Small meshes cause editor to freeze on entering playmode

Unity Engine
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1

Hi!

I’ve run into quite an annoying bug. If I have a mesh physics shape authoring with a mesh assigned that is too small, it freezes the editor when entering playmode. It also happens if you’d use the standard sphere mesh as the assigned mesh for the physics shape and turn the scale down to at least about 0.1.

If you try to enter playmode after doing this it freezes the editor for me. I have also reported this bug but I am not sure if the bug report feature is useful for preview packages like this. And I wanted to report it here just in case people bumped into the same issue.

2

Wow, that’s bonkers! Thanks for raising it. Looks like a fun deadlock:

7185166--861739--upload_2021-5-28_11-57-33.png
7185166--861739--upload_2021-5-28_11-57-33.png1192×471 64.5 KB

3

Thanks for the fast response, weird how the deadlock only comes up with small collisions.

4

The sphere being scaled that small actually ends up having zero triangles. They are all stripped out below a size threshold. I don’t think that is necessarily why the deadlock hits but more of a FYI.

5

Oh interesting thanks for sharing that, was wondering if it happened intentional or not. Hope you guys don’t have too much of an issue finding the cause of the deadlock!