[GDScript 2.0] [regression] complex constant parse error

[Scony]

Godot version

master #fb176d5f6e6dc2b43c630a041a8ab7d737173ec4

System information

manjaro linux

Issue description

following script:

const X = {
	'x': [],
}

yields

SCRIPT ERROR: Parse Error: Initializer for a constant must be a constant expression.
          at: GDScript::reload (res://tests/potential-godot-bugs/const-dict.gd:1)
ERROR: Method/function failed. Returning: ERR_PARSE_ERROR
   at: reload (modules/gdscript/gdscript.cpp:840)

while it was working in Godot 3.x

Steps to reproduce

compile

Minimal reproduction project

No response

[lyuma]

Closing as duplicate of #50285