[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 simonpj):

 Plan (c.f. comment:114)
 * Commit Step 0 (unless there is some reason not to)
 * Commit Step 1 (ditto)
 * Step 2: Phab:D5147.  Ben says there are Lint errors, which sounds
 mysterious.   He will explain how to reproduce this.
 * Step 3: still to come.

 Let's get this done!

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14880#comment:133>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler