Description of problem:
Tried attaching a file to an email.  When I hit "/" in the file browser, it crashed.

Version-Release number of selected component:
evolution-3.12.5-1.fc21

Additional info:
reporter:       libreport-2.2.3
backtrace_rating: 4
cmdline:        evolution
crash_function: _gtk_rbtree_find_offset
executable:     /usr/bin/evolution
kernel:         3.16.1-300.fc21.x86_64
runlevel:       N 5
type:           CCpp
uid:            1975

Truncated backtrace:
Thread no. 1 (10 frames)
 #4 _gtk_rbtree_find_offset at gtkrbtree.c:1044
 #5 gtk_tree_view_drag_gesture_begin at gtktreeview.c:3327
 #6 ffi_call_unix64 at ../src/x86/unix64.S:76
 #7 ffi_call at ../src/x86/ffi64.c:525
 #8 g_cclosure_marshal_generic_va at gclosure.c:1541
 #9 _g_closure_invoke_va at gclosure.c:831
 #12 g_cclosure_marshal_VOID__BOXEDv at gmarshal.c:1160
 #13 _g_closure_invoke_va at gclosure.c:831
 #16 _gtk_gesture_set_recognized at gtkgesture.c:273
 #17 _gtk_gesture_check_recognized at gtkgesture.c:318