[GHC] #13458: Panic with unsafeCoerce and -dcore-lint

[GHC]

#13458: Panic with unsafeCoerce and -dcore-lint
-------------------------------------+-------------------------------------
        Reporter:  dfeuer            |                Owner:  goldfire
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |             Keywords:
      Resolution:  fixed             |  LevityPolymorphism
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  crash or panic                     |  typecheck/should_compile/T13458
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

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


Comment:

 Merged comment:12 to `ghc-8.2` as
 662c64226e302009175abfa7ed196ac905990486.

 I'll look into the warnings.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13458#comment:15>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler