Re: #15382: heapprof001 segfaults in prof_hc_hb way on i386

#15382: heapprof001 segfaults in prof_hc_hb way on i386
-------------------------------------+-----------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.10.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:  ci-breakage
Operating System:  Unknown/Multiple  |         Architecture:  x86
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15463            |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-----------------------------------

Comment (by bgamari):

 I have also seen it fail in a similarly-looking mode on x86-64 when
 building GHC with LLVM:
 {{{
 Wrong exit code for heapprof001(prof_hc_hb)(expected 0 , actual 134 )
 Stdout ( heapprof001 ):
 a <=
 a <=
 a <=
 a <=
 a <=
 a <=
 a <=
 Stderr ( heapprof001 ):
 heapprof001: internal error: LDV_recordDead: Failed to find counter for
 closure 0x42000af050
     (GHC version 8.9.20190225 for x86_64_unknown_linux)
     Please report this as a GHC bug:
 https://www.haskell.org/ghc/reportabug
 Aborted (core dumped)
 *** unexpected failure for heapprof001(prof_hc_hb)
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15382#comment:11>