Steps to reproduce:
1. Open the newest attached project "Layers.zip"
2. Go to Window/Generate Animation Controller and save it
3. View the newly created animator controller in the Animator window

Expected Behaviour: all layers have regular default states and stateMachines
Actual Behaviour: last layer is completely empty and nothing can be properly done with it

Reproduced on: 5.3.7p2, 5.4.4p1, 5.5.0p1, 5.5.1f1. 5.6.0b5

Notes:
-unable to get or set stateMachine because default one does not exist(NullRefference error)
-can still set the name, defaultWeight and other parameters