Reading symbols from /usr/pkg/bin/zathura...(no debugging symbols found)...done.
[New process 1]
[New process 5]
[New process 4]
[New process 3]
[New process 2]
Core was generated by `zathura'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000716e254a8eac in fz_is_external_link ()
   from /usr/pkg/lib/libmupdf.so.0
[Current thread is 1 (LWP 1)]
#0  0x0000716e254a8eac in fz_is_external_link ()
   from /usr/pkg/lib/libmupdf.so.0
#1  0x0000716e28003836 in build_index () from /usr/pkg/lib/zathura/pdf.so
#2  0x0000716e28003927 in pdf_document_index_generate ()
   from /usr/pkg/lib/zathura/pdf.so
#3  0x00000000004263bc in sc_toggle_index ()
#4  0x0000716e35409bed in girara_callback_view_key_press_event ()
   from /usr/pkg/lib/libgirara-gtk3.so.2
#5  0x0000716e34c2236c in _gtk_marshal_BOOLEAN__BOXED ()
   from /usr/pkg/lib/libgtk-3.so.0
#6  0x0000716e3260edf5 in g_closure_invoke ()
   from /usr/pkg/lib/libgobject-2.0.so.0
#7  0x0000716e32620616 in signal_emit_unlocked_R ()
   from /usr/pkg/lib/libgobject-2.0.so.0
#8  0x0000716e32628c79 in g_signal_emit_valist ()
   from /usr/pkg/lib/libgobject-2.0.so.0
#9  0x0000716e3262950a in g_signal_emit ()
   from /usr/pkg/lib/libgobject-2.0.so.0
#10 0x0000716e34d663a4 in gtk_widget_event_internal ()
   from /usr/pkg/lib/libgtk-3.so.0
#11 0x0000716e34d8615b in gtk_window_propagate_key_event ()
   from /usr/pkg/lib/libgtk-3.so.0
#12 0x0000716e34d89beb in gtk_window_key_press_event ()
   from /usr/pkg/lib/libgtk-3.so.0
#13 0x0000716e34c22447 in _gtk_marshal_BOOLEAN__BOXEDv ()
   from /usr/pkg/lib/libgtk-3.so.0
#14 0x0000716e3260f024 in _g_closure_invoke_va ()
   from /usr/pkg/lib/libgobject-2.0.so.0
#15 0x0000716e3262891e in g_signal_emit_valist ()
   from /usr/pkg/lib/libgobject-2.0.so.0
#16 0x0000716e3262950a in g_signal_emit ()
   from /usr/pkg/lib/libgobject-2.0.so.0
#17 0x0000716e34d663a4 in gtk_widget_event_internal ()
   from /usr/pkg/lib/libgtk-3.so.0
#18 0x0000716e34c1f549 in propagate_event () from /usr/pkg/lib/libgtk-3.so.0
#19 0x0000716e34c214ab in gtk_main_do_event () from /usr/pkg/lib/libgtk-3.so.0
#20 0x0000716e3462d0b5 in _gdk_event_emit () from /usr/pkg/lib/libgdk-3.so.0
#21 0x0000716e3465ce62 in gdk_event_source_dispatch ()
   from /usr/pkg/lib/libgdk-3.so.0
#22 0x0000716e322478d7 in g_main_context_dispatch ()
   from /usr/pkg/lib/libglib-2.0.so.0
#23 0x0000716e32247b08 in g_main_context_iterate.isra ()
   from /usr/pkg/lib/libglib-2.0.so.0
#24 0x0000716e32247e22 in g_main_loop_run () from /usr/pkg/lib/libglib-2.0.so.0
#25 0x0000716e34c206f5 in gtk_main () from /usr/pkg/lib/libgtk-3.so.0
#26 0x000000000042b147 in main ()
(gdb) quit