[GHC] #14880: GHC panic: updateRole

[GHC]

#14880: GHC panic: updateRole
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       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:                    |
-------------------------------------+-------------------------------------

Comment (by tdammers):

 Could you maybe provide a quick summary of the exact performance trouble?
 I'm running some tests as we speak, but it would be easier for me if you
 could hint at some tests that produce particularly bad behavior, or maybe
 an example program on which GHC peforms badly after this patch.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14880#comment:20>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler