[GHC] #14715: GHC 8.4.1-alpha regression with PartialTypeSignatures

[GHC]

#14715: GHC 8.4.1-alpha regression with PartialTypeSignatures
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.4.1
       Component:  Compiler (Type    |              Version:  8.4.1-alpha1
  checker)                           |             Keywords:
      Resolution:                    |  PartialTypeSignatures
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 RyanGlScott):

 * cc: simonpj (added)


Comment:

 This regression was introduced in 8dc6d645fc3384b3b8ded0578939f5c855dd2ed5
 (`Re-engineer Given flatten-skolems`).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14715#comment:1>
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