program SmallTestInterfaceRTTI; {$mode objfpc}{$H+} uses classes, typinfo; type IMyNewMPInterface = interface(IInvokable) ['{AA503475-0187-4108-8E27-41475F4EF818}'] procedure TestStdCall(LongParaName: TObject; const B: string; var C: integer; out D: byte); stdcall; end; var ti:PTypeInfo; td : PTypeData; begin ti:=TypeInfo(IMyNewMPInterface); td := GetTypeData(ti); // this gives an error (e.g. wrong data) on aarch64. // after patch of ncgrtti.pas, data is correct (unit name) if ti^.Kind = tkInterface then begin writeln('IntfUnit: ',td^.IntfUnit); if td^.IntfUnit<>'SmallTestInterfaceRTTI' then halt(1); end else halt(2); end.