Crash when tweening between cameras rapidly

[aa-tan]

Trying to follow the 3D Third Person example scene to create a third person camera and a close up "aiming" camera view. When switching between cameras rapidly the scene crashes. (i.e. when spamming right-click.)

edit: further testing indicates the behavior only occurs when switching from far away view to the aim camera
edit: narrowed down the issue to interrupting the tween from AimCamera -> ThirdPersonCamera. Changing the ThirdPersonCamera tween duration to a longer duration like 4s, then right-clicking at any moment during that tween causes the issue.

Node tree as follows:

Code largely follows the 3d Third Person example scene:

@onready var _player_pcam: PhantomCamera3D = $ThirdPersonCamera
@onready var _aim_cam: PhantomCamera3D = $visuals/AimCamera

func _unhandled_input(event):
	if _player_pcam.get_follow_mode() == _player_pcam.FollowMode.THIRD_PERSON:
		var active_pcam: PhantomCamera3D
		_set_pcam_rotation(_player_pcam, event)
	if _player_pcam.get_priority() > _aim_cam.get_priority():
		check_aiming(event)
	else:
		check_aiming(event)

func check_aiming(event: InputEvent) -> void:
	if event is InputEventMouseButton:
		if event.is_action_pressed("aim"):
			if _player_pcam.get_priority() > _aim_cam.get_priority():
				_aim_cam.set_priority(30)
				_player_pcam.set_priority(0)
			elif _aim_cam.get_priority() > _player_pcam.get_priority():
				_player_pcam.set_priority(30)
				_aim_cam.set_priority(0)

Would appreciate any help debugging this!

[aa-tan]

I should clarify the 4 errors in screenshot are warnings regarding unused variables. Should be irrelevant but will add a screenshot just in case:

[aa-tan]

Example video. Initial clicks are slow, then a double/triple click of RMB causes the error
https://github.com/user-attachments/assets/6a086d58-4398-4998-abfd-66f580322095

[aa-tan]

Solved! AimCamera did not have a Camera 3D Resource out of the box, and it needs to be created if I want tweening to work properly.