[GHC] #10009: type inference regression when faking injective type families

[GHC]

#10009: type inference regression when faking injective type families
-------------------------------------+-------------------------------------
        Reporter:  aavogt            |                   Owner:
            Type:  bug               |                  Status:  merge
        Priority:  highest           |               Milestone:  7.10.2
       Component:  Compiler (Type    |                 Version:  7.10.1-rc1
  checker)                           |                Keywords:
      Resolution:                    |            Architecture:
Operating System:  Unknown/Multiple  |  Unknown/Multiple
 Type of failure:  GHC rejects       |               Test Case:
  valid program                      |                Blocking:
      Blocked By:                    |  Differential Revisions:
 Related Tickets:  #10226            |
-------------------------------------+-------------------------------------
Changes (by simonpj):

 * priority:  high => highest
 * status:  new => merge


Comment:

 Let's see if Austin can merge that big patch in comment:22 to 7.10.2, if
 that does actually fix the problems you are having.

 That said, I'm not finished with this ticket.  I had to park it for a
 while, but I know that the solution is incomplete and am working on making
 it better.  Still, I think the above patch is a big improvement.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10009#comment:32>
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