Re: Oddity with 'cabal install' in GHC 7.4.1

On Sat, Feb 4, 2012 at 9:51 PM, Andres Löh wrote:

Hi Conal.

On Sun, Feb 5, 2012 at 12:36 AM, Conal Elliott wrote:

...

Since upgrading to 7.4.1, if I 'cabal install' successfully and then 'cabal install' a second time without first doing a 'ghc-pkg unregister <package-name>', I get the following complaint:

[...]

The warning is intended to prevent you from breaking your system without knowing that you know that you're running a potentially dangerous cabal invocation.

The --force-reinstalls flag should always make it build. If it doesn't, it's a bug.

In addition, I'm planning to make the warning a little bit less aggressive before the release.

Before the release of what? (seeing as GHC 7.4.1 has been released)

...

The only path I've found so far that's willing to rebuild or even say nothing needs rebuilding (when nothing does) is to 'ghc-pkg unregister' and then 'cabal install' again. I'm getting the same behavior on Red Hat 5 and Mac OS 10.6.8, both compiled from sources.

I'd be surprised if the OS matters. But as I said, I've not yet encountered a situation where it wouldn't build given --force-reinstalls.

Cheers,  Andres

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