Fix some warnings: these should go into 2.10

3 patches for repository darcs-unstable@darcs.net:screened:

Tue Mar  3 19:06:41 GMT 2015  Ganesh Sittampalam <ganesh@earth.li>
  * ErrorT is deprecated, switch to ExceptT
  
  The two have different 'fail' implementations, but as far as
  I can see we don't have any explicit calls to that or any
  inexhaustive pattern matches in the relevant code.
  

Wed Mar  4 06:10:30 GMT 2015  Ganesh Sittampalam <ganesh@earth.li>
  * fix GHC 7.10 warning: explicitly quantify variables in type alias

Wed Mar  4 06:29:06 GMT 2015  Ganesh Sittampalam <ganesh@earth.li>
  * Turn off deprecation warning for use of 'parseTime' for now

Attachments

• errort-is-deprecated_-switch-to-exceptt.dpatch
• patch-preview.txt
• unnamed

This breaks the build on my machine:

src/Darcs/Repository/ApplyPatches.hs:34:8:
    Could not find module `Control.Monad.Except'
    Perhaps you meant
      Control.Monad.Cont (from mtl-2.1.1)
      Control.Monad.Error (from mtl-2.1.1)
      Control.Monad.List (from mtl-2.1.1)

Sorry about that! Can you let me know what versions of mtl, 
transformers and transformers-compat you've got for this build? (I 
guess mtl=2.1.1 from the error message)

I'm getting this with ghc 7.6.3:

```
src/Darcs/Repository/ApplyPatches.hs:34:8:
    Could not find module `Control.Monad.Except'
    Perhaps you meant
      Control.Monad.Base (needs flag -package transformers-base-0.4.3)
      Control.Monad.Morph (needs flag -package mmorph-1.0.4)
      Control.Monad.Cont (needs flag -package monads-tf-0.1.0.1)
    Use -v to see a list of the files searched for.
Failed to install darcs-2.11.0
```

It tried to build darcs with transformers-compat-0.4.0.3.

"ghc-pkg list" tells me I have mtl-2.1.2 and transformers-0.3.0.0 installed.

This should fix the build break, apologies for the mistake.

1 patch for repository darcs-unstable@darcs.net:screened:

Wed Mar  4 22:41:39 GMT 2015  Ganesh Sittampalam <ganesh@earth.li>
  * replace pointless import of Control.Monad.Except
  
  This fixes the build with mtl<2.2.1

Attachments

• patch-preview.txt
• replace-pointless-import-of-control_monad_except.dpatch
• unnamed

Confirmed, build works again. Thanks.

Accepted (also into 2.10).