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

[GHC]

#10009: type inference regression when faking injective type families
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        Reporter:  aavogt            |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  high              |               Milestone:  7.10.1
       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:                    |
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Comment (by simonpj):

 Rats.  I wish you'd highlighted this earlier.  We've been advertising
 7.10.1 for ages, with a clearly stated list of priorities on the
 [https://ghc.haskell.org/trac/ghc/wiki/Status/GHC-7.10.1 7.10.1 status
 page].  It says that we'll only fix "highest" priority bugs.  If you care
 deeply about things, it's a good idea to monitor the status page and bid
 to have it promoted to "highest".

 I'm not sure how to proceed now. I don't know how hard it is to fix.  I
 don't know how mission-critical it is to how many people.  More info on
 the latter would be helpful.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10009#comment:11>
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