Error: _queue_monitor_update: Parameter "get_space()" is null. when deleting an Area3D affecting a SoftBody3D

[LucidTaZ]

Tested versions

Reproducible in 4.3-stable

Not reproducible in 4.2.2-stable

System information

Godot v4.3.stable - macOS 14.6.1 - Vulkan (Forward+) - integrated Apple M2 Max - Apple M2 Max (12 Threads)

Issue description

When deleting an Area3D that blows wind on a SoftBody3D, the below error is printed:

E 0:00:01:0112   _queue_monitor_update: Parameter "get_space()" is null.
  <C++ Source>   servers/physics_3d/godot_area_3d.cpp:214 @ _queue_monitor_update()

The Area3D is deleted through a queue_free() call.

Steps to reproduce

Scene contains:

• SoftBody3D with a mesh (QuadMesh works)
• Area3D with a CollisionShape3D
• Both can be at default settings (layer, mask, etc.) as long as the SoftBody3D is inside the Area
• I found this issue in my Area3D's that cause wind to blow on the SoftBody3D, although it also happens when the wind parameters are left on the defaults

Minimal reproduction project (MRP)

softbody3d-wind-issue-reproduction.zip

[matheusmdx]

Bisecting points to #81809 as the culprit, @Rindbee

[Rindbee]

It seems that the soft_body was forgotten when adding the get_space() check code in GodotArea3D::remove_*_from_query().