Maybe I'm missing something here, but how does specifying TypeHoles make GHC 
not compliant with Haskell 2010? Turning on TypeHoles should change only error 
messages. The set of programs that compile (and their meanings) should remain 
unchanged, by my understanding.

I'm mildly in favor of this change, but I agree that perhaps a conversation on 
the users list and/or waiting a cycle isn't a bad idea.

Richard

On Jan 13, 2014, at 4:51 AM, Simon Marlow <marlo...@gmail.com> wrote:

> On 12/01/2014 22:56, Krzysztof Gogolewski wrote:
>> I propose to enable -XTypeHoles in GHC by default.
> 
> GHC supports strict Haskell 2010 by default, and enabling any extensions 
> breaks that property.  That's why we don't have any extensions on by default.
> 
> Cheers,
>       Simon
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