[GHC] #11716: Make TypeInType stress test work

[GHC]

#11716: Make TypeInType stress test work
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        Reporter:  goldfire          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Richard Eisenberg <eir@…>):

 In [changeset:"3fe87aa00ac05f1abea22ea58d51ecc1e3073d19/ghc"
 3fe87aa0/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="3fe87aa00ac05f1abea22ea58d51ecc1e3073d19"
 Fix #11716.

 There were several smallish bugs here:
  - We had too small an InScopeSet when rejigging GADT return types.
  - When adding the extra_tvs with a datatype kind signature, we
    were sometimes changing Uniques of an explicitly bound kind var.
  - Using coercionKind in the flattener got the wrong visibility
    for a binder. Now we just zonk to get what we need.

 Test case: dependent/should_compile/RaeJobTalk
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11716#comment:1>
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