[GHC] #15290: QuantifiedConstraints: panic "addTcEvBind NoEvBindsVar"

[GHC]

#15290: QuantifiedConstraints: panic "addTcEvBind NoEvBindsVar"
-------------------------------------+-------------------------------------
        Reporter:  goldfire          |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
                                     |  QuantifiedConstraints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:  quantified-
                                     |  constraints/T15290, T15290a
      Blocked By:                    |             Blocking:  9123
 Related Tickets:                    |  Differential Rev(s):  Phab:D4895
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 As comment:63 says (on #9123) I don't think we should ever infer
 quantified constraints, regardless of this ticket. So I'm fine with
 closing #9123

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15290#comment:34>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler