[GHC] #15142: GHC HEAD regression: tcTyVarDetails

[GHC]

#15142: GHC HEAD regression: tcTyVarDetails
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        Reporter:  RyanGlScott       |                Owner:  goldfire
            Type:  bug               |               Status:  merge
        Priority:  highest           |            Milestone:  8.6.1
       Component:  Compiler (Type    |              Version:  8.5
  checker)                           |             Keywords:  TypeInType,
      Resolution:                    |  TypeFamilies, CUSKs
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:  indexed-
  crash or panic                     |  types/should_compile/T15142
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 The rules are in the
 [https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/glasgow_exts.html
 #complete-user-supplied-kind-signatures-and-polymorphic-recursion manual].
 There is also `Note [Complete user-supplied kind signatures]`, but I see
 now that it's a bit out of date. To avoid duplication, I'll just have the
 Note point to the manual.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15142#comment:18>
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