[GHC] #10769: Yet another crash from typed holes

[GHC]

#10769: Yet another crash from typed holes
-------------------------------+-----------------------------------------
        Reporter:  rpglover64  |                   Owner:
            Type:  bug         |                  Status:  new
        Priority:  normal      |               Milestone:  7.10.3
       Component:  Compiler    |                 Version:  7.10.2
      Resolution:              |                Keywords:
Operating System:  Linux       |            Architecture:  x86_64 (amd64)
 Type of failure:  GHCi crash  |               Test Case:
      Blocked By:              |                Blocking:
 Related Tickets:              |  Differential Revisions:
-------------------------------+-----------------------------------------

Comment (by rpglover64):

 Interestingly, also passing `-fdefer-type-errors` makes ghc 7.10.2 both
 warn about "No instance for Functor" and run successfully.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10769#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler