Description of problem:
Opened x2 Thunar windows, one of them to a local folder another to an smb shared folder.
Tried drag and dropping a folder with sub folders and files into the smb share from local machine when it crashed (specifically trying to copy Downloads folder /home/user/Downloads)
Also tried right click copy and right click paste and this did not work (crashed)
Created the folder from Thunar on the SMB share and selected all items in the folder I was trying to copy up and that crashed when trying to paste.

In the end I just manually created the folder and selectively copied some individual files and folders

Version-Release number of selected component:
Thunar-1.6.4-1.fc20

Additional info:
reporter:       libreport-2.2.3
backtrace_rating: 4
cmdline:        /usr/bin/Thunar --daemon
crash_function: g_mount_spec_get
executable:     /usr/bin/thunar
kernel:         3.18.6-100.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1409

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 g_mount_spec_get at gmountspec.c:390
 #1 g_mount_spec_get_type at gmountspec.c:404
 #2 _g_daemon_vfs_get_mount_spec_for_path at gdaemonvfs.c:444
 #3 new_file_for_new_path at gdaemonfile.c:231
 #4 g_daemon_file_get_parent at gdaemonfile.c:266
 #5 thunar_transfer_job_veryify_destination at thunar-transfer-job.c:703
 #6 thunar_transfer_job_execute at thunar-transfer-job.c:957
 #7 exo_job_scheduler_job_func at exo-job.c:317
 #8 io_job_thread at gioscheduler.c:89
 #9 g_task_thread_pool_thread at gtask.c:1245