait () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #2  0x00007f79f4266fc3 in ?? () from /usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0
  No symbol table info available.
  #3  0x00007f79f2bff195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #4  0x00007f79f23ca6db in start_thread (arg=0x7f79e878a700) at pthread_create.c:463
          pd = 0x7f79e878a700
          now = <optimised out>
          unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140161567991552, -5512187009858092090, 140161567987968, 0, 94521441219584, 140729055972976, 5580830681684165574, 5580843291762934726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
          not_first_call = <optimised out>
  #5  0x00007f79f20ec88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
  No locals.

  Thread 1 (Thread 0x7f79f7264e00 (LWP 24266)):
  #0  0x00007f79f23d4384 in __libc_read (fd=16, buf=0x7ffe09640350, nbytes=256) at ../sysdeps/unix/sysv/linux/read.c:27
          resultvar = 18446744073709551104
          sc_cancel_oldtype = 1
          sc_ret = <optimised out>
          sc_ret = <optimised out>
          nbytes = 256
          resultvar = <optimised out>
          resultvar = <optimised out>
          __arg2 = <optimised out>
          _a3 = <optimised out>
          resultvar = <optimised out>
          resultvar = <optimised out>
          __arg2 = <optimised out>
          _a3 = <optimised out>
          fd = 16
          __arg3 = <optimised out>
          __arg3 = <optimised out>
          buf = 0x7ffe09640350
          _a1 = <optimised out>
          _a1 = <optimised out>
          sc_ret = <optimised out>
          __arg1 = <optimised out>
          _a2 = <optimised out>
          sc_cancel_oldtype = <optimised out>
          __arg1 = <optimised out>
          _a2 = <optimised out>
          sc_ret = <optimised out>
          resultvar = <optimised out>
          resultvar = <optimised out>
          __arg3 = <optimised out>
          __arg2 = <optimised out>
          __arg1 = <optimised out>
          _a3 = <optimised out>
          _a2 = <optimised out>
          _a1 = <optimised out>
          sc_cancel_oldtype = <optimised out>
          resultvar = <optimised out>
          resultvar = <optimised out>
          __arg3 = <optimised out>
          __arg2 = <optimised out>
          __arg1 = <optimised out>
          _a3 = <optimised out>
          _a2 = <optimised out>
          _a1 = <optimised out>
  #1  0x00007f79f587bda0 in gimp_stack_trace_print () from /usr/lib/libgimpbase-2.0.so.0
  No symbol table info available.
  #2  0x000055f77c199ab4 in ?? ()
  No symbol table info available.
  #3  0x000055f77c19a0b8 in gimp_fatal_error ()
  No symbol table info available.
  #4  0x000055f77c19a7c7 in ?? ()
  No symbol table info available.
  #5  <signal handler called>
  No locals.
  #6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
          set = {__val = {0, 94521477969968, 140161800450080, 140161728198207, 140161890222080, 94521477969968, 94521477970069, 94521477969968, 94521477969968, 94521477970071, 94521477970268, 94521477969968, 94521477970268, 0, 0, 0}}
          pid = <optimised out>
          tid = <optimised out>
          ret = <optimised out>
  #7  0x00007f79f200b801 in __GI_abort () at abort.c:79
          save_stage = 1
          act = {__sigaction_handler = {sa_handler = 0x55f77ee09490, sa_sigaction = 0x55f77ee09490}, sa_mask = {__val = {0, 0, 110, 0, 0, 140729055972728, 0, 140729055972560, 140161729454544, 21474836480, 140161729439704, 0, 3192576775830473216, 140161729424660, 0, 140161729439704}}, sa_flags = -239886669, sa_restorer = 0x7f79f1b3a048}
          sigs = {__val = {32, 0 <repeats 15 times>}}
          __cnt = <optimised out>
          __set = <optimised out>
          __cnt = <optimised out>
          __set = <optimised out>
  #8  0x00007f79f1ffb39a in __assert_fail_base (fmt=0x7f79f21827d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f79f1b3a048 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7f79f1b39eb3 "../../src/xcb_io.c", line=line@entry=259, function=function@entry=0x7f79f1b3a2f8 "poll_for_event") at assert.c:92
          str = 0x55f77ee09490 ""
          total = 4096
  #9  0x00007f79f1ffb412 in __GI___assert_fail (assertion=0x7f79f1b3a048 "!xcb_xlib_threads_sequence_lost", file=0x7f79f1b39eb3 "../../src/xcb_io.c", line=259, function=0x7f79f1b3a2f8 "poll_for_event") at assert.c:101
  No locals.
  #10 0x00007f79f1ac8e7a in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
  No symbol table info available.
  #11 0x00007f79f1ac8f1e in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
  No symbol table info available.
  #12 0x00007f79f1ac920d in _XEventsQueued () from /usr/lib/x86_64-linux-gnu/libX11.so.6
  No symbol table info available.
  #13 0x00007f79f1abad3d in XPending () from /usr/lib/x86_64-linux-gnu/libX11.so.6
  No symbol table info available.
  #14 0x00007f79f653b085 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
  No symbol table info available.
  #15 0x00007f79f2bd6fe1 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #16 0x00007f79f2bd7570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #17 0x00007f79f2bd7962 in g_main_loop_run () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  No symbol table info available.
  #18 0x000055f77c199470 in app_run ()
  No symbol table info available.
  #19 0x000055f77c198d3c in main ()
  No symbol table info available.

  ```

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Follow ups

[Bug 1868516] Re: Eraser crash
From: Chris Guiver, 2020-03-23