khumba@sakara ~ $ gdb /usr/bin/awesome core
GNU gdb 6.8
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu"...

warning: Can't read pathname for load map: Input/output error.
Reading symbols from /usr/lib64/libxcb.so.1...done.
Loaded symbols for /usr/lib/libxcb.so.1
Reading symbols from /usr/lib64/libX11.so.6...done.
Loaded symbols for /usr/lib/libX11.so.6
Reading symbols from /usr/lib64/libpangocairo-1.0.so.0...done.
Loaded symbols for /usr/lib/libpangocairo-1.0.so.0
Reading symbols from /usr/lib64/libpango-1.0.so.0...done.
Loaded symbols for /usr/lib/libpango-1.0.so.0
Reading symbols from /usr/lib64/libgobject-2.0.so.0...done.
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Reading symbols from /usr/lib64/libgmodule-2.0.so.0...done.
Loaded symbols for /usr/lib/libgmodule-2.0.so.0
Reading symbols from /usr/lib64/libglib-2.0.so.0...done.
Loaded symbols for /usr/lib/libglib-2.0.so.0
Reading symbols from /usr/lib64/libxcb-randr.so.0...done.
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Reading symbols from /usr/lib64/libxcb-xtest.so.0...done.
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Reading symbols from /usr/lib64/libxcb-xinerama.so.0...done.
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Reading symbols from /usr/lib64/libxcb-aux.so.0...done.
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Reading symbols from /usr/lib64/libxcb-keysyms.so.0...done.
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Reading symbols from /usr/lib64/libxcb-icccm.so.1...done.
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Reading symbols from /usr/lib64/libxcb-atom.so.1...done.
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Reading symbols from /usr/lib64/libxcb-image.so.0...done.
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Reading symbols from /usr/lib64/libxcb-shm.so.0...done.
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Reading symbols from /usr/lib64/libxcb-property.so.1...done.
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Reading symbols from /usr/lib64/libxcb-event.so.1...done.
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Reading symbols from /usr/lib64/libcairo.so.2...done.
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Reading symbols from /usr/lib64/libxcb-render-util.so.0...done.
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Reading symbols from /usr/lib64/libxcb-render.so.0...done.
Loaded symbols for /usr/lib/libxcb-render.so.0
Reading symbols from /usr/lib64/libImlib2.so.1...done.
Loaded symbols for /usr/lib/libImlib2.so.1
Reading symbols from /usr/lib64/libev.so.3...done.
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Reading symbols from /usr/lib64/liblua.so.5...done.
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Reading symbols from /lib64/libm.so.6...done.
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Reading symbols from /usr/lib64/libdbus-1.so.3...done.
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Reading symbols from /lib64/libc.so.6...done.
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Reading symbols from /usr/lib64/libXau.so.6...done.
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Reading symbols from /usr/lib64/libXdmcp.so.6...done.
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Reading symbols from /usr/lib64/libxcb-xlib.so.0...done.
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Reading symbols from /lib64/libdl.so.2...done.
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Reading symbols from /usr/lib64/libpixman-1.so.0...done.
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Reading symbols from /usr/lib64/libpng12.so.0...done.
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Reading symbols from /usr/lib64/libXrender.so.1...done.
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Reading symbols from /lib64/libpthread.so.0...done.
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Reading symbols from /lib64/libnss_compat.so.2...done.
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Reading symbols from /lib64/libnsl.so.1...done.
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Reading symbols from /lib64/libnss_nis.so.2...done.
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Reading symbols from /lib64/libnss_files.so.2...done.
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Reading symbols from /usr/lib64/pango/1.6.0/modules/pango-basic-fc.so...done.
Loaded symbols for /usr/lib64/pango/1.6.0/modules/pango-basic-fc.so
Reading symbols from /usr/lib64/imlib2/loaders/zlib.so...done.
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Reading symbols from /usr/lib64/imlib2/loaders/xpm.so...done.
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Reading symbols from /usr/lib64/imlib2/loaders/tiff.so...done.
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Reading symbols from /usr/lib64/libtiff.so.3...done.
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Reading symbols from /usr/lib64/libjpeg.so.62...done.
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Reading symbols from /usr/lib64/imlib2/loaders/tga.so...done.
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Reading symbols from /usr/lib64/imlib2/loaders/pnm.so...done.
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Reading symbols from /usr/lib64/imlib2/loaders/png.so...done.
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Reading symbols from /usr/lib64/imlib2/loaders/lbm.so...done.
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Reading symbols from /usr/lib64/imlib2/loaders/jpeg.so...done.
Loaded symbols for /usr/lib64/imlib2/loaders/jpeg.so
Reading symbols from /usr/lib64/imlib2/loaders/id3.so...done.
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Reading symbols from /usr/lib64/libid3tag.so.0...done.
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Reading symbols from /usr/lib64/imlib2/loaders/gif.so...done.
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Reading symbols from /usr/lib64/libgif.so.4...done.
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Reading symbols from /usr/lib64/libSM.so.6...done.
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Reading symbols from /usr/lib64/libICE.so.6...done.
Loaded symbols for /usr/lib/libICE.so.6
Reading symbols from /lib64/libuuid.so.1...done.
Loaded symbols for /lib/libuuid.so.1
Reading symbols from /usr/lib64/imlib2/loaders/bz2.so...done.
Loaded symbols for /usr/lib64/imlib2/loaders/bz2.so
Reading symbols from /lib64/libbz2.so.1...done.
Loaded symbols for /lib/libbz2.so.1
Reading symbols from /usr/lib64/imlib2/loaders/bmp.so...done.
Loaded symbols for /usr/lib64/imlib2/loaders/bmp.so
Reading symbols from /usr/lib64/imlib2/loaders/argb.so...done.
Loaded symbols for /usr/lib64/imlib2/loaders/argb.so
Core was generated by `/usr/bin/awesome'.
Program terminated with signal 11, Segmentation fault.
[New process 17430]
#0  0x00007f0214e075a0 in pango_parse_markup (markup_text=0x0, length=57, accel_marker=<value optimized out>, attr_list=0x254bb00, text=0x254bb08, accel_char=0x0,
    error=0x7fff1d978a68) at pango-markup.c:626
626     pango-markup.c: No such file or directory.
        in pango-markup.c
(gdb) bt
#0  0x00007f0214e075a0 in pango_parse_markup (markup_text=0x0, length=57, accel_marker=<value optimized out>, attr_list=0x254bb00, text=0x254bb08, accel_char=0x0,
    error=0x7fff1d978a68) at pango-markup.c:626
#1  0x000000000042e381 in draw_text_context_init (data=0x254bb00, str=0x0, slen=0) at /var/tmp/portage/x11-wm/awesome-3.2.1-r3/work/awesome-3.2.1/draw.c:172
#2  0x0000000000434fea in luaA_textbox_newindex (L=0x242a030, token=<value optimized out>) at /var/tmp/portage/x11-wm/awesome-3.2.1-r3/work/awesome-3.2.1/widgets/textbox.c:311
#3  0x000000000042bbf8 in luaA_widget_newindex (L=0x242a030) at /var/tmp/portage/x11-wm/awesome-3.2.1-r3/work/awesome-3.2.1/widget.c:497
#4  0x00007f021236c196 in luaD_precall (L=0x242a030, func=0x2531f70, nresults=0) at ldo.c:319
#5  0x00007f021236c6a9 in luaD_call (L=0x242a030, func=0x2531f70, nResults=0) at ldo.c:376
#6  0x00007f0212376a5c in luaV_execute (L=0x242a030, nexeccalls=5) at lvm.c:454
#7  0x00007f021236c705 in luaD_call (L=0x242a030, func=0x2531cc0, nResults=0) at ldo.c:377
#8  0x00007f021236bd87 in luaD_rawrunprotected (L=0x242a030, f=0x7f0212367870 <f_call>, ud=0x7fff1d978e20) at ldo.c:116
#9  0x00007f021236be05 in luaD_pcall (L=0x0, func=0, u=0x39, old_top=39219152, ef=4) at ldo.c:463
#10 0x00007f02123676b4 in lua_pcall (L=0x242a030, nargs=2, nresults=0, errfunc=<value optimized out>) at lapi.c:821
#11 0x0000000000419dbd in property_handle_wm_name (data=<value optimized out>, connection=<value optimized out>, state=<value optimized out>, window=<value optimized out>,
    name=<value optimized out>, reply=<value optimized out>) at /var/tmp/portage/x11-wm/awesome-3.2.1-r3/work/awesome-3.2.1/luaa.h:314
#12 0x00007f021328dd09 in ?? () from /usr/lib/libxcb-property.so.1
#13 0x000000000040df9d in a_xcb_check_cb (loop=<value optimized out>, w=<value optimized out>, revents=<value optimized out>)
    at /var/tmp/portage/x11-wm/awesome-3.2.1-r3/work/awesome-3.2.1/awesome.c:209
#14 0x00007f0212592e0f in ev_loop () from /usr/lib/libev.so.3
#15 0x000000000040ed09 in main (argc=1, argv=0x7fff1d979218) at /var/tmp/portage/x11-wm/awesome-3.2.1-r3/work/awesome-3.2.1/awesome.c:549
(gdb) i lo
context = (GMarkupParseContext *) 0x2566f30
needs_root = <value optimized out>
tmp_list = <value optimized out>
p = 0x0
end = 0x39 <Address 0x39 out of bounds>
(gdb)