[GHC] #9590: AMP breaks `haskell2010` package

[GHC]

#9590: AMP breaks `haskell2010` package
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        Reporter:  hvr               |                   Owner:  ekmett
            Type:  bug               |                  Status:  closed
        Priority:  high              |               Milestone:  7.10.1
       Component:  Core Libraries    |                 Version:  7.9
      Resolution:  fixed             |                Keywords:  AMP,
Operating System:  Unknown/Multiple  |  report-impact
 Type of failure:  GHC rejects       |            Architecture:
  valid program                      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D510
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Comment (by hvr):

 Fyi, here's an attempt at updating/reviving the `haskell2010` package:

 http://git.haskell.org/packages/haskell2010.git/commitdiff/refs/heads/wip/T9590

 but it's unsatisfying at this moment; as expected, `do`-syntax still
 refers to the `base`-version of the `Monad`-class, so you need to use
 `-XRebindableSyntax` and be careful to bring into local scope whatever
 functions are needed for syntax desugaring.

 Maybe we can improve the alternative-Prelude support in GHC 7.12 to allow
 a more seamless `-XRebindableSyntax` support which is less brittle, and
 allows to better emulate a strict `haskell2010` mode, which only requires
 to select the respective `-XHaskell....` flag for the language-part, and
 the respective `Prelude`-providing library-package instead of `base`, and
 would then drop you into a (reasonably) strictly standard-conforming
 language+std-library environment...

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9590#comment:18>
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