[Bug 1027172] New: FTBFS: ghc: panic! (the 'impossible' happened)

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1027172

            Bug ID: 1027172
           Summary: FTBFS: ghc: panic! (the 'impossible' happened)
           Product: Fedora
           Version: 20
         Component: ghc-uniplate
          Severity: medium
          Priority: medium
          Assignee: petersen(a)redhat.com
          Reporter: karsten(a)redhat.com
        QA Contact: extras-qa(a)fedoraproject.org
                CC: haskell-devel(a)lists.fedoraproject.org,
                    petersen(a)redhat.com



Description of problem:
[ 2 of 21] Compiling Data.Generics.Uniplate.Internal.Utils (
Data/Generics/Uniplate/Internal/Utils.hs,
dist/build/Data/Generics/Uniplate/Internal/Utils.o )
ghc: panic! (the 'impossible' happened)
  (GHC version 7.6.3 for powerpc64-unknown-linux):
    Cant do annotations without GHCi
    {Data/Generics/Uniplate/Internal/Utils.hs:27:19-33}
    base:GHC.Exts.ForceSpecConstr{d rbCb}
Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

Version-Release number of selected component (if applicable):
ghc-uniplate-1.6.10-3.fc20

How reproducible:
always

Steps to Reproduce:
1. ppc-koji build --scratch f20 ghc-uniplate-1.6.10-3.fc20.src.rpm
2.
3.

Actual results:
http://ppc.koji.fedoraproject.org/koji/taskinfo?taskID=1511028

Expected results:


Additional info:
Most likely this package needs an exclusivearch %{ghc_arches_with_ghci}, but if
can fix it with some patch, even better.

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