[Hackage] #844: Cabal reports "cabal: internal error: the package contains a library but there is no corresponding configuration data" when there exists no library in the cabal file

[Hackage]

#844: Cabal reports "cabal: internal error: the package contains a library but
there is no corresponding configuration data" when there exists no library
in the cabal file
----------------------------+-----------------------------------------------
  Reporter:  fushunpoon     |        Owner:                 
      Type:  defect         |       Status:  closed         
  Priority:  low            |    Milestone:                 
 Component:  Cabal library  |      Version:  1.8.0.6        
  Severity:  minor          |   Resolution:  fixed          
  Keywords:                 |   Difficulty:  easy (<4 hours)
Ghcversion:                 |     Platform:  Mac OS         
----------------------------+-----------------------------------------------
Changes (by duncan):

  * status:  new => closed
  * resolution:  => fixed


Comment:

 Yes, your analysis is correct (I just discovered the same thing).

 So the bug in cabal is that it merges the buildinfo with the
 packagedescription incorrectly and that it does not do any sanity check of
 that buildinfo.

 As you discovered, the solution for you is to generate buildinfo for the
 executable rather than the library. The structure of the buildinfo file is
 documented in the user guide:
 http://haskell.org/cabal/users-guide/authors.html#system-dependent

 Bug fixed with this patch:
 {{{
 Wed May 18 13:33:31 BST 2011  Duncan Coutts <duncan at community.haskell.org>
   * Do a sanity check on the HookedBuildInfo
   Fixes ticket #844. Previously the function that merged the
 HookedBuildInfo
   into the PackageDescription would add a library section even if none
   previously existed.

   Now we generate an error message if the HookedBuildInfo contains info
   for non-existant components (libs/exes), e.g:

   Setup: The buildinfo contains info for a library, but the package does
 not
   have a library.
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/844#comment:3>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects