Cannot change existing value in a constant dictionary

[b0z1]

Godot version

4.0-beta12_win64

System information

Windows 10, 64 Bit

Issue description

The following code throws an error "Cannot assign a new value to a constant."

const _static = { initialized=false, config={} }

static func _initialize():
	_static.initialized = true

In Godot 3 this worked and i used it mainly for singletons. So i depend on it.
According to the documentation this should work.

Link: https://docs.godotengine.org/en/latest/tutorials/scripting/gdscript/gdscript_basics.html
Statement:

Since objects, arrays and dictionaries are passed by reference, constants are "flat". This means that if you declare a constant array or dictionary, it can still be modified afterwards. They can't be reassigned with another value though.

Steps to reproduce

1. Create an gd script
2. Define a const dictionary with some initial values
3. Try to change those values
4. Error

Minimal reproduction project

See reproduction steps

[b0z1]

My guess is this MR broke it: e6c443a

[b0z1]

Okay after debugging the issue further, this MR broke it: 5e2ac1a

[akien-mga]

This was changed on purpose, see #71051.

The documentation needs to be updated.

We plan to add support for proper static variables in the future.