[GHC] #14158: (Control.Category.id @(->) >>=) causes GHC panic

[GHC]

#14158: (Control.Category.id @(->) >>=) causes GHC panic
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        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 I noticed that too. I think it's a consequence of one of my recent
 commits: I suspect
 {{{
 commit a6c448b403dbe8720178ca82100f34baedb1f47e
 Author: Simon Peyton Jones <simonpj at microsoft.com>
 Date:   Mon Aug 28 17:33:59 2017 +0100

     Small refactor of getRuntimeRep
 }}}
 If you could bisect that would save me time.

 Even if it is, I'd like to understand WHY it fixed it!  Which I don't
 right now.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14158#comment:2>
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