[GHC] #14880: GHC panic: updateRole

[GHC]

#14880: GHC panic: updateRole
-------------------------------------+-------------------------------------
        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:                    |  Phab:D5141, Phab:D5147, Phab:D5150
-------------------------------------+-------------------------------------

Comment (by tdammers):

 Comparing the baseline commit `510c5f4f22` against `wip/T14880-2-step3`,
 we get (bytes allocated):

 - T5631 from 1169733648 down to 1165383416, or +0.7% down to +0.3% (vs.
 `all.T`)
 - T5321Fun from 435532680 **up** to 438838640, or +2.8% up to +3.6%
 - T12227 from 754850808 down to 744873984, or +0.4% down to -1.0%
 - T12545 from 3289709120 down to 3212031504, or +1.2% down to -1.2%
 - T12150 from 76390472 to 76394064, insignificant

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14880#comment:139>
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