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Comment # 8 on bug 11400 from jean-christophe manciot

Sorry for the delay, I'm doing this during week-ends only.
So I tried again what you've asked in your last comment and the crash happens
even though the overlay scrollbar is disabled:

--------------------------------------------------
when dumpcap owner & group are username:wireshark:
--------------------------------------------------
ctionmystique@msi-ge60-ubuntu:~$ LIBOVERLAY_SCROLLBAR=0 gdb wireshark
GNU gdb (Ubuntu 7.9-1ubuntu1) 7.9
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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<http://www.gnu.org/software/gdb/bugs/>.
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Reading symbols from wireshark...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/local/bin/wireshark 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffda6a2700 (LWP 22360)]
[New Thread 0x7fffdb307700 (LWP 22359)]
[New Thread 0x7fffe6f80700 (LWP 22306)]

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff138a425 in g_type_check_instance_is_fundamentally_a () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
(gdb) bt full
#0  0x00007ffff138a425 in g_type_check_instance_is_fundamentally_a () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#1  0x00007ffff136beae in g_object_ref () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#2  0x00007ffff108e07d in g_list_foreach () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007ffff253ee01 in gtk_window_set_icon_list () from
/usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#4  0x00000000004416b0 in ?? ()
No symbol table info available.
#5  0x00007ffff13672d5 in g_closure_invoke () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#6  0x00007ffff137903c in ?? () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.                                                 
#7  0x00007ffff1381698 in g_signal_emit_valist () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0                                   
No symbol table info available.                                                 
#8  0x00007ffff13818ff in g_signal_emit () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#9  0x00007ffff252f4ac in gtk_widget_realize () from
/usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#10 0x00007ffff253c388 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#11 0x00007ffff13672d5 in g_closure_invoke () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#12 0x00007ffff1378913 in ?? () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#13 0x00007ffff1381698 in g_signal_emit_valist () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#14 0x00007ffff13818ff in g_signal_emit () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#15 0x00007ffff252b1dc in gtk_widget_show () from
/usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#16 0x00000000004701ae in ?? ()
No symbol table info available.
#17 0x0000000000470650 in ?? ()
No symbol table info available.
#18 0x000000000047072f in ?? ()
No symbol table info available.
#19 0x000000000042862c in ?? ()
No symbol table info available.
#20 0x0000000000427292 in ?? ()
No symbol table info available.
---Type <return> to continue, or q <return> to quit--- 
#21 0x0000000000441815 in ?? ()
No symbol table info available.
#22 0x00007ffff1091b4d in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#23 0x00007ffff1091f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#24 0x00007ffff1092242 in g_main_loop_run () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#25 0x00007ffff23eede5 in gtk_main () from
/usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#26 0x00000000004236b9 in ?? ()
No symbol table info available.
#27 0x00007ffff01eea40 in __libc_start_main (main=0x422510, argc=1,
argv=0x7fffffffde38, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7fffffffde28) at libc-start.c:289
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -7368565585245761331,
4340544, 140737488346672, 0, 0, 7368566257240641741, 
                7368584131169620173}, mask_was_saved = 0}}, priv = {pad = {0x0,
0x0, 0x521da0 <__libc_csu_init>, 0x7fffffffde38}, data = "" = 0x0, 
              cleanup = 0x0, canceltype = 5381536}}}
        not_first_call = <optimized out>
#28 0x0000000000423b69 in _start ()
No symbol table info available.

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