Some warnings disappear with -Werror

With q.hs:

module Foo where

foo :: Int
foo = ceiling 6.3

I get:

$ ghc -fforce-recomp -c q.hs -Wall

q.hs:5:6:
    Warning: Defaulting the following constraint(s) to type `Double'
             `RealFrac t' arising from a use of `ceiling' at q.hs:5:6-16
    In the expression: ceiling 6.3
    In the definition of `foo': foo = ceiling 6.3
$ ghc -fforce-recomp -c q.hs -Wall -Werror
$

Trac metadata

Trac field	Value
Version	6.11
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
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