[GHC] #14430: lintUnfolding does not allow unfoldings to jump to enclosing join points

[GHC]

#14430: lintUnfolding does not allow unfoldings to jump to enclosing join points
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        Reporter:  nomeata           |                Owner:  nomeata
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4169
       Wiki Page:                    |
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Comment (by Joachim Breitner <mail@…>):

 In [changeset:"803ed036704aa5bab8b0f1fee407e58d82c85393/ghc"
 803ed036/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="803ed036704aa5bab8b0f1fee407e58d82c85393"
 Invoke lintUnfolding only on top-level unfoldings (#14430)

 as nested unfoldings are linted together with the top-level unfolding,
 and lintUnfolding does the wrong things for nestd unfoldings that
 mention join points.

 The easiest way of doing that was to pass a TopLevel flag through
 `tcUnfolding`, which is invoked both for top level and nested
 unfoldings.

 Differential Revision: https://phabricator.haskell.org/D4169
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14430#comment:5>
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