On 2/1/26 15:29, Martin Frb via fpc-devel wrote: >[...] > TIntfBarBase = interface > function GetFoo: TIntfFooBase; > end; > TIntfBar = interface(TIntfBarBase) > function GetFoo: TIntfFoo; reintroduce; reintroduce is not allowed in Delphi and should not in fpc neither. Mattias