[GHC] #11563: fvProv falls into a hole (instead of detecting missing type argument) (regression from -rc1 to -rc2)

[GHC]

#11563: fvProv falls into a hole (instead of detecting missing type argument)
(regression from -rc1 to -rc2)
-------------------------------------+-------------------------------------
        Reporter:  j.waldmann        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1-rc2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11520, #11516,   |  Differential Rev(s):
  #11399                             |
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"b565830dda0994d5d67617039db3310f81e831c8/ghc"
 b565830d/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="b565830dda0994d5d67617039db3310f81e831c8"
 Wrap solveEqualities in checkNoErrs

 This simple change fixes Trac #11563, #11520, #11516, #11399.
 See esp the comments in #11520.

 See Note [Fail fast on kind errors] in TcSimplify

 Merge to 8.0 branch
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11563#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler