The for loop thinks the open array of NSObject is an ObjectiveC array and thus gives me an error. Is this a bug?

=====================

{$mode objfpc}
{$modeswitch objectivec2}
program test;
uses
  CocoaAll;
procedure Test(input: array of NSObject);
var
  obj: NSObject;
begin
  // Incompatible types: got "{Open} Array Of NSObject" expected "NSFastEnumerationProtocol"
  for obj in input do
    ;
end;
begin
end.

Regards,
Ryan Joseph