[GHC] #10489: Panic in TcEvidence due to wrong role

[GHC]

#10489: Panic in TcEvidence due to wrong role
-------------------------------------+-------------------------------------
        Reporter:  goldfire          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  highest           |               Milestone:
       Component:  Compiler          |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------

Comment (by Richard Eisenberg <eir@…>):

 In [changeset:"61b96a86c5342fb1c850361177d60fe855d948f6/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="61b96a86c5342fb1c850361177d60fe855d948f6"
 Fix #10489

 Dang, roles are annoying.

 Test case: typecheck/should_compile/T10489
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10489#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler