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Assert failure: (size (xl) > 0) #76857

@BruceForstall

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@BruceForstall

Config:
coreclr Linux arm Checked no_tiered_compilation @ (Alpine.314.Arm32.Open)Ubuntu.1804.ArmArch.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.14-helix-arm32v7-20210910135806-8a6f4f3

Test: GC/Features/SustainedLowLatency/scenario/scenario.sh

https://dev.azure.com/dnceng-public/public/_build/results?buildId=46801&view=ms.vss-test-web.build-test-results-tab&runId=941472&paneView=debug&resultId=110112

   GC.Features.XUnitWrapper: [Long Running Test] 'GC/Features/SustainedLowLatency/scenario/scenario.sh', Elapsed: 00:02:18
      
      Assert failure(PID 3972 [0x00000f84], Thread: 3972 [0x0f84]): (size (xl) > 0)
          File: /__w/1/s/src/coreclr/gc/gc.cpp Line: 29053
          Image: /root/helix/work/correlation/corerun
      
      [createdump] waitpid() returned successfully (wstatus 00000000)
      /root/helix/work/workitem/e/GC/Features/SustainedLowLatency/scenario/scenario.sh: line 412:  3972 Aborted                 (core dumped) $LAUNCHER $ExePath "${CLRTestExecutionArguments[@]}"
      
      Return code:      1
      Raw output file:      /root/helix/work/workitem/uploads/Reports/GC.Features/SustainedLowLatency/scenario/scenario.output.txt
      Raw output:
      BEGIN EXECUTION
      /root/helix/work/correlation/corerun -p System.Reflection.Metadata.MetadataUpdater.IsSupported=false scenario.dll ''
       Cleaning up-------gen0: 2876, gen1: 2060; gen2: 142, heap size: 65,667,480 bytes
       Cleaning up-------gen0: 5728, gen1: 3381; gen2: 275, heap size: 70,464,980 bytes
       Cleaning up-------gen0: 8580, gen1: 4737; gen2: 414, heap size: 59,888,788 bytes
       Cleaning up-------gen0: 11421, gen1: 5748; gen2: 544, heap size: 47,673,828 bytes
       Cleaning up-------gen0: 14276, gen1: 7248; gen2: 676, heap size: 93,203,220 bytes
      [createdump] Gathering state for process 3972 corerun
      [createdump] Crashing thread 00000f84 signal 00000006
      [createdump] Writing minidump with heap to file /home/helixbot/dotnetbuild/dumps/coredump.3972.dmp
      [createdump] Written 93773824 bytes (22894 pages) to core file
      [createdump] Target process is alive
      [createdump] Dump successfully written in 2109ms
      Expected: 100
      Actual: 134
      END EXECUTION - FAILED

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    area-GC-coreclrblocking-outerloopBlocking the 'runtime-coreclr outerloop' and 'runtime-libraries-coreclr outerloop' runs

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