invalid-bool-returned:36:4:36:16:FirstBadBool.__bool__:__bool__ does not return bool:UNDEFINED
invalid-bool-returned:43:4:43:16:SecondBadBool.__bool__:__bool__ does not return bool:UNDEFINED
invalid-bool-returned:50:4:50:16:ThirdBadBool.__bool__:__bool__ does not return bool:UNDEFINED
