tcfail204.hs:10:7: error: [GHC-18042] [-Wtype-defaults (in -Wall), Werror=type-defaults]
    • Defaulting the type variable ‘a0’ to type ‘Double’ in the following constraints
        (RealFrac a0)
          arising from a use of ‘ceiling’ at tcfail204.hs:10:7-13
        (Fractional a0)
          arising from the literal ‘6.3’ at tcfail204.hs:10:15-17
    • In the expression: ceiling 6.3
      In an equation for ‘foo’: foo = ceiling 6.3