invalid-length-hint-returned:38:4:39:17:FirstBadLengthHint.__length_hint__:__length_hint__ does not return non-negative integer:UNDEFINED
invalid-length-hint-returned:45:4:46:18:SecondBadLengthHint.__length_hint__:__length_hint__ does not return non-negative integer:UNDEFINED
invalid-length-hint-returned:52:4:53:24:ThirdBadLengthHint.__length_hint__:__length_hint__ does not return non-negative integer:UNDEFINED
