Making a CSG Mesh visible again crashes Godot 4.2 beta4

[bsil78]

Godot version

4.2-beta4

System information

Windows 10 - Godot 4.2 beta4 - NVIDIA GForce GTX 970 - Forward+

Issue description

Switching visibility of a CSG Mesh back to visible makes Godot to crash.

This was not the case in beta3 or previous ones.

It could be related to #84174 of @jsjtxietian (merged by @akien-mga) as it touches modules/csg/csg_shape.cpp.

Steps to reproduce

In a simple 3D, adding any CSG mesh, hiding node, then showing it back crashes editor.

In example project, I put an editor script in order to test by script ; here is awaited output :

hiding : MeshInstance3D OK
showing : MeshInstance3D OK
hiding : CSGMesh3D OK
showing : CSGMesh3D OK
hiding : CSGBox3D OK
showing : CSGBox3D OK

Minimal reproduction project

4.2-beta4-csg-mesh-visbility-bug.zip

[jsjtxietian]

Thanks for reporting, I will take a look asap.

[AThousandShips]

My suspicion is that root_collision_shape isn't guaranteed to be non-null and that causes the crash