Misleading error when starting thread on Node member function with missing argument binding

[briansemrau]

Godot version

4.1.rc2

System information

Windows 10

Issue description

Prior to 4.1, I was able to start a thread from a Node that ran a member function:

extends Node

var _thread: Thread = Thread.new()

func _ready():
    _thread.start(_run_thread)

func _run_thread(_userdata) -> void:
    # do work
    return

error:

E 0:00:01:0862   Node::get_script: Caller thread can't call this function in this node (/root/Game/InfiniteCubeTerrain). Use call_deferred() or call_thread_group() instead.
  <C++ Error>    Condition "!is_accessible_from_caller_thread()" is true. Returning: (Variant())
  <C++ Source>   scene\main\node.cpp:3540 @ Node::get_script()

This functionality remains broken after the threading changes in 4.1, which was not restored for my use case by #78000.

I cannot call Thread.set_thread_safety_checks_enabled(false) because my run function is prevented from starting.

It looks like this would work if I was using a Reference type, not a Node type:

https://github.com/godotengine/godot/blob/46424488edc341b65467ee7fd3ac423e4d49ad34/scene/main/node.cpp#L3539-L3542C2

Steps to reproduce

See above

Minimal reproduction project

N/A

[heppocogne]

Passing an argument solves the issue in this case:

func _ready():
	_thread.start(_run_thread.bind("a"))

The error message is wrong.

[briansemrau]

Passing an argument solves the issue in this case

Have you tested it? This does not fix the issue in my project.

Looks like this works in a minimal example. Not sure what's different in my project that causes this to break.

[briansemrau]

Looks like the errors were quite misleading. Thank you for the help.