[GHC] #13680: Can't use TypeApplications with [] data constructor

[GHC]

#13680: Can't use TypeApplications with [] data constructor
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |             Keywords:
      Resolution:                    |  TypeApplications
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3733
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"c9e4c861c6855e03bd14b182d2173da559e98d85/ghc"
 c9e4c861/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="c9e4c861c6855e03bd14b182d2173da559e98d85"
 Allow visible type application for []

 This amounts to a one-line change in `tcExpr`. I've added a Note to
 explain what is going on.

 This requires a separate change in the pattern-match checker to
 account for the fact that typechecked `[]` expressions become
 `ConLikeOut`s, not `ExplicitList`s.

 Test Plan: make test TEST=T13680

 Reviewers: goldfire, mpickering, austin, bgamari

 Reviewed By: mpickering, bgamari

 Subscribers: rwbarton, thomie, goldfire

 GHC Trac Issues: #13680

 Differential Revision: https://phabricator.haskell.org/D3733
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13680#comment:14>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler