(4.6b20) Unity crashes when changing a prefab and starting the game.

Unity Engine
1

Has anyone else had this problem? I made a bare minimum project with only one scene and one prefab (besides the canvas), which looks like this:

[EmptyObject]

2

Expirienced same problems with InputField enable and disable in b20
downgrade to b19 or upgrade to b21
we’ve reported this bug

3

Thank you! It seems b21 works fine on the same circumstances.