tcfail186.hs:7:9: error: [GHC-83865]
    • Couldn't match type ‘[Char]’ with ‘Int’
      Expected: PhantomSyn a0
        Actual: String
    • In the first argument of ‘f’, namely ‘"hoo"’
      In the expression: f "hoo"
      In an equation for ‘foo’: foo = f "hoo"