[GHC] #7958: 'Cannot continue after interface file error' during compilation

[GHC]

#7958: 'Cannot continue after interface file error' during compilation
--------------------------------------+-------------------------------------
Reporter:  jstolarek                  |          Owner:                  
    Type:  bug                        |         Status:  new             
Priority:  normal                     |      Component:  Compiler        
 Version:  7.7                        |       Keywords:                  
      Os:  Unknown/Multiple           |   Architecture:  Unknown/Multiple
 Failure:  GHC rejects valid program  |      Blockedby:                  
Blocking:                             |        Related:                  
--------------------------------------+-------------------------------------
 I'm trying to compile [http://hackage.haskell.org/package/test-framework-
 hunit `test-framework-hunit-0.3.0`] library using HEAD. Running these
 commands:

 {{{
 ghc Setup.lhs && \
 ./Setup configure --user --enable-shared && \
 ./Setup build && ./Setup install
 }}}

 gives me this error:

 {{{
 Installing package test-framework-hunit-0.3.0
 [1 of 1] Compiling Main             ( Setup.lhs, Setup.o )
 Linking Setup ...
 Configuring test-framework-hunit-0.3.0...
 Building test-framework-hunit-0.3.0...
 Preprocessing library test-framework-hunit-0.3.0...
 [1 of 1] Compiling Test.Framework.Providers.HUnit (
 Test/Framework/Providers/HUnit.hs,
 dist/build/Test/Framework/Providers/HUnit.o )
 /home/killy/.cabal/lib/x86_64-linux-ghc-7.7.20130602/test-
 framework-0.8/Test/Framework/Core.hi
 Declaration for Test
 Constructor Test.Framework.Core.Test:
   Iface type variable out of scope:  i
 Cannot continue after interface file error
 }}}

 This error refers to `test-framework-0.8`, which is a previously installed
 library (also compiled with HEAD) that `test-framework-hunit` depends on.
 This didn't happen on HEAD 12 days ago, so I think it must be some recent
 change that broke this.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7958>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler