Interop\StringMarshalling\UTF8\UTF8Test failing in outerloop #69349

  Starting:    Interop.StringMarshalling.XUnitWrapper (parallel test collections = on, max threads = 2)
    Interop/StringMarshalling/UTF8/UTF8Test/UTF8Test.sh [FAIL]
      free(): invalid pointer
      /datadisks/disk1/work/B90F09CF/w/B12609F6/e/Interop/StringMarshalling/UTF8/UTF8Test/UTF8Test.sh: line 382:  8806 Aborted                 (core dumped) $LAUNCHER $ExePath "${CLRTestExecutionArguments[@]}"
      
      Return code:      1
      Raw output file:      /datadisks/disk1/work/B90F09CF/w/B12609F6/uploads/Reports/Interop.StringMarshalling/UTF8/UTF8Test/UTF8Test.output.txt
      Raw output:
      BEGIN EXECUTION
      /datadisks/disk1/work/B90F09CF/p/corerun -p System.Reflection.Metadata.MetadataUpdater.IsSupported=false UTF8Test.dll ''
      [createdump] Gathering state for process 8806 corerun
      [createdump] Crashing thread 00002266 signal 00000006
      [createdump] Writing minidump with heap to file /home/helixbot/dotnetbuild/dumps/coredump.8806.dmp
      [createdump] Written 129400832 bytes (31592 pages) to core file
      [createdump] Dump successfully written
      Expected: 100
      Actual: 134
      END EXECUTION - FAILED
      Test Harness Exitcode is : 1
      To run the test:
      > set CORE_ROOT=/datadisks/disk1/work/B90F09CF/p
      > /datadisks/disk1/work/B90F09CF/w/B12609F6/e/Interop/StringMarshalling/UTF8/UTF8Test/UTF8Test.sh
      Expected: True
      Actual:   False
      Stack Trace:
           at Interop_StringMarshalling._UTF8_UTF8Test_UTF8Test_._UTF8_UTF8Test_UTF8Test_sh()