PackedByteArray copied and converted to Array without error when passed to a function with typed arguments

[clubby789]

Tested versions

4.2.1.stable.arch_linux

System information

Godot v4.2.1.stable unknown - Manjaro Linux #1 SMP PREEMPT_DYNAMIC Fri Mar 15 21:05:45 UTC 2024 - X11 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 4060 (nvidia; 550.67) - Intel(R) Core(TM) i7-9700F CPU @ 3.00GHz (8 Threads)

Issue description

If a function has an Array-typed param, passing a PackedByteArray to it will not cause an error, and will silently convert the PBA to a normal Array (and making it effectively passed by value).

extends Node2D

func _ready():
    var val := PackedByteArray()
    val.resize(10)
    val.fill(0)
    print(val)  	# [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
    f1(val) 		# No error!
    print(val)	# [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

func f1(param: Array):
    param[5] = 10
    print(param) 	# [0, 0, 0, 0, 0, 10, 0, 0, 0, 0]

Steps to reproduce

Run the above code - there is no type error and val is not updated in _ready

Minimal reproduction project (MRP)

N/A

[KoBeWi]

Related #40249