Bug 254 – Interfaces with the same function can give 3 different error messages

This part remains the same. ------------------------------------ interface foo { void blah (); } interface bar { int blah (); } ------------------------------------ class blah : foo, bar { int blah () {} } test.d(10): function test.blah.blah of type int() overrides but is not covariant with test.foo.blah of type void() ------------------------------------ class blah : bar, foo { int blah () {} } test.d(10): function test.blah.blah expected to return a value of type int ------------------------------------ class blah : foo, bar { void blah () {} } test.d(9): class test.blah interface function bar.blah isn't implemented ------------------------------------ All of the error messages are technically correct, but only one of them should be returned.

Since the error messages are still valid, it doesn't matter that they differ.