[GHC] #14763: GHC 8.4.1-alpha regression with FunctionalDependencies

[GHC]

#14763: GHC 8.4.1-alpha regression with FunctionalDependencies
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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-alpha3
  checker)                           |
      Resolution:                    |             Keywords:  FunDeps
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 f20cf982f126aea968ed6a482551550ffb6650cf
 (`Remove wc_insol from WantedConstraints`).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14763#comment:2>
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