[GHC] #12484: Missing pattern synonym signatures gives incorrect fix

[GHC]

#12484: Missing pattern synonym signatures gives incorrect fix
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        Reporter:  alanz             |                Owner:
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11053            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"ca58946e7b3ac32785ef073e0e4daeece31dfd70/ghc"
 ca58946e/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ca58946e7b3ac32785ef073e0e4daeece31dfd70"
 Improve missing-sig warning

 Fixes Trac #12484

 (cherry picked from commit ac0e11252af149f085e2262200b7a1638b4a1553)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12484#comment:3>
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