Rebuilding ghc changes interface hashes?

[Matthias Kilian]

On Tue, Apr 05, 2011 at 09:59:23PM +0530, Joachim Breitner wrote:
> Also, the initial upload was built using ghc-6.12.1, while the upload
> now is build with ghc-7.0.2. Given that it is a two-stage compiler, I
> assume that the output should be identical, but it seems not to be the
> case.

Changing the bootstrapping compiler changes the ABIs. The same can
happen if you interrupt and restart the build.

http://hackage.haskell.org/trac/ghc/ticket/4012

Ciao,
	Kili