ICE when generic interfaces use forward class declaration
FPC 3.2.3 win64, Laz 2.2.0-66 Win64
Try to compile it - and you get an Internal Compiler Error on the interface's method declaration.
```
program Project1;
{$Mode Delphi} {$H+}
Type
TImplClass<P> = class;
iLinkingIntf<P> = interface
procedure NestedCall(const DataFrom: TImplClass<P>);
end;
(* Компиляция проекта, цель: Project1.exe: Код завершения 1, ошибок: 1
Project1.pas(9,55) Error: Internal error 2012101001
*)
{ TImplClass }
TImplClass<P> = class( TInterfacedObject, iLinkingIntf<P> )
protected
procedure NestedCall(const DataFrom: TImplClass<P> );
end;
{ TImplClass }
procedure TImplClass<P>.NestedCall(const DataFrom: TImplClass<P>);
begin
end;
begin
end.
```
issue