godot crushes when trying to create convex static body

[TheSkyOne]

Godot version:
godot 3.1 beta 6

OS/device including version:
windows 7 ultimate

Issue description:
when trying to create a convex static body/convex collision sibling for a mesh with a capsule shape godot crushes
also, getting the following errors while the console is running while godot is crushing:
ERROR: build: Condition ' O == __null ' is true. Continuing..:
At: core/math/quick_hull.cpp:402
ERROR: build: Condition ' !F ' is true. Continuing..:
At: core/math/quick_hull.cpp:399

Steps to reproduce:

• create a new godot project
• create a mesh instance
• press on the mesh, then open the mesh menu at the top
• choose "create convex static body" / "create convex collision sibling"

note: sorry that this is a duplicate, there are 2 other issues related but they are outdated (from 2017, and february 2018) and i wanted to bring it to attention again

i also dont know how to refrence issues, so here are the links:

• Issue with collision creation from mesh #15010
• Godot crashes on project load in QuickHull::build #16560

[hpvb]

Can you please share the mesh you're trying to generate the collision sibling on? Without the mesh in question it is going to be hard to track this down.

[Chaosus]

This is also probably related - #21141(although its not crashes - its entered to endless loop instead), @reduz said that he will rewrite this system in 3.2 (or implement another thirdparty library for do it)

[TheSkyOne]

hpvb, its a regular capsule shape provided by godot, nothing special

[baudren]

Does the editor completely crashes and exit or it stays open, being unresponsive? If it's the latter, then it looks IMO as a duplicate of #21141 and we could close this one, since it happens on the same meshes (capsule at least, probably spheres as well?).

Could you please specify if it's either a crash to desktop (application closes) or a freeze (stays open unresponsive)?

[akien-mga]

That's a duplicate of #21141 indeed. It can cause a crash with a stack overflow.