Error when creating physical skeleton in TPS demo

[akien-mga]

Godot version:
Current master (8ba0d51)

OS/device including version:
Mageia 7 x86_64

Issue description:
When selecting "Create Physical Skeleton" in the player.tscn's Skeleton of the TPS demo, the following error is printed:

ERROR: get_bone_parent: Index p_bone=-1 out of size (bones.size()=112)
   At: scene/3d/skeleton.cpp:481.
ERROR: erase: Condition ' !p_I ' is true. returned: false
   At: ./core/list.h:157.

Might be an issue with the model itself, but worth investigating nevertheless.

CC @AndreaCatania

Steps to reproduce:

• Clone TPS demo and open it (import takes a while, maybe a simpler reproducer can be found) or use MRP below (only player.tscn with dae and .import folder, 100 MB)
• Open player.tscn, select Skeleton, select "Create Physical Skeleton"
• See console

Minimal reproduction project:
player.tscn scene only

[akien-mga]

I added a minimal reproduction project with only the player.tscn scene and its dae (and assets pre-imported), takes 100 MB. Will only be up for 7 days.

[TheMikirog]

The issue is still there and it appeared once I ported my project from 3.0 to 3.1
Again, no errors like it in 3.0. Doesn't seem to matter that much, since everything is working, but that error spam is really annoying.
Index p_bone=-1 out of size (bones.size()=16)

[AndreaCatania]

I didn't checked the code yet, but seems a model problem. Who is managing this project?

[pouleyKetchoupp]

The second error is fixed with #34028.

There was a bone attachment on one of the bones that was causing an error when trying to erase bound nodes on bones. For most of them it doesn't trigger the error because the list is empty, and an error was triggered for the only one with a bone attachment.