Disabling a RigidBody3D node connected to a Joint causes a crash

[Frozenreflex]

Godot version

v4.0.1.stable.mono.official.cacf49999

System information

Linux Mint

Issue description

Setting a RigidBody3D's process mode to Disabled while it is connected with a joint, on either end, either in the inspector or with code, will crash (whenever it gets set to disabled, or instantly on run when set in inspector) with no error outputs. I haven't tested 2D nodes.

Steps to reproduce

Create two RigidBody3Ds, connect them with a PinJoint3D, set the processing mode on one of them to disabled, try to run, crash.

Minimal reproduction project

N/A

[Calinou]

@Frozenreflex Please upload a minimal reproduction project to make this easier to troubleshoot.

[Frozenreflex]

GodotBug.zip

[Occalepsus]

Hi! What would the expected behaviour of such a thing? Should the joint consider it only has one body attached? Should it disable too and leave the other body do its own things?
I have a first fix so that the crash does not happen, but the behaviour of the joint connected to a body and a disabled one is weird, so i would like to know how i should fix that.