DisplayServer file_dialog_show callable callback not firing.

[grumpOldman]

Godot version

v4.2.dev6.official [57a6813]

System information

Windows 10, Forward+

Issue description

Callable isn't called.

Tried function and lambda.

Steps to reproduce

Simple, Use provided script.

Minimal reproduction project

extends Node
	
func _ready():
	var error = DisplayServer.file_dialog_show("Select GDScripts", "C:/", "", false, DisplayServer.FILE_DIALOG_MODE_OPEN_FILES, PackedStringArray(["*.gd"]), process_files)
	if error == OK:
		print("file dialog is working")

func process_files(status, files, index):
	print("file dialog callback is working")
	print(status)

[KoBeWi]

Your callable has too many arguments.
Isn't there any error in the output?

[AThousandShips]

This calalble is supposed to take three arguments

[KoBeWi]

But the documentation says

Callbacks have the following arguments: bool status, PackedStringArray selected_paths.

Where the index comes from?

[AThousandShips]

It says:

Callbacks have the following arguments: bool status, PackedStringArray selected_paths, int selected_filter_index.

[akien-mga]

This was changed intentionally in #81218.

It's a new feature in 4.2 so breaking compat between dev snapshots is ok.

[KoBeWi]

Well I don't see this in dev6, which explains this issue.

Godot version
v4.2.dev6.official

EDIT:

I tested and indeed the code works on master, but not in dev6, which is expected. However there is no proper error reporting when the callable fails. It needs the same treatment as in #82194