$ gdb gnucash
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1
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Reading symbols from gnucash...(no debugging symbols found)...done.
+(gdb) run
Starting program: /home/simeon/.local/bin/gnucash
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffdec1d700 (LWP 14428)]
[New Thread 0x7fffdd97a700 (LWP 14429)]
[New Thread 0x7fffdd179700 (LWP 14430)]
[New Thread 0x7fffcffff700 (LWP 14431)]
[New Thread 0x7fffceab6700 (LWP 14432)]
[New Thread 0x7fffce2b5700 (LWP 14433)]
[New Thread 0x7fffcdab4700 (LWP 14434)]
Found Finance::Quote version 1.38
[New Thread 0x7fffc7fff700 (LWP 14436)]
[Thread 0x7fffc7fff700 (LWP 14436) exited]

Thread 1 "gnucash" received signal SIGSEGV, Segmentation fault.
0x00007ffff400c6a2 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
+(gdb) backtrace
#0  0x00007ffff400c6a2 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
#1  0x00007ffff403e68e in gdk_x11_window_get_xid ()
   from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
#2  0x00007fffceabaf77 in ?? ()
   from /usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/immodules/im-xim.so
#3  0x00007ffff6cc5833 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#4  0x00007ffff44db84d in gnucash_sheet_key_press_event ()
   from /home/simeon/.local/lib/gnucash/libgncmod-register-gnome.so
#5  0x00007ffff6ce509a in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#6  0x00007ffff6507122 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7  0x00007ffff65214b8 in g_signal_emit_valist ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#8  0x00007ffff652208f in g_signal_emit ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#9  0x00007ffff6e22c3c in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#10 0x00007ffff6e42cbb in gtk_window_propagate_key_event ()
   from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#11 0x00007ffff6e4613b in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#12 0x00007ffff6ce509a in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#13 0x00007ffff65071d4 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#14 0x00007ffff65214b8 in g_signal_emit_valist ()
+---Type <return> to continue, or q <return> to quit---
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#15 0x00007ffff652208f in g_signal_emit ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#16 0x00007ffff6e22c3c in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#17 0x00007ffff6ce24c9 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#18 0x00007ffff6ce41bc in gtk_main_do_event ()
   from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#19 0x00007ffff4029d92 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
#20 0x00007ffff744b197 in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007ffff744b3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007ffff744b712 in g_main_loop_run ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007ffff6ce3395 in gtk_main ()
   from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#24 0x00007ffff6243ee2 in gnc_ui_start_event_loop ()
   from /home/simeon/.local/lib/gnucash/libgncmod-gnome-utils.so
#25 0x0000000000405af8 in inner_main ()
#26 0x00007ffff778bbcd in ?? ()
   from /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#27 0x00007ffff77644fa in ?? ()
   from /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#28 0x00007ffff7801c33 in ?? ()
+---Type <return> to continue, or q <return> to quit---
   from /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#29 0x00007ffff776e1f3 in scm_call_4 ()
   from /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#30 0x00007ffff7764c91 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#31 0x00007ffff7764d75 in scm_c_with_continuation_barrier ()
   from /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#32 0x00007ffff77e4abc in ?? ()
   from /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#33 0x00007ffff23a7c62 in GC_call_with_stack_base ()
   from /usr/lib/x86_64-linux-gnu/libgc.so.1
#34 0x00007ffff77e4ee8 in scm_with_guile ()
   from /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#35 0x00007ffff778bda5 in scm_boot_guile ()
   from /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#36 0x0000000000405fbd in main ()
+(gdb)