[GHC] #13547: Lint error in arrows program

[GHC]

#13547: Lint error in arrows program
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        Reporter:  cipher1024        |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
  (CodeGen)                          |
      Resolution:                    |             Keywords:  Arrows
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  10158             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Replying to [comment:24 simonpj]:
 > It fails with GHC 7.10 as well, so I'm not sure it ever worked...

 What do you mean? It works fine with GHC 7.10.3:

 {{{
 $ /opt/ghc/7.10.3/bin/ghc Bug.hs -fforce-recomp
 [1 of 1] Compiling Document.Phase.Proofs2 ( Bug.hs, Bug.o )

 Bug.hs:60:10: Warning:
     No explicit implementation for
       ‘id’ and ‘.’
     In the instance declaration for ‘Category LatexParserA’

 Bug.hs:61:10: Warning:
     No explicit implementation for
       ‘arr’ and ‘first’
     In the instance declaration for ‘Arrow LatexParserA’
 }}}

 Aside from some warnings, of course, which are due to minimizing the
 program down so much.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13547#comment:27>
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