[GHC] #14884: Type holes cause assertion failure in ghc-stage2 compiler during type checking

[GHC]

#14884: Type holes cause assertion failure in ghc-stage2 compiler during type
checking
-------------------------------------+-------------------------------------
        Reporter:  sighingnow        |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:
  checker)                           |
      Resolution:                    |             Keywords:  TypedHoles
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 I somewhat doubt it.. the calls to the constraint solver from
 `TcErrors.validSubstitutions` are wonky.  I discussed this with Mathias,
 and he is on the case.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14884#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler