invalid-bool-returned:36:4:37:16:FirstBadBool.__bool__:__bool__ does not return bool:UNDEFINED
invalid-bool-returned:43:4:44:21:SecondBadBool.__bool__:__bool__ does not return bool:UNDEFINED
invalid-bool-returned:50:4:51:24:ThirdBadBool.__bool__:__bool__ does not return bool:UNDEFINED
