[GHC] #14880: GHC panic: updateRole

[GHC]

#14880: GHC panic: updateRole
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        Reporter:  RyanGlScott       |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler (Type    |              Version:  8.2.2
  checker)                           |
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15076            |  Differential Rev(s):  Phab:D4769
       Wiki Page:                    |
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Comment (by tdammers):

 Replying to [comment:87 simonpj]:
 > OK, so does that take us back to (3), namely the accumulator style?  Can
 you switch the style?

 I think that would just bring us back to using plain old VarSets, which we
 have already profiled.

 I could of course make a VarSet flavor that has the additional interesting
 function and in_scope checks, though I have doubts on whether it would
 reveal anything new.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14880#comment:88>
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