(gdb) bt
#0  0x00007f432c8c5205 in raise () from /lib/libc.so.6
#1  0x00007f432c8c6723 in abort () from /lib/libc.so.6
#2  0x00007f432c900cf8 in ?? () from /lib/libc.so.6
#3  0x00007f432c906468 in ?? () from /lib/libc.so.6
#4  0x00007f432c907fa6 in free () from /lib/libc.so.6
#5  0x00007f432e6a333d in pango_font_description_free () from /usr/lib/libpango-1.0.so.0
#6  0x00007f43255f0a83 in ?? () from /usr/lib64/gkrellm2/plugins/gkrellsun.so
#7  0x00007f43255f4dcb in ?? () from /usr/lib64/gkrellm2/plugins/gkrellsun.so
#8  0x000000000041b0af in gkrellm_build () at main.c:1897
#9  0x0000000000472b74 in enable_plugin (plugin=0x7f432582a4c0) at plugins.c:1039
#10 0x00000000004743f8 in cb_enable_plugin (cell=0x193d0c0, path_str=0x16d9d00 "1", data=0x16c22b0) at plugins.c:1623
#11 0x00007f432df8e10d in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#12 0x00007f432dfa168a in ?? () from /usr/lib/libgobject-2.0.so.0
#13 0x00007f432dfa2a4f in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#14 0x00007f432dfa2f23 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#15 0x00007f432f98270b in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#16 0x00007f432fb0edb6 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#17 0x00007f432fb0f2fb in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#18 0x00007f432fb0c2f3 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#19 0x00007f432fa19768 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#20 0x00007f432df8e10d in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#21 0x00007f432dfa1356 in ?? () from /usr/lib/libgobject-2.0.so.0
#22 0x00007f432dfa28e5 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#23 0x00007f432dfa2f23 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#24 0x00007f432fb1bd46 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#25 0x00007f432fa1242b in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0
#26 0x00007f432fa1352b in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#27 0x00007f432f69284c in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#28 0x00007f432d6c56a0 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#29 0x00007f432d6c8d38 in ?? () from /usr/lib/libglib-2.0.so.0
#30 0x00007f432d6c9225 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#31 0x00007f432fa13927 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#32 0x000000000041c29f in main (argc=1, argv=0x7fffea0b9e78) at main.c:2278