[GHC] #11746: I encountered an: internal error: evacuate: strange closure type 803645000

[GHC]

#11746: I encountered an: internal error: evacuate: strange closure type 803645000
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        Reporter:  hkBst       |                Owner:
            Type:  bug         |               Status:  closed
        Priority:  high        |            Milestone:  8.0.1
       Component:  Compiler    |              Version:  7.10.3
      Resolution:  duplicate   |             Keywords:
Operating System:  Linux       |         Architecture:  x86_64 (amd64)
 Type of failure:  GHCi crash  |            Test Case:
      Blocked By:              |             Blocking:
 Related Tickets:  #11108      |  Differential Rev(s):
       Wiki Page:              |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"9363f04d0ff22f3d898af35bb5432c4287e6dc9a/ghc" 9363f04/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="9363f04d0ff22f3d898af35bb5432c4287e6dc9a"
 Handle promotion failures when scavenging a WEAK (#11108)

 Previously, we ignored promotion failures when evacuating fields of
 a WEAK object. When a failure happens, this resulted in an WEAK object
 pointing to another object in a younger generation, causing crashes.

 I used the test case from #11746 to check that the fix is working.
 However I haven't managed to produce a test case that quickly reproduces
 the issue.

 Test Plan: ./validate

 Reviewers: austin, bgamari, simonmar

 Reviewed By: simonmar

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2189

 GHC Trac Issues: #11108
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11746#comment:7>
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