gdb -arg nautilus
GNU gdb 6.3
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This GDB was configured as "i686-pc-linux-gnu"...Using host libthread_db library "/lib/libthread_db.so.1".

(gdb) run
Starting program: /usr/bin/nautilus
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 3380)]
[New Thread 32769 (LWP 3383)]
[New Thread 16386 (LWP 3384)]
[New Thread 32771 (LWP 3387)]
[New Thread 49156 (LWP 3388)]
[New Thread 65541 (LWP 3389)]
[New Thread 81926 (LWP 3390)]
[New Thread 98311 (LWP 3391)]
(nil) : Freed()
xmlMallocBreakpoint reached on block 0

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 3380)]
0xb71c286c in xmlMemFree () from /usr/lib/libxml2.so.2
(gdb) bt
#0  0xb71c286c in xmlMemFree () from /usr/lib/libxml2.so.2
#1  0xb7ef201d in get_metadata_from_node (node=0x0, key=0x0,
    default_metadata=0x0) at nautilus-metafile.c:703
#2  0xb7ef2251 in get_metadata_string_from_metafile (metafile=0x0,
    file_name=0x0, key=0x27 <Address 0x27 out of bounds>,
    default_metadata=0x27 <Address 0x27 out of bounds>)
    at nautilus-metafile.c:770
#3  0xb7ef2f81 in get_file_metadata (metafile=0x82e3fe0,
    file_name=0x82d7020 "patrick", key=0xb7f1593f "custom_icon",
    default_metadata=0xb7f128a5 "") at nautilus-metafile.c:1176
#4  0xb7ef192f in corba_get (servant=0x82e3ff4,
    file_name=0x27 <Address 0x27 out of bounds>,
    key=0x27 <Address 0x27 out of bounds>,
    default_value=0x27 <Address 0x27 out of bounds>, ev=0xbff9af30)
    at nautilus-metafile.c:367
#5  0xb7ea707d in _ORBIT_skel_small_Nautilus_Metafile_get (_o_servant=0x0,
    _o_retval=0x27, _o_args=0x27, _o_ctx=0x0, _o_ev=0x0,
    _impl_get=0xb7ef18e1 <corba_get>) at nautilus-metafile-server-common.c:28
#6  0xb71236b3 in ORBit_c_stub_invoke () from /usr/lib/libORBit-2.so.0
#7  0xb7ea5fde in Nautilus_Metafile_get (_obj=0x0,
    file_name=0x82d7020 "patrick", key=0xb7f1593f "custom_icon",
    default_value=0xb7f128a5 "", ev=0x0) at nautilus-metafile-server-stubs.c:34
#8  0xb7eb8c3b in nautilus_directory_get_file_metadata (directory=0x82e3b60,
---Type <return> to continue, or q <return> to quit---
    file_name=0x82d7020 "patrick", key=0xb7f1593f "custom_icon",
    default_metadata=0x0) at nautilus-directory-metafile.c:204
#9  0xb7ecdaae in nautilus_file_get_metadata (file=0x82e3d80,
    key=0xb7f1593f "custom_icon", default_metadata=0x0) at nautilus-file.c:2510
#10 0xb7ecea0b in nautilus_file_get_custom_icon (file=0x82e3d80)
    at nautilus-file.c:2867
#11 0xb7eec509 in nautilus_icon_factory_get_icon_for_file (file=0x82e3d80,
    embedd_text=0) at nautilus-icon-factory.c:825
#12 0xb7ea8952 in nautilus_bookmark_update_icon (bookmark=0x8328d90)
    at nautilus-bookmark.c:311
#13 0xb7ea8e55 in nautilus_bookmark_connect_file (bookmark=0x8328d90)
    at nautilus-bookmark.c:454
#14 0xb7ea8f16 in nautilus_bookmark_new_with_icon (uri=0x0, name=0x0, icon=0x0)
    at nautilus-bookmark.c:476
#15 0xb7ea8c26 in nautilus_bookmark_new (uri=0x0, name=0x0)
    at nautilus-bookmark.c:412
#16 0x0808808d in set_displayed_location (window=0x81bd160,
    location=0x82d6f88 "file:///home/patrick")
    at nautilus-window-manage-views.c:136
#17 0x08089c76 in load_new_location (window=0x81bd160,
    location=0x82d6f88 "file:///home/patrick", selection=0x0,
    tell_current_content_view=0, tell_new_content_view=1)
    at nautilus-window-manage-views.c:1037
---Type <return> to continue, or q <return> to quit---
#18 0x08089b3e in create_content_view (window=0x81bd160,
    view_id=0x83096a0 "OAFIID:Nautilus_File_Manager_List_View")
    at nautilus-window-manage-views.c:1000
#19 0x08089815 in got_file_info_for_view_selection_callback (file=0x82e3d80,
    callback_data=0x81bd160) at nautilus-window-manage-views.c:889
#20 0xb7eb2dce in ready_callback_call (directory=0x82e3b60, callback=0x82ea140)
    at nautilus-directory-async.c:1262
#21 0xb7eb3e29 in call_ready_callbacks (directory=0x82e3b60)
    at nautilus-directory-async.c:1895
#22 0xb7eb68b8 in nautilus_directory_async_state_changed (directory=0x82e3b60)
    at nautilus-directory-async.c:3395
#23 0xb7eee108 in execute_queued_functions (callback_data=0x81c0cb0)
    at nautilus-idle-queue.c:66
#24 0xb6ff36a1 in g_child_watch_add () from /usr/lib/libglib-2.0.so.0
#25 0xb6fee994 in g_source_remove_poll () from /usr/lib/libglib-2.0.so.0
#26 0xb6ff12b0 in g_main_context_acquire () from /usr/lib/libglib-2.0.so.0
#27 0xb6ff163a in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#28 0xb78af873 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#29 0x08078a42 in main (argc=39, argv=0xbff9b554) at nautilus-main.c:432
(gdb) quit
The program is running.  Exit anyway? (y or n) y