[GHC] #16059: checkValidType is defeated by a type synonym

[GHC]

#16059: checkValidType is defeated by a type synonym
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler (Type    |              Version:  8.7
  checker)                           |
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC accepts       |            Test Case:
  invalid program                    |  typecheck/should_fail/T16059{a,c,d,e}
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |  https://gitlab.haskell.org/ghc/ghc/merge_requests/112
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * status:  upstream => closed
 * testcase:   => typecheck/should_fail/T16059{a,c,d,e}
 * resolution:   => fixed
 * blocking:  16140 =>
 * milestone:  8.10.1 => 8.8.1


Comment:

 Landed in
 https://gitlab.haskell.org/ghc/ghc/commit/9dc56b61ae10cb26ec8b2bc132ae6c9b620707a8.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16059#comment:17>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler