Created attachment 4131 
stracktrace

Hi,

From: https://bugs.launchpad.net/ubuntu/+source/thunar/+bug/852410

"Removed (rm) and re-created (mkdir) a directory on the command line while Thunar was displaying one of its subdirectories. When the directory was removed Thunar switched to displaying the parent directory. When creating it again it showed up as a file of type "(null)", showing its full path as its name. Right-clicking and selecting Properties triggered a crash."

StacktraceTop:
 types_from_mime_type (mime_type=0x0) at thunar-uca-model.c:961
 thunar_uca_model_match (uca_model=0x7f5a8b24b2a0, file_infos=<optimized out>) at thunar-uca-model.c:1058
 thunar_uca_provider_get_file_actions (menu_provider=0x7f5a8b215d00, window=0x7f5a8ae6c170, files=0x7f5a8b3bd6a0) at thunar-uca-provider.c:205
 thunarx_menu_provider_get_file_actions (provider=0x7f5a8b215d00, window=0x7f5a8ae6c170, files=0x7f5a8b3bd6a0) at thunarx-menu-provider.c:97
 thunar_standard_view_merge_custom_actions (selected_items=0x7f5a8b3ba300, standard_view=0x7f5a8b168690) at thunar-standard-view.c:1669