==================
WARNING: ThreadSanitizer: data race (pid=105083)
Read of size 8 at 0x7fffd878f9e8 by thread T22:
#0 dart::ObjectPtr dart::UntaggedObject::LoadPointer<dart::ObjectPtr>(dart::ObjectPtr const*) const out/ReleaseTSANX64/../../runtime/vm/raw_object.h:581:12 (dartvm+0x26ba938) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#1 dart::ObjectPtr dart::Object::LoadPointer<dart::ObjectPtr>(dart::ObjectPtr const*) const out/ReleaseTSANX64/../../runtime/vm/object.h:835:28 (dartvm+0x26ba938)
#2 dart::ObjectPool::ObjectAt(long) const out/ReleaseTSANX64/../../runtime/vm/object.h:5732:12 (dartvm+0x26ba938)
#3 dart::PoolPointerCall::Target() const out/ReleaseTSANX64/../../runtime/vm/code_patcher_x64.cc:269:26 (dartvm+0x26ba938)
#4 dart::CodePatcher::GetStaticCallTargetAt(unsigned long, dart::Code const&) out/ReleaseTSANX64/../../runtime/vm/code_patcher_x64.cc:458:15 (dartvm+0x26ba938)
#5 dart::DRT_HelperPatchStaticCall(dart::Isolate*, dart::Thread*, dart::Zone*, dart::NativeArguments) out/ReleaseTSANX64/../../runtime/vm/runtime_entry.cc:2192:7 (dartvm+0x289159c) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#6 DRT_PatchStaticCall out/ReleaseTSANX64/../../runtime/vm/runtime_entry.cc:2176:1 (dartvm+0x289159c)
#7 <null> <null> (0x7ffff618404a)
#8 StringBuffer._writeString dart:core-patch/string_buffer_patch.dart:66:5
#9 StringBuffer.write dart:core-patch/string_buffer_patch.dart:73:5
#10 testRepeat.testRepeat file:///b/s/w/ir/cache/builder/sdk/tests/corelib/string_test.dart:427:13
#11 testRepeat file:///b/s/w/ir/cache/builder/sdk/tests/corelib/string_test.dart:437:7
#12 main file:///b/s/w/ir/cache/builder/sdk/tests/corelib/string_test.dart:21:3
#13 wrapper1781.<anonymous closure> file:///b/s/w/ir/cache/builder/sdk/runtime/tests/concurrency/generated_stress_test.dart:40042:16
#14 _rootRun dart:async/zone_root.dart:35:13
#15 _rootRun dart:async/zone_root.dart:26:1
#16 _CustomZone.run dart:async/zone.dart:726:19
#17 _runZoned dart:async/zone_api.dart:166:6
#18 runZoned dart:async/zone_api.dart:92:10
#19 wrapper1781 file:///b/s/w/ir/cache/builder/sdk/runtime/tests/concurrency/generated_stress_test.dart:40040:3
#20 wrapper1781 file:///b/s/w/ir/cache/builder/sdk/runtime/tests/concurrency/generated_stress_test.dart:40038:1
#21 _Closure.call dart:core-patch/function.dart:1:1
#22 _delayEntrypointInvocation.<anonymous closure> dart:isolate-patch/isolate_patch.dart:317:17
#23 _Closure.call dart:core-patch/function.dart:1:1
#24 _RawReceivePort._handleMessage dart:isolate-patch/isolate_patch.dart:193:12
#25 dart-code-lookup-failed 00007ffff6184906
#26 dart::DartEntry::InvokeFunction(dart::Function const&, dart::Array const&) out/ReleaseTSANX64/../../runtime/vm/dart_entry.cc:41:10 (dartvm+0x26c2ddb) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#27 dart::DartLibraryCalls::HandleMessage(long, dart::Instance const&) out/ReleaseTSANX64/../../runtime/vm/dart_entry.cc:781:28 (dartvm+0x26c2ddb)
#28 dart::IsolateMessageHandler::HandleMessage(std::_d::unique_ptr<dart::Message, std::_d::default_delete<dart::Message>>) out/ReleaseTSANX64/../../runtime/vm/isolate.cc:1561:15 (dartvm+0x26fe254) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#29 dart::MessageHandler::HandleMessages(dart::MonitorLocker*, bool, bool) out/ReleaseTSANX64/../../runtime/vm/message_handler.cc:229:16 (dartvm+0x2741132) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#30 dart::MessageHandler::TaskCallback() out/ReleaseTSANX64/../../runtime/vm/message_handler.cc:443:18 (dartvm+0x27417b1) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#31 dart::MessageHandlerTask::Run() out/ReleaseTSANX64/../../runtime/vm/message_handler.cc:31:15 (dartvm+0x2741db3) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#32 dart::ThreadPool::WorkerLoop(dart::ThreadPool::Worker*) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:207:15 (dartvm+0x28f49c9) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#33 dart::ThreadPool::Worker::Main(unsigned long) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:367:9 (dartvm+0x28f4f4f) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#34 dart::ThreadStart(void*) out/ReleaseTSANX64/../../runtime/vm/os_thread_linux.cc:97:5 (dartvm+0x285a206) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
Previous atomic write of size 8 at 0x7fffd878f9e8 by thread T16:
#0 void std::_d::__cxx_atomic_store[abi:nn210000]<dart::ObjectPtr>(std::_d::__cxx_atomic_base_impl<dart::ObjectPtr>*, dart::ObjectPtr, std::_d::memory_order) out/ReleaseTSANX64/../../third_party/libcxx/include/__atomic/support/c11.h:68:3 (dartvm+0x26bb2ff) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#1 std::_d::__atomic_base<dart::ObjectPtr, false>::store[abi:nn210000](dart::ObjectPtr, std::_d::memory_order) out/ReleaseTSANX64/../../third_party/libcxx/include/__atomic/atomic.h:61:5 (dartvm+0x26bb2ff)
