~/COR> LC_ALL=C gdb pcmanfm core.pcman
GNU gdb (GDB) 7.8
Copyright (C) 2014 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-unknown-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from pcmanfm...Reading symbols from /usr/lib/debug//usr/bin/pcmanfm.debug...done.
done.
[New LWP 1450]
[New LWP 1453]
[New LWP 1452]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `pcmanfm --desktop --profile LXDE'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  fm_mime_type_ref (mime_type=mime_type@entry=0x0) at base/fm-mime-type.c:326
326	base/fm-mime-type.c: No such file or directory.
(gdb) bt
#0  fm_mime_type_ref (mime_type=mime_type@entry=0x0) at base/fm-mime-type.c:326
#1  0x00007f71b6b664c4 in _fm_template_guess_mime_type (path=0x22c5710, mime_type=0x0, tpath=tpath@entry=0x7fff08f2c8a0)
    at base/fm-templates.c:160
#2  0x00007f71b6b66ae0 in _fm_template_find_for_file (path=path@entry=0x22c5710, mime_type=mime_type@entry=0x0)
    at base/fm-templates.c:291
#3  0x00007f71b6b670ff in on_dir_changed (mon=<optimized out>, gf=<optimized out>, other=<optimized out>,
    evt=G_FILE_MONITOR_EVENT_CREATED, dir=0x7f71a40094f0) at base/fm-templates.c:657
#4  0x00007f71b1f28df0 in ffi_call_unix64 () from /usr/lib/libffi.so.6
#5  0x00007f71b1f28861 in ffi_call () from /usr/lib/libffi.so.6
#6  0x00007f71b658fecc in g_cclosure_marshal_generic_va () from /usr/lib/libgobject-2.0.so.0
#7  0x00007f71b658f484 in ?? () from /usr/lib/libgobject-2.0.so.0
#8  0x00007f71b65a9077 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#9  0x00007f71b65a99cf in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#10 0x00007f71b6825191 in ?? () from /usr/lib/libgio-2.0.so.0
#11 0x00007f71b62ba92d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#12 0x00007f71b62bad08 in ?? () from /usr/lib/libglib-2.0.so.0
#13 0x00007f71b62bb032 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#14 0x00007f71b7d3c3f7 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#15 0x000000000041205d in main (argc=1, argv=0x7fff08f2d1e8) at pcmanfm.c:284
(gdb)