(gdb) run
Starting program: /usr/bin/nautilus 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffea558700 (LWP 2387)]
[New Thread 0x7fffe9d57700 (LWP 2388)]
[New Thread 0x7fffe9556700 (LWP 2389)]
[New Thread 0x7fffe8d55700 (LWP 2390)]
Initializing nautilus-open-terminal extension
[Thread 0x7fffe8d55700 (LWP 2390) exited]
[New Thread 0x7fffe8d55700 (LWP 2394)]
[New Thread 0x7fffc8fd7700 (LWP 2395)]
[New Thread 0x7fffc3fff700 (LWP 2396)]
[New Thread 0x7fffc37fe700 (LWP 2397)]
[New Thread 0x7fffc2ffd700 (LWP 2398)]
[New Thread 0x7fffc27fc700 (LWP 2399)]
[New Thread 0x7fffc1ffb700 (LWP 2400)]
[New Thread 0x7fffc17fa700 (LWP 2401)]
[New Thread 0x7fffc0ff9700 (LWP 2402)]
[Thread 0x7fffe8d55700 (LWP 2394) exited]
[Thread 0x7fffc1ffb700 (LWP 2400) exited]
[Thread 0x7fffc8fd7700 (LWP 2395) exited]
[Thread 0x7fffc27fc700 (LWP 2399) exited]
[Thread 0x7fffc3fff700 (LWP 2396) exited]
[Thread 0x7fffc0ff9700 (LWP 2402) exited]
[Thread 0x7fffc17fa700 (LWP 2401) exited]
[Thread 0x7fffe9556700 (LWP 2389) exited]
[Thread 0x7fffc37fe700 (LWP 2397) exited]
**
ERROR:nautilus-bookmarks-window.c:272:repopulate: assertion failed: (GTK_IS_TREE_VIEW (bookmark_list_widget))

Program received signal SIGABRT, Aborted.
0x00007ffff39e7445 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64	../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x00007ffff39e7445 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x00007ffff39eabab in __GI_abort () at abort.c:91
#2  0x00007ffff47282e7 in g_assertion_message (domain=domain@entry=0x0, 
    file=file@entry=0x4f61a1 "nautilus-bookmarks-window.c", line=line@entry=272, 
    func=func@entry=0x4f64b9 "repopulate", message=<optimized out>)
    at /build/buildd/glib2.0-2.33.6/./glib/gtestutils.c:1861
#3  0x00007ffff4728804 in g_assertion_message_expr (domain=domain@entry=0x0, 
    file=file@entry=0x4f61a1 "nautilus-bookmarks-window.c", line=line@entry=272, 
    func=func@entry=0x4f64b9 "repopulate", expr=expr@entry=0x4f60b8 "GTK_IS_TREE_VIEW (bookmark_list_widget)")
    at /build/buildd/glib2.0-2.33.6/./glib/gtestutils.c:1872
#4  0x000000000042f8a7 in repopulate () at nautilus-bookmarks-window.c:272
#5  0x00007ffff49c5050 in g_closure_invoke (closure=0xf9ff80, return_value=0x0, n_param_values=1, 
    param_values=0x7fffffffdca0, invocation_hint=0x7fffffffdc40)
    at /build/buildd/glib2.0-2.33.6/./gobject/gclosure.c:777
#6  0x00007ffff49d6d30 in signal_emit_unlocked_R (node=node@entry=0x7939b0, detail=detail@entry=0, 
    instance=instance@entry=0x910860, emission_return=emission_return@entry=0x0, 
    instance_and_params=instance_and_params@entry=0x7fffffffdca0)
    at /build/buildd/glib2.0-2.33.6/./gobject/gsignal.c:3551
#7  0x00007ffff49defb1 in g_signal_emit_valist (instance=0x910860, signal_id=<optimized out>, detail=0, 
    var_args=var_args@entry=0x7fffffffdee8) at /build/buildd/glib2.0-2.33.6/./gobject/gsignal.c:3300
#8  0x00007ffff49df202 in g_signal_emit (instance=instance@entry=0x910860, signal_id=<optimized out>, 
    detail=detail@entry=0) at /build/buildd/glib2.0-2.33.6/./gobject/gsignal.c:3356
#9  0x000000000042e472 in load_callback (source=<optimized out>, res=<optimized out>, user_data=<optimized out>)