[Haskell-cafe] instance Binary UTCTime (Was: Oprhan instances)

[Bas van Dijk]

On Mon, Nov 30, 2009 at 11:35 AM, Duncan Coutts
<duncan.coutts at googlemail.com> wrote:
> Ah but flags are not allowed to change the public exported API of a
> library.

I wasn't aware of this. Where is this documented?

The reason I ask is because I have a small package on hackage that
violates this:

http://hackage.haskell.org/package/to-string-instances

regards,

Bas