Bug#936064: gimp: Gimp crash using filling tool

[Stephane]

Hello Bernhard,

On Sat, 31 Aug 2019 15:29:17 +0200 =?UTF-8?Q?Bernhard_=c3=9cbelacker?= 
<bernhardu at mailbox.org> wrote:
> Dear Maintainer,
> this backtrace is identical to that one reported in #935604.
> Also the expected message appears in this report:
>     ...
>     "[xcb] Unknown sequence number while processing queue"
>     ....
> 
> This time I found also this upstream bugs that may be related:
>     https://gitlab.gnome.org/GNOME/gimp/issues/3076
>     https://gitlab.gnome.org/GNOME/gimp/issues/1475
> 
> @Stephane: By any chance, had you ClipIt running at the
>            time of the crash?

Yes.
ClipIt is running and it was last time too.
But I can-t see anything about gimp in CliIt.

Gimp just crashed again the same way filling another file.
I launched gimp this way:

script -a $PWD/gimp_$(date +%Y-%m-%d_%H-%M-%S).log -c "gimp --verbose"

and it ends this way:

[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has 
not been called
[xcb] Aborting, sorry about that.
gimp: ../../src/xcb_io.c:263: poll_for_event: Assertion 
`!xcb_xlib_threads_sequence_lost' failed.
gimp: fatal error: Aborted
/usr/lib/gimp/2.0/plug-ins/script-fu/script-fu terminated: Hangup

Bug information in Gimp Crash Debug window is:
===================================================
```
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/i686-linux-gnu/8/lto-wrapper
	Target: i686-linux-gnu
	Configured with: ../src/configure -v --with-pkgversion='Debian 
8.2.0-13' --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=i686-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-targets=all 
--enable-multiarch --disable-werror --with-arch-32=i686 
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic 
--enable-checking=release --build=i686-linux-gnu --host=i686-linux-gnu 
--target=i686-linux-gnu
	Thread model: posix
	gcc version 8.2.0 (Debian 8.2.0-13)
	
using GEGL version 0.4.16 (compiled against version 0.4.12)
using GLib version 2.58.3 (compiled against version 2.58.1)
using GdkPixbuf version 2.38.1 (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 2.13.1)
using Cairo version 1.16.0 (compiled against version 1.16.0)

```
 > fatal error: Aborted

Stack trace:
```
/usr/lib/libgimpbase-2.0.so.0(gimp_stack_trace_print+0x391)[0xb78b9461]
gimp(+0x8f61f)[0x49261f]
gimp(+0x8faa1)[0x492aa1]
gimp(+0x901cc)[0x4931cc]
linux-gate.so.1(__kernel_sigreturn+0x0)[0xb7faad7c]
linux-gate.so.1(__kernel_vsyscall+0x9)[0xb7faad71]
/lib/i386-linux-gnu/libc.so.6(gsignal+0xc2)[0xb6b90382]
/lib/i386-linux-gnu/libc.so.6(abort+0xf0)[0xb6b7a2b6]
/lib/i386-linux-gnu/libc.so.6(+0x191c1)[0xb6b7a1c1]
/lib/i386-linux-gnu/libc.so.6(+0x27339)[0xb6b88339]
/usr/lib/i386-linux-gnu/libX11.so.6(+0x39fe4)[0xb6a43fe4]
/usr/lib/i386-linux-gnu/libX11.so.6(+0x3a0e4)[0xb6a440e4]
/usr/lib/i386-linux-gnu/libX11.so.6(_XEventsQueued+0x72)[0xb6a44432]
/usr/lib/i386-linux-gnu/libX11.so.6(XPending+0x62)[0xb6a35ae2]
/usr/lib/i386-linux-gnu/libgdk-x11-2.0.so.0(+0x52208)[0xb7973208]
/usr/lib/i386-linux-gnu/libglib-2.0.so.0(g_main_context_check+0x19a)[0xb6eb6b5a]
/usr/lib/i386-linux-gnu/libglib-2.0.so.0(+0x4b175)[0xb6eb7175]
/usr/lib/i386-linux-gnu/libglib-2.0.so.0(g_main_loop_run+0xe9)[0xb6eb7609]
gimp(app_run+0x37d)[0x491e0d]
gimp(main+0x389)[0x4915e9]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0xb6b7bb41]
gimp(_start+0x31)[0x4917c1]

```
===================================================

It seems to happen quite often.
I've got a few drawings to colorize.
Do you want me too launch gimp a particular way to get more informations?


Regards.
-- 
Stephane