Fehler in FixInsight? (W521)

[freimatz]

Delphi-Quellcode:

unit FixInsight;

interface

implementation

type
  TEnum = (dummy1, dummy2);

function TestFixInsight(): TEnum;
begin
  Exit(TEnum.dummy1)
end;

end.

FixInsight meldet "[FixInsight Warning] FixInsight.pas(10): W521 Return value of function 'TestFixInsight' might be undefined".
Ist das ein Bug?