invalid-repr-returned:36:4:37:21:FirstBadRepr.__repr__:__repr__ does not return str:UNDEFINED
invalid-repr-returned:43:4:44:16:SecondBadRepr.__repr__:__repr__ does not return str:UNDEFINED
invalid-repr-returned:50:4:51:34:ThirdBadRepr.__repr__:__repr__ does not return str:UNDEFINED
