how to checkout proper submodules

[Johan Tibell]

Unfortunately we don't use submodules for all repos e.g. base. This makes
it very hard to accurately check out a previous state and bisect errors
unfortunately.


On Tue, Jun 4, 2013 at 6:07 PM, Kazu Yamamoto <kazu at iij.ad.jp> wrote:

> Hi,
>
> Andreas and I found that the new IO manager is not working properly in
> the current GHC head. I'm sure that it worked well at least on May 7.
>
> We need to narrow the range of commits, so I did:
>
>   % git checkout bb2795db36b36966697c228315ae20767c4a8753
>   % git submodule update
>
> But this does not checkout proper submodules. For instance,
> libraries/base has newer commits. And of cource, building fails.
>
> Please tell us how to checkout proper submodules against a specific
> GHC tree.
>
> --Kazu
>
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