Cabal not updated after rebase?

[Richard Eisenberg]

Did you change the Cabal submodule at all in your work? Maybe it's out of sync somehow...

What happens if you build GHC without including your changes? Does it work?

> On Dec 3, 2018, at 12:13 PM, My Nguyen <mnguyen1 at brynmawr.edu> wrote:
> 
> Hello,
> 
> Thanks for the suggestion. Unfortunately, the problem persists :(! 
> 
> My 
>  
> From: Krzysztof Gogolewski <krz.gogolewski at gmail.com>
> Sent: Monday, December 3, 2018 2:46 PM
> To: My Nguyen
> Cc: ghc-devs at haskell.org
> Subject: Re: Cabal not updated after rebase?
>  
> Hi,
> 
> Does `git clean -fdx .` in libraries/Cabal help? git clean doesn't go into submodules.
> 
> -Krzysztof
> 
> On Mon, Dec 3, 2018 at 6:09 PM My Nguyen <mnguyen1 at brynmawr.edu <mailto:mnguyen1 at brynmawr.edu>> wrote:
> Hi all,
> 
> I've finished quite a big rebase and was trying to rebuild, but it failed with:
>>> ghc-cabal: Encountered missing dependencies:
>>> Cabal ==2.5.*
> I then tried applying my patch on a fresh checkout of GHC and found the reason:
> 
> 
> libraries/Cabal/Cabal/Distribution/Compat/Prelude.hs:119:1:error:
>    Bad interface file: libraries/Cabal/Cabal/dist-boot/build/Distribution/Compat/Binary.hi
>        Something is amiss; requested module  Cabal-2.4.0.1:Distribution.Compat.Binary differs from name found in the interface file Cabal-2.5.0.0:Distribution.Compat.Binary (if these names look the same, try again with -dppr-debug)
>    |
> 119 |import Distribution.Compat.Binary   (Binary (..))
>    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> libraries/Cabal/Cabal/Distribution/Compat/Prelude.hs:120:1:error:
>    Bad interface file: libraries/Cabal/Cabal/dist-boot/build/Distribution/Compat/Semigroup.hi
>        Something is amiss; requested module  Cabal-2.4.0.1:Distribution.Compat.Semigroup differs from name found in the interface file Cabal-2.5.0.0:Distribution.Compat.Semigroup (if these names look the same, try again with -dppr-debug)
>    |
> 120 |import Distribution.Compat.Semigroup (Semigroup (..), gmappend, gmempty)
>    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> libraries/Cabal/Cabal/Distribution/Compat/Prelude.hs:141:1:error:
>    Bad interface file: libraries/Cabal/Cabal/dist-boot/build/Distribution/Compat/Stack.hi
>        Something is amiss; requested module  Cabal-2.4.0.1:Distribution.Compat.Stack differs from name found in the interface file Cabal-2.5.0.0:Distribution.Compat.Stack (if these names look the same, try again with -dppr-debug)
>    |
> 141 |import Distribution.Compat.Stack
>    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> 
> I'm sure I did `git module update`; I even `git clean` everything and  `make` from fresh but somehow the cabal still isn't updated. Can anyone help me on why this is happening and how to fix it?
> 
> Thanks so much,
> My
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