Re: [GHC] #13662: Type inference fails in connection with TypeFamilies, 'let', type equalities ...

9 May 2017

      #13662: Type inference fails in connection with TypeFamilies, 'let', type
equalities ...
-------------------------------------+-------------------------------------
        Reporter:  Lemming           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.2.1-rc1
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Simon Peyton Jones ):

 In [changeset:"43a31683acbe2f8120fbb73fe5a6fd1f5de9db80/ghc"
 43a31683/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="43a31683acbe2f8120fbb73fe5a6fd1f5de9db80"
 Reset cc_pend_sc flag in dropDerivedCt

 I'd forgotten to reset this flag to True when dropping Derived
 constraints, which led to Trac #13662.  Easily fixed.
 }}}

--
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13662#comment:2
GHC http://www.haskell.org/ghc/
The Glasgow Haskell Compiler