5.4.0B14/5.4.0B13/5.4.0B10 Crash with skinned meshes in build

Hi there,
we have just tried out the new Unity5 5.4.0B14 build today.
Everything works fine in editor, but after building our game, the build crashes.

We think that we have nailed it down to skinned meshes. Whenever there is a skinned mesh in the scene, the build just crashes.
Playing the game in editor works just fine.

Here is the message that we get on crash:

We have not tried earlier versions yet. We have just switched to 5.4 today. We are going to revert "back" to b13
tomorrow. It is to late in the night now to test it

Will post again once I know more. Thank you!

 

Alright, we tested it on Beta 13 today, and it also crashes. Exactly the same thing.

 

Beta 10 has the same problem.

 

@Olafson Bug report # please?

 

Sorry, I forgot.
I have submitted one now. Thank you.

 

Could you share the number here?

 

(Case 789907)