Generic type parameters inheritance in closures

[makrostuff]

Hi,

I am not sure if this is a bug or rather a feature request?

I would like a generic function with type parameter T to return another generic function based on the same type parameter T. It looks like closures do not inherit type parameters from their parents and I am not aware of an explicit way to specify they should do so.
This makes the higher order function fail due to incompatiple types.

Example:

struct ParserResult[T] {
	val T
}

type ParserFunc[T] = fn (string) !ParserResult[T]

fn merge[T](f1 ParserFunc[T], f2 ParserFunc[T]) !ParserFunc[T] {
	return fn [T] (s string) !ParserResult[T] {       // error
		
		return f2(s)
	} 
}

fn f1 (s string) !ParserResult[string] {
	return ParserResult[string]{s + '_1'}
}

fn f2 (s string) !ParserResult[string] {
	return ParserResult[string]{s + '_2'}
}

merge[string](f1, f2)('abc') or { panic(err) }

Error:

code.v:8:9: error: cannot use `fn (string) !ParserResult[T]` as type `!fn (string) !ParserResult[string]` in return argument
    6 | 
    7 | fn merge[T](f1 ParserFunc[T], f2 ParserFunc[T]) !ParserFunc[T] {
    8 |     return fn [T] (s string) !ParserResult[T] {
      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    9 |         
   10 |         return f2(s)
Exited with error status 1

So, my question is, is there already a way to do this I am not aware of?
If not, should I file this as a bug or feature request?

Thanks!