[GHC] #15138: Unable to instantiate data members of kind Nat in backpack signatures.

[GHC]

#15138: Unable to instantiate data members of kind Nat in backpack signatures.
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        Reporter:  ppk               |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.4.1
      Resolution:  fixed             |             Keywords:  backpack
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4951
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"7d771987c2766bfedc92f5183d6fd571ab508a0e/ghc"
 7d771987/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="7d771987c2766bfedc92f5183d6fd571ab508a0e"
 Support typechecking of type literals in backpack

 Backpack is unable to type check signatures that expect a data which
 is a type level literal. This was reported in issue #15138. These
 commits are a fix for this. It also includes a minimal test case that
 was mentioned in the issue.

 Reviewers: bgamari, ezyang, goldfire

 Reviewed By: bgamari, ezyang

 Subscribers: simonpj, ezyang, rwbarton, thomie, carter

 GHC Trac Issues: #15138

 Differential Revision: https://phabricator.haskell.org/D4951
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15138#comment:10>
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