[GHC] #7373: When building GHC: Failed to load interface for `GHC.Fingerprint'

[GHC]

#7373: When building GHC: Failed to load interface for `GHC.Fingerprint'
-------------------------------+--------------------------------------------
  Reporter:  igloo             |          Owner:                  
      Type:  bug               |         Status:  new             
  Priority:  normal            |      Milestone:  7.8.1           
 Component:  libraries/base    |        Version:  7.6.1           
Resolution:                    |       Keywords:                  
        Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
   Failure:  None/Unknown      |     Difficulty:  Unknown         
  Testcase:                    |      Blockedby:                  
  Blocking:                    |        Related:                  
-------------------------------+--------------------------------------------

Comment(by igloo):

 I've added a test `T7373` which shows what is going on. Currently it fails
 with:
 {{{
 +/home/ian/ghc/git/ghc/testsuite/tests/driver/T7373/pkg/dist/build/C.hi
 +Declaration for mkTyConApp
 +Unfolding of C.mkTyConApp:
 +  Failed to load interface for ‛B’
 +  There are files missing in the ‛pkg-0’ package,
 +  try running 'ghc-pkg check'.
 +  Use -v to see a list of the files searched for.
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7373#comment:7>
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