rnfail017.hs:5:10:
    Precedence parsing error
        cannot mix ‘+’ [infixl 6] and prefix `-' [infixl 6] in the same infix expression

rnfail017.hs:6:10:
    Precedence parsing error
        cannot mix ‘*’ [infixl 7] and prefix `-' [infixl 6] in the same infix expression