I'm strongly against this, for a multitude of reasons. There's already a
mechanism for doing what you want -- type defaulting. See also
https://ghc.haskell.org/trac/ghc/ticket/8171 .

On 12/5/2015 11:38 PM, David Feuer wrote:
> The ambiguity check produces errors that are quite surprising to the
> uninitiated. When the check is suppressed, the errors at use sites are
> typically much easier to grasp. On the other hand, there's obviously a lot
> of value to catching mistakes as soon as possible. Would it be possible to
> turn that into a warning by default?
>
>
>

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