[GHC] #16199: GHC 8.6 bundles libraries that don't correspond to Hackage releases

[GHC]

#16199: GHC 8.6 bundles libraries that don't correspond to Hackage releases
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  highest           |            Milestone:
       Component:  libraries         |              Version:  8.6.3
  (other)                            |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14678            |  Differential Rev(s):
       Wiki Page:                    |  https://gitlab.haskell.org/ghc/ghc/merge_requests/139
-------------------------------------+-------------------------------------

Comment (by jrp):

 I don't know whether this is just regular `cabal` hell or an instance of
 this problem, but running:
 {{{
 cabal new-install parsec
 Resolving dependencies...
 cabal: Could not resolve dependencies:
 [__0] trying: ghc-8.6.3/installed-8.6... (user goal)
 [__1] next goal: process (user goal)
 [__1] rejecting: process-1.6.5.0 (conflict: ghc =>
 process==1.6.3.0/installed-1.6...)
 [__1] rejecting: process-1.6.4.0, process-1.6.3.0/installed-1.6...,
 process-1.6.3.0, process-1.6.2.0, process-1.6.1.0, process-1.6.0.0,
 process-1.5.0.0, process-1.4.3.0, process-1.4.2.0, process-1.4.1.0,
 process-1.4.0.0, process-1.3.0.0, process-1.2.3.0, process-1.2.2.0,
 process-1.2.1.0, process-1.2.0.0, process-1.1.0.2, process-1.1.0.1,
 process-1.1.0.0, process-1.0.1.5, process-1.0.1.4, process-1.0.1.3,
 process-1.0.1.2, process-1.0.1.1, process-1.0.0.0 (constraint from user
 target
 requires ==1.6.5.0)
 [__1] fail (backjumping, conflict set: ghc, process)
 After searching the rest of the dependency tree exhaustively, these were
 the
 goals I've had most trouble fulfilling: process, ghc
 }}}
 If an instance of this problem, then I'd recommend an 8.6.4...

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16199#comment:10>
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