[GHC] #11246: Regression typechecking type synonym which includes `Any`.

[GHC]

#11246: Regression typechecking type synonym which includes `Any`.
-------------------------------------+-------------------------------------
        Reporter:  mpickering        |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Compiler (Type    |              Version:  8.0.1-rc2
  checker)                           |
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * failure:  None/Unknown => GHC rejects valid program
 * component:  Compiler => Compiler (Type checker)


@@ -1,1 +1,1 @@
- {{{
+ {{{#!hs

New description:

 {{{#!hs
 module Foo where

 import GHC.Exts

 type Key a = Any
 }}}

 produces the error message on HEAD but compiles on 7.8.3 and 7.10.1
 (thanks to Reid for testing).

 {{{
 unsafeany.hs:5:1: error:
     • The type family ‘Any’ should have no arguments, but has been given
 none
     • In the type synonym declaration for ‘Key’
 Failed, modules loaded: none.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11246#comment:8>
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