[GHC] #13140: Handle subtyping relation for roles in Backpack

[GHC]

#13140: Handle subtyping relation for roles in Backpack
-------------------------------------+-------------------------------------
        Reporter:  ezyang            |                Owner:  ezyang
            Type:  feature request   |               Status:  closed
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |             Keywords:  backpack hs-
      Resolution:  fixed             |  boot
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3123
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by ezyang):

 * status:  patch => closed
 * resolution:   => fixed


Comment:

 I'm marking this ticket as fixed but I'll open another ticket about role
 ranges.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13140#comment:15>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler