System Information
win 10 64bit gtx970
Blender Version
Broken: (example: 2.69.7 4b206af, see splash screen)
Worked: official 2.77 ede7429
Short description of error
snap on face in object mode makes blender freeze.
Exact steps for others to reproduce the error
press G to grab and move the selected object to get Blender totally stuck.