readFail042.hs:9:9:
    Unexpected transform statement in a list comprehension
    Use TransformListComp

readFail042.hs:9:9:
    Unexpected transform statement in a list comprehension
    Use TransformListComp

readFail042.hs:11:23: Not in scope: ‘by’

readFail042.hs:11:26: Not in scope: ‘x’