Description of problem:
After multiple connect-drop of remote location cycles, the nautilus crashes. It does not depends on the connection type. I'm really not sure if this bug is not duplicate of bz1168867 or bz1115338, because the backtrace is very similar.

Version-Release number of selected component (if applicable):
nautilus-3.14.3-3.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Connect any remote location (sftp,ftp,davs,smb)
2. Drop the connection
3. Connect again

Actual results:
crash

Expected results:
successful connection, no crash

Additional info:
Backtrace after crash:
ERROR:nautilus-bookmark.c:349:nautilus_bookmark_connect_file: assertion failed: (!nautilus_file_is_gone (bookmark->details->file))

Program received signal SIGABRT, Aborted.
0x00007ffff36415f7 in raise () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install libcroco-0.6.8-5.el7.x86_64 librsvg2-2.39.0-1.el7.x86_64
(gdb) bt
#0  0x00007ffff36415f7 in raise () at /lib64/libc.so.6
#1  0x00007ffff3642ce8 in abort () at /lib64/libc.so.6
#2  0x00007ffff47036d5 in g_assertion_message (domain=domain@entry=0x0, file=file@entry=0x4fb459 "nautilus-bookmark.c", line=line@entry=349, func=func@entry=0x4fbab0 <__FUNCTION__.50519> "nautilus_bookmark_connect_file", message=message@entry=0x103aaa0 "assertion failed: (!nautilus_file_is_gone (bookmark->details->file))") at gtestutils.c:2292
#3  0x00007ffff470376a in g_assertion_message_expr (domain=domain@entry=0x0, file=file@entry=0x4fb459 "nautilus-bookmark.c", line=line@entry=349, func=func@entry=0x4fbab0 <__FUNCTION__.50519> "nautilus_bookmark_connect_file", expr=expr@entry=0x4fb7a0 "!nautilus_file_is_gone (bookmark->details->file)")
    at gtestutils.c:2307
#4  0x0000000000481019 in nautilus_bookmark_connect_file (bookmark=bookmark@entry=0xb7f650 [NautilusBookmark]) at nautilus-bookmark.c:349
#5  0x0000000000481064 in nautilus_bookmark_constructed (obj=<optimized out>)
    at nautilus-bookmark.c:549
#6  0x00007ffff49e1242 in g_object_new_internal (class=class@entry=0xb70ff0, params=params@entry=0x7fffffffd640, n_params=3) at gobject.c:1814
#7  0x00007ffff49e3184 in g_object_new_valist (object_type=object_type@entry=7981888, first_property_name=first_property_name@entry=0x4f77a9 "location", var_args=var_args@entry=0x7fffffffd790) at gobject.c:2034
#8  0x00007ffff49e3581 in g_object_new (object_type=7981888, first_property_name=first_property_name@entry=0x4f77a9 "location") at gobject.c:1617
#9  0x00000000004813e4 in nautilus_bookmark_new (location=location@entry=0xb75490, custom_name=custom_name@entry=0xd15980 "") at nautilus-bookmark.c:756
#10 0x0000000000471c1d in view_begin_loading_cb (file=0xe2bd50 [NautilusVFSFile], slot=0xc92800 [NautilusWindowSlot]) at nautilus-window-slot.c:1848
#11 0x0000000000471c1d in view_begin_loading_cb (slot=0xc92800 [NautilusWindowSlot]) at nautilus-window-slot.c:2131
#12 0x0000000000471c1d in view_begin_loading_cb (slot=0xc92800 [NautilusWindowSlot]) at nautilus-window-slot.c:2409
#13 0x0000000000471c1d in view_begin_loading_cb (view=<optimized out>, slot=0xc92800 [NautilusWindowSlot]) at nautilus-window-slot.c:2264
#17 0x00007ffff49f572f in <emit signal ??? on instance 0xb96830 [NautilusCanvasView]> (instance=instance@entry=0xb96830, signal_id=<optimized out>, detail=detail@entry=0) at gsignal.c:3365
    #14 0x00007ffff49dbde8 in g_closure_invoke (closure=0xb20890, return_value=return_value@entry=0x0, n_param_values=1, param_values=param_values@entry=0x7fffffffda90, invocation_hint=invocation_hint@entry=0x7fffffffda30)
    at gclosure.c:768
    #15 0x00007ffff49ed70d in signal_emit_unlocked_R (node=node@entry=0xb88810, detail=detail@entry=0, instance=instance@entry=0xb96830, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffffffda90) at gsignal.c:3553
    #16 0x00007ffff49f5471 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fffffffdc10) at gsignal.c:3309
#18 0x0000000000460bfb in finish_loading_if_all_metadata_loaded (view=0xb96830 [NautilusCanvasView]) at nautilus-view.c:9160
#19 0x0000000000460bfb in finish_loading_if_all_metadata_loaded (view=view@entry=0xb96830 [NautilusCanvasView]) at nautilus-view.c:9219
#20 0x0000000000460e13 in metadata_for_files_in_directory_ready_callback (directory=0xb761c0 [NautilusVFSDirectory], files=<optimized out>, callback_data=0xb96830) at nautilus-view.c:9260
#21 0x000000000049d702 in ready_callback_call (directory=0xb761c0 [NautilusVFSDirectory], callback=<optimized out>) at nautilus-directory-async.c:1261
#22 0x00000000004a25f3 in call_ready_callbacks_at_idle (callback_data=<optimized out>) at nautilus-directory-async.c:1798
#23 0x00007ffff46de79a in g_main_context_dispatch (context=0x792200)
    at gmain.c:3109
#24 0x00007ffff46de79a in g_main_context_dispatch (context=context@entry=0x792200) at gmain.c:3708
#25 0x00007ffff46deae8 in g_main_context_iterate (context=context@entry=0x792200, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at gmain.c:3779
#26 0x00007ffff46deb9c in g_main_context_iteration (context=0x792200, 
    context@entry=0x0, may_block=may_block@entry=1) at gmain.c:3840
#27 0x00007ffff4cc1f24 in g_application_run (application=0x76a120 [NautilusApplication], argc=argc@entry=1, argv=argv@entry=0x7fffffffdfe8)
    at gapplication.c:2282
#28 0x000000000042a0fb in main (argc=1, argv=0x7fffffffdfe8)
    at nautilus-main.c:103