#2 void dart::UntaggedObject::StorePointer<dart::ObjectPtr, (std::_d::memory_order)3>(dart::ObjectPtr const*, dart::ObjectPtr) out/ReleaseTSANX64/../../runtime/vm/raw_object.h:622:11 (dartvm+0x26bb2ff)
#3 void dart::Object::StorePointer<dart::ObjectPtr, (std::_d::memory_order)3>(dart::ObjectPtr const*, dart::ObjectPtr) const out/ReleaseTSANX64/../../runtime/vm/object.h:848:21 (dartvm+0x26baaeb) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#4 void dart::ObjectPool::SetObjectAt<(std::_d::memory_order)3>(long, dart::Object const&) const out/ReleaseTSANX64/../../runtime/vm/object.h:5749:5 (dartvm+0x26baaeb)
#5 dart::PoolPointerCall::SetTarget(dart::Code const&) const out/ReleaseTSANX64/../../runtime/vm/code_patcher_x64.cc:274:18 (dartvm+0x26baaeb)
#6 dart::CodePatcher::PatchStaticCallAt(unsigned long, dart::Code const&, dart::Code const&) out/ReleaseTSANX64/../../runtime/vm/code_patcher_x64.cc:465:8 (dartvm+0x26baaeb)
#7 dart::DRT_HelperFixCallersTarget(dart::Isolate*, dart::Thread*, dart::Zone*, dart::NativeArguments) out/ReleaseTSANX64/../../runtime/vm/runtime_entry.cc:4121:3 (dartvm+0x2896879) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#8 DRT_FixCallersTarget out/ReleaseTSANX64/../../runtime/vm/runtime_entry.cc:4098:1 (dartvm+0x2896879)
#9 <null> <null> (0x7ffff618404a)
#10 StringBuffer._writeString dart:core-patch/string_buffer_patch.dart:66:5
#11 StringBuffer.write dart:core-patch/string_buffer_patch.dart:73:5
#12 testRepeat.testRepeat file:///b/s/w/ir/cache/builder/sdk/tests/corelib/string_test.dart:427:13
#13 testRepeat file:///b/s/w/ir/cache/builder/sdk/tests/corelib/string_test.dart:437:7
#14 main file:///b/s/w/ir/cache/builder/sdk/tests/corelib/string_test.dart:21:3
#15 wrapper1781.<anonymous closure> file:///b/s/w/ir/cache/builder/sdk/runtime/tests/concurrency/generated_stress_test.dart:40042:16
#16 _rootRun dart:async/zone_root.dart:35:13
#17 _rootRun dart:async/zone_root.dart:26:1
#18 _CustomZone.run dart:async/zone.dart:726:19
#19 _runZoned dart:async/zone_api.dart:166:6
#20 runZoned dart:async/zone_api.dart:92:10
#21 wrapper1781 file:///b/s/w/ir/cache/builder/sdk/runtime/tests/concurrency/generated_stress_test.dart:40040:3
#22 wrapper1781 file:///b/s/w/ir/cache/builder/sdk/runtime/tests/concurrency/generated_stress_test.dart:40038:1
#23 _Closure.call dart:core-patch/function.dart:1:1
#24 _delayEntrypointInvocation.<anonymous closure> dart:isolate-patch/isolate_patch.dart:317:17
#25 _Closure.call dart:core-patch/function.dart:1:1
#26 _RawReceivePort._handleMessage dart:isolate-patch/isolate_patch.dart:193:12
#27 dart-code-lookup-failed 00007ffff6184906
#28 dart::DartEntry::InvokeFunction(dart::Function const&, dart::Array const&) out/ReleaseTSANX64/../../runtime/vm/dart_entry.cc:41:10 (dartvm+0x26c2ddb) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#29 dart::DartLibraryCalls::HandleMessage(long, dart::Instance const&) out/ReleaseTSANX64/../../runtime/vm/dart_entry.cc:781:28 (dartvm+0x26c2ddb)
#30 dart::IsolateMessageHandler::HandleMessage(std::_d::unique_ptr<dart::Message, std::_d::default_delete<dart::Message>>) out/ReleaseTSANX64/../../runtime/vm/isolate.cc:1561:15 (dartvm+0x26fe254) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#31 dart::MessageHandler::HandleMessages(dart::MonitorLocker*, bool, bool) out/ReleaseTSANX64/../../runtime/vm/message_handler.cc:229:16 (dartvm+0x2741132) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#32 dart::MessageHandler::TaskCallback() out/ReleaseTSANX64/../../runtime/vm/message_handler.cc:443:18 (dartvm+0x27417b1) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#33 dart::MessageHandlerTask::Run() out/ReleaseTSANX64/../../runtime/vm/message_handler.cc:31:15 (dartvm+0x2741db3) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#34 dart::ThreadPool::WorkerLoop(dart::ThreadPool::Worker*) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:207:15 (dartvm+0x28f49c9) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#35 dart::ThreadPool::Worker::Main(unsigned long) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:367:9 (dartvm+0x28f4f4f) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#36 dart::ThreadStart(void*) out/ReleaseTSANX64/../../runtime/vm/os_thread_linux.cc:97:5 (dartvm+0x285a206) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
Thread T22 'DartWorker' (tid=105106, running) created by thread T21 at:
#0 pthread_create ../../../../../../../../../llvm-llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp:1078:3 (dartvm+0x227e7ba) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#1 dart::OSThread::TryStart(char const*, void (*)(unsigned long), unsigned long) out/ReleaseTSANX64/../../runtime/vm/os_thread_linux.cc:116:12 (dartvm+