[GHC] #14149: Tyepchecker generates top-level unboxed coercion

[GHC]

#14149: Tyepchecker generates top-level unboxed coercion
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      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:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"a211dca8236fb8c7ec632278f761121beeac1438/ghc"
 a211dca8/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="a211dca8236fb8c7ec632278f761121beeac1438"
 Fix defer-out-of-scope-variables

 In the hacky code in TcUnify.buildImplication we'd failed to account
 for -fdefer-out-of-scope-variables.  See the new function
 TcUnify.implicationNeeded.

 Fixes Trac #14149
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14149#comment:3>
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