[Haddock] ghc-7.6.2 breaks haddock interface...

[Simon Hengel]

On Wed, Dec 12, 2012 at 12:30:10PM +0100, Joachim Breitner wrote:
> Hi Simon,
> 
> Am Mittwoch, den 12.12.2012, 12:15 +0100 schrieb Simon Hengel:
> > On Wed, Dec 12, 2012 at 12:20:35AM +0100, Joachim Breitner wrote:
> > > there really a change to the on-disk format of the .haddock files?
> > 
> > Yes, the on-disk format changed, hence the interface version was bumped
> > from 21 to 22.  But Haddock can still read files with interface version
> > 21 (see [1]).
> 
> great! I was considering asking for backwards compatibility, but then
> tought it might be a bit too much.
> 
> For now I’ll hardcode the information that haddock support interface
> version 21 in our package metadata, but this is error prone. Would you
> mind adding an option akin to
> $ haddock --interface-version
> that would print all versions (e.g. space separated)?
> 
> $ haddock --compatible-interface-versions
> 21 22

Should be easy.  Can you open a ticket?  (of course, patches are always
welcome ;)

Cheers,
Simon