readFail042.hs:10:9:
    Unexpected transform statement in a list comprehension
    Use -XTransformListComp

readFail042.hs:11:9:
    Unexpected transform statement in a list comprehension
    Use -XTransformListComp

readFail042.hs:11:23: Not in scope: `by'

readFail042.hs:11:26: Not in scope: `x'