Cannot assign Method to Function References with Generic Return

Summary

The compiler does not recognize the function signature is the same for functions which use generic specialization in their return value

System Information

FPC Trunk on Linux x64

Steps to reproduce

Example Project

program Project1;

{$mode objfpc}{$H+}
{$ModeSwitch functionreferences}

type
  generic TMyClass<T> = class
  public type
    tmyfun = reference to function: specialize TArray<T>;
  public
    f: tmyfun;
    function fun: specialize TArray<T>;
    constructor Create;
  end;

function TMyClass.fun:specialize TArray<T>;
begin
end;

constructor TMyClass.Create;
begin
  f := @fun; // project1.lpr(25,8) Error: Incompatible types: got "<procedure variable type of function:{Dynamic} Array Of TMyClass$1.T of object;Register>" expected "TMyClass$1.TMYFUN"
end;

begin
end.