Inkscape (Version 0.91) crashes after 1 to 20 seconds, showing an empty message-dialog, and exits with sigsegv. Crash seems not to be depending on user action, means it happends without reference to user-interaction. This crash happends evere time Inkscape is started!

System: actual ArchLinux (16.2.2015) with Plasma 5.2, qtcurve qtcurve-gtk2 1.8.18-3.

Bugtrace is:

 gdb inkscape
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Reading symbols from inkscape...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/inkscape
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffe8b3d700 (LWP 14998)]
[New Thread 0x7fffe833c700 (LWP 14999)]
[New Thread 0x7fffe7b3b700 (LWP 15000)]
[New Thread 0x7fffe5404700 (LWP 15005)]
[New Thread 0x7fffdffff700 (LWP 15006)]

Program received signal SIGSEGV, Segmentation fault.
0x00007fffe617cd71 in ?? () from /usr/lib/gtk-2.0/2.10.0/engines/libqtcurve.so
(gdb) bt
#0 0x00007fffe617cd71 in ?? () from /usr/lib/gtk-2.0/2.10.0/engines/libqtcurve.so
#1 0x00000000007e06c6 in ?? ()
#2 0x00007ffff69aa89f in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#3 0x00007ffff20ae255 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#4 0x00007ffff20bfe42 in ?? () from /usr/lib/libgobject-2.0.so.0
#5 0x00007ffff20c8265 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#6 0x00007ffff20c89bf in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#7 0x00007ffff6ac199c in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#8 0x00007ffff69a9622 in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#9 0x00007ffff66063df in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#10 0x00007ffff6606385 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#11 0x00007ffff6606385 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#12 0x00007ffff6606385 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#13 0x00007ffff6606385 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#14 0x00007ffff6606385 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#15 0x00007ffff6602cc8 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#16 0x00007ffff6603618 in gdk_window_process_all_updates () from /usr/lib/libgdk-x11-2.0.so.0
#17 0x00007ffff692e9b1 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#18 0x00007ffff65e2517 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#19 0x00007ffff1dd991d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#20 0x00007ffff1dd9cf8 in ?? () from /usr/lib/libglib-2.0.so.0
#21 0x00007ffff1dda022 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#22 0x00007ffff69a83f7 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#23 0x00000000004742bc in ?? ()
#24 0x00007ffff0c96800 in __libc_start_main () from /usr/lib/libc.so.6
#25 0x00000000004708bf in ?? ()
(gdb)

Reproducible: Always

Steps to Reproduce:
1. start Inkscape
2. do whatever you want
3. Inkscape will show an empty dialogwindwo an exit

Actual Results:  
see Details

Expected Results:  
running ;-)

Bug is reportet to inkscape developers too, see https://bugs.launchpad.net/inkscape/+bug/1422479