invalid-length-hint-returned:38:4:38:23:FirstBadLengthHint.__length_hint__:__length_hint__ does not return non-negative integer:UNDEFINED
invalid-length-hint-returned:45:4:45:23:SecondBadLengthHint.__length_hint__:__length_hint__ does not return non-negative integer:UNDEFINED
invalid-length-hint-returned:52:4:52:23:ThirdBadLengthHint.__length_hint__:__length_hint__ does not return non-negative integer:UNDEFINED
