Comment 13 for bug 1285287

Stack trace:
(gdb) bt
#0 0x00007fa5e939e7a0 in g_str_hash () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1 0x00007fa5e939d8bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fa5e565c1d8 in gtk_icon_theme_list_contexts ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#3 0x00007fa5e5d8ba25 in XS_Gtk2__IconTheme_list_contexts ()
   from /usr/lib/perl5/auto/Gtk2/Gtk2.so
#4 0x00007fa5eb1ad83f in Perl_pp_entersub () from /usr/lib/libperl.so.5.14
#5 0x00007fa5eb1a4cd6 in Perl_runops_standard () from /usr/lib/libperl.so.5.14
#6 0x00007fa5eb1405fe in Perl_call_sv () from /usr/lib/libperl.so.5.14
#7 0x00007fa5e9ad5020 in ?? () from /usr/lib/perl5/auto/Glib/Glib.so
#8 0x00007fa5e986cca2 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#9 0x00007fa5e9886ac1 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#10 0x00007fa5e93add13 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fa5e93ae060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007fa5e93ae45a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007fa5e5688397 in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#14 0x00007fa5e5c6f809 in XS_Gtk2_main () from /usr/lib/perl5/auto/Gtk2/Gtk2.so
#15 0x00007fa5eb1ad83f in Perl_pp_entersub () from /usr/lib/libperl.so.5.14
#16 0x00007fa5eb1a4cd6 in Perl_runops_standard () from /usr/lib/libperl.so.5.14
#17 0x00007fa5eb1405fe in Perl_call_sv () from /usr/lib/libperl.so.5.14