[GHC] #11023: ghci and ghc-pkg disagree about what's exposed

[GHC]

#11023: ghci and ghc-pkg disagree about what's exposed
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           Reporter:  dmwit          |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Package        |           Version:  7.10.2
  system                             |
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 I have installed vector-0.10.12.3 and vector-0.11.0.0. At some point, I
 had hidden both from the package database; however, I later used ghc-pkg
 expose to mark one as visible again. Now I seem to be in a strange state
 where ghci and ghc-pkg disagree about what is hidden:

 {{{
 % ghci-7.10.2
 GHCi, version 7.10.2: http://www.haskell.org/ghc/  :? for help
 Prelude> :m +Data.Vector.Unboxed

 <no location info>:
     Could not find module ‘Data.Vector.Unboxed’
     It is a member of the hidden package
 ‘vector-0.11.0.0 at vecto_3jMaUrldidp1bqsrn0qsS2’.
     It is a member of the hidden package
 ‘vector-0.10.12.3 at vecto_1COyUuV1LrA1IjYnWfJnbs’.
 Prelude>
 Leaving GHCi.
 % ghc-pkg-7.10.2 list vector | cat
 /usr/local/lib/ghc-7.10.2/package.conf.d:
     (no packages)
 /home/dmwit/.ghc/x86_64-linux-7.10.2/package.conf.d:
     vector-0.10.12.3
     (vector-0.11.0.0)

 % ghc-pkg-7.10.2 describe vector-0.10.12.3 | grep 'key:\|exposed:'
 key: vecto_1COyUuV1LrA1IjYnWfJnbs
 exposed: True
 }}}

 I have tried reproducing this with other packages in a handful of ways and
 failed; so I can't give instructions for reproducing. But I am happy to
 perform any diagnostics you can think of.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11023>
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