That's strange. This code works in Godot 4.0-beta6:
extends Node2D
func _ready() -> void:
if not visible:
return
print_debug(deg_to_rad(180.0))
print_debug(rad_to_deg(PI))
There are no errors or warnings, and the output is:
3.14159265358979
At: res://deg_to_rad.gd:9:_ready()
180
At: res://deg_to_rad.gd:10:_ready()
