[GHC] #14705: ghc-iserv sometimes segfaults in profiled way

[GHC]

#14705: ghc-iserv sometimes segfaults in profiled way
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  simonmar
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.4.1
       Component:  Profiling         |              Version:  8.5
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4437
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"488d63d6899d223ef87c26c218f0cf81ac670a90/ghc"
 488d63d6/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="488d63d6899d223ef87c26c218f0cf81ac670a90"
 Fix interpreter with profiling

 This was broken by D3746 and/or D3809, but unfortunately we didn't
 notice because CI at the time wasn't building the profiling way.

 Test Plan:
 ```
 cd testsuite/test/profiling/should_run
 make WAY=ghci-ext-prof
 ```

 Reviewers: bgamari, michalt, hvr, erikd

 Subscribers: rwbarton, thomie, carter

 GHC Trac Issues: #14705

 Differential Revision: https://phabricator.haskell.org/D4437
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14705#comment:6>
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