Steps to reproduce:
1. Open scene called "scene" in user-supplied project ("Anima2d Testing.zip")
2. Open SpriteMesh Editor window then select Time Dancer -> meshes -> Time_Dancer_1 in the Hierarchy window
3. In the SpriteMesh Editor window press "Unbind"
4. Drag any object from "bones" GameObject in the Hierarchy window into "Bones" tab in the inspector
5. In the SpriteMesh Editor window press "Bind" And "Apply"

Expected: in the Scene/Game View, the Skinned Mesh Renderer on Time_Dancer_1 is visible
Actual: in the Scene/Game View, the Skinned Mesh Renderer on Time_Dancer_1 is invisible and the console throws "Assertion failed: invalid AABB a" error

Reproduced in: 2017.1.3p2, 2017.2.2p1, 2017.3.1p4, 2018.1.0b11, 2018.2.0a4

Note: Tested in OSX 10.11.6 and 10.13