Autocomplete fails on structure with @:optional function

[haxiomic]

If a structure type has an @:optional function field, autocomplete fails when trying to complete structure fields

Repro

class Main {
	static function main() {
		example({
			// try autocomplete in here
		});
	}
	
	static function example(options: {
		@:optional var field: String; // this works fine
		@:optional /*dynamic*/ function callback(): Void; // breaks autocomplete (with or without dynamic)
	}) {

	}
}

This works if you remove @:optional from function callback(). Tested haxe 4.0.5 and 4.2.0 development branch

[haxiomic]

Maybe related to #409 which seems to have started happening again