[GHC] #15186: ghc 8.4.2 panic in profiling build

[GHC]

#15186: ghc 8.4.2 panic in profiling build
-------------------------------------+-------------------------------------
        Reporter:  kquick            |                Owner:  bgamari
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Profiling         |              Version:  8.4.2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash or panic                     |            Test Case:  T15186
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4755,
       Wiki Page:                    |  Phab:D4757
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"c983a1dbc01bb6ee68f67af5c7d662bc70845f6f/ghc" c983a1d/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="c983a1dbc01bb6ee68f67af5c7d662bc70845f6f"
 testsuite: Add test for #15186

 Summary: Currently broken.

 Test Plan: Validate

 Subscribers: rwbarton, thomie, carter

 GHC Trac Issues: #15186

 Differential Revision: https://phabricator.haskell.org/D4757
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15186#comment:9>
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