[GHC] #12966: GHC panics with forall and constraint

[GHC]

#12966: GHC panics with forall and constraint
-------------------------------------+-------------------------------------
        Reporter:  xcmw              |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  wontfix           |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  typecheck/T12966
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"81c49562570a403e8470f73f4decd3e0cb891983/ghc" 81c4956/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="81c49562570a403e8470f73f4decd3e0cb891983"
 testsuite: Add test for #12966

 This isn't exactly a typechecker test, but it was the most appropriate
 directory I could think of. The issue being tested is fixed.

 Test Plan: Validate

 Reviewers: austin

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2857

 GHC Trac Issues: #12966
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12966#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler