[GHC] #13838: -Wdeferred-type-errors; ghc: panic!; VoidRep; ((() -> ()) :: *) ~# (IO Any :: *)

[GHC]

#13838: -Wdeferred-type-errors; ghc: panic!; VoidRep; ((() -> ()) :: *) ~# (IO Any
:: *)
-------------------------------------+-------------------------------------
        Reporter:  harry             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13292            |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * related:   => #13292


Comment:

 Ah, this was fixed in 3c62b1d6b672e7727ea5fa56c69bf43e43d0fd8f (Gather
 constraints locally in checkMain), the fix for #13292. However, the test
 program from that commit also suffers from the strange output observed in
 comment:1.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13838#comment:2>
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