On Jan 21, 2015 9:53 AM, "Stephen Paul Weber" <singpolyma@singpolyma.net> wrote:

> Having them on by default mean that valid Haskell2010 programs might get rejected by GHC by default, which is a pretty bad state of affairs.

It would be if it were true. But it's not. All that changes is that you get different error messages in some cases.