[GHC] #9889: Pattern synonym does not work in top-level pattern bind

[GHC]

#9889: Pattern synonym does not work in top-level pattern bind
-------------------------------------+-------------------------------------
        Reporter:  goldfire          |                   Owner:  cactus
            Type:  bug               |                  Status:  patch
        Priority:  normal            |               Milestone:
       Component:  Compiler (Type    |                 Version:  7.9
  checker)                           |                Keywords:
      Resolution:                    |  PatternSynonyms
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+-------------------------------------

Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"5830fc449af6b2c0ef5be409fd3457114ae938ca/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="5830fc449af6b2c0ef5be409fd3457114ae938ca"
 Pattern synonym names need to be in scope before renaming bindings (#9889)

 I did a bit of refactoring at the same time, needless to say
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9889#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler