[GHC] #11232: Panic whilst compiling syb due to OptCoercion

[GHC]

#11232: Panic whilst compiling syb due to OptCoercion
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        Reporter:  mpickering        |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1645
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"cab131624ad0cdd54e2f3a70f93c1bd574ccf102/ghc"
 cab13162/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="cab131624ad0cdd54e2f3a70f93c1bd574ccf102"
 Fix #11232.

 I somehow forgot to propagate roles into UnivCos. Very
 simple fix, happily.

 Test Plan: simplCore/should_compile/T11232

 Reviewers: bgamari, austin, simonpj

 Reviewed By: simonpj

 Subscribers: simonpj, thomie

 Differential Revision: https://phabricator.haskell.org/D1645

 GHC Trac Issues: #11232
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11232#comment:3>
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