--- Command "vm" (took 01.000158s):
DART_CONFIGURATION=ReleaseTSANARM64 xcodebuild/ReleaseTSANARM64/dart --profiler --scavenger_tasks=-1 -Dtest_runner.configuration=vm-tsan-mac-release-arm64 --ignore-unrecognized-flags --packages=/Volumes/Work/s/w/ir/.dart_tool/package_config.json /Volumes/Work/s/w/ir/runtime/tests/vm/dart/gc/splay_test.dart

exit code:
-6

stderr:
==================
WARNING: ThreadSanitizer: data race (pid=16029)
  Write of size 8 at 0x00010d3046a8 by main thread:
    #0 dart::Thread::ExitIsolate(bool) <null> (dartvm:arm64+0x10054ffec)
    #1 dart::Dart::DartInit(Dart_InitializeParams const*) <null> (dartvm:arm64+0x10035c23c)
    #2 dart::Dart::Init(Dart_InitializeParams const*) <null> (dartvm:arm64+0x10035c334)
    #3 Dart_Initialize <null> (dartvm:arm64+0x1008a1a34)
    #4 dart::bin::main(int, char**) <null> (dartvm:arm64+0x1000051e8)
    #5 main <null> (dartvm:arm64+0x100004084)

  Previous read of size 8 at 0x00010d3046a8 by thread T2 (mutexes: write M0):
    #0 dart::Thread::IsExecutingDartCode() const <null> (dartvm:arm64+0x100552214)
    #1 dart::Profiler::SampleThread(dart::Thread*, dart::InterruptedThreadState const&) <null> (dartvm:arm64+0x1004d6f28)
    #2 dart::ThreadInterrupter::InterruptThread(dart::OSThread*) <null> (dartvm:arm64+0x100556424)
    #3 dart::ThreadInterrupter::ThreadMain(unsigned long) <null> (dartvm:arm64+0x100555f64)
    #4 dart::ThreadStart(void*) <null> (dartvm:arm64+0x1004d01bc)

  Location is heap block of size 3856 at 0x00010d304000 allocated by main thread:
    #0 operator new(unsigned long) <null> (libclang_rt.tsan_osx_dynamic.dylib:arm64+0x8e814)
    #1 dart::ThreadRegistry::GetFreeThreadLocked(bool) <null> (dartvm:arm64+0x100557c04)
    #2 dart::Thread::AddActiveThread(dart::IsolateGroup*, dart::Isolate*, dart::Thread::TaskKind, bool) <null> (dartvm:arm64+0x10054fb18)
    #3 dart::Thread::EnterIsolate(dart::Isolate*) <null> (dartvm:arm64+0x10054f834)
    #4 dart::Isolate::InitIsolate(char const*, dart::IsolateGroup*, Dart_IsolateFlags const&, bool) <null> (dartvm:arm64+0x100394ccc)
    #5 dart::Dart::DartInit(Dart_InitializeParams const*) <null> (dartvm:arm64+0x10035be4c)
    #6 dart::Dart::Init(Dart_InitializeParams const*) <null> (dartvm:arm64+0x10035c334)
    #7 Dart_Initialize <null> (dartvm:arm64+0x1008a1a34)
    #8 dart::bin::main(int, char**) <null> (dartvm:arm64+0x1000051e8)
    #9 main <null> (dartvm:arm64+0x100004084)

  Mutex M0 (0x00010cd00eb0) created at:
    #0 pthread_mutex_init <null> (libclang_rt.tsan_osx_dynamic.dylib:arm64+0x327ac)
    #1 dart::Mutex::Mutex() <null> (dartvm:arm64+0x10000c054)
    #2 dart::Mutex::Mutex() <null> (dartvm:arm64+0x10000c1e4)
    #3 dart::OSThread::Init() <null> (dartvm:arm64+0x1004cf994)
    #4 dart::Dart::DartInit(Dart_InitializeParams const*) <null> (dartvm:arm64+0x10035bb68)
    #5 dart::Dart::Init(Dart_InitializeParams const*) <null> (dartvm:arm64+0x10035c334)
    #6 Dart_Initialize <null> (dartvm:arm64+0x1008a1a34)
    #7 dart::bin::main(int, char**) <null> (dartvm:arm64+0x1000051e8)
    #8 main <null> (dartvm:arm64+0x100004084)

  Thread T2 (tid=187240, running) created by main thread at:
    #0 pthread_create <null> (libclang_rt.tsan_osx_dynamic.dylib:arm64+0x30e34)
    #1 dart::OSThread::TryStart(char const*, void (*)(unsigned long), unsigned long) <null> (dartvm:arm64+0x1004d007c)
    #2 dart::OSThread::Start(char const*, void (*)(unsigned long), unsigned long) <null> (dartvm:arm64+0x1004cfeb8)
    #3 dart::ThreadInterrupter::Startup() <null> (dartvm:arm64+0x100555c44)
    #4 dart::Profiler::Init() <null> (dartvm:arm64+0x1004d553c)
    #5 dart::Dart::DartInit(Dart_InitializeParams const*) <null> (dartvm:arm64+0x10035c230)
    #6 dart::Dart::Init(Dart_InitializeParams const*) <null> (dartvm:arm64+0x10035c334)
    #7 Dart_Initialize <null> (dartvm:arm64+0x1008a1a34)
    #8 dart::bin::main(int, char**) <null> (dartvm:arm64+0x1000051e8)
    #9 main <null> (dartvm:arm64+0x100004084)

SUMMARY: ThreadSanitizer: data race (/Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/dartvm:arm64+0x10054ffec) in dart::Thread::ExitIsolate(bool)
==================

--- Re-run this test:
python3 tools/test.py -n vm-tsan-mac-release-arm64 vm/dart/gc/splay_test/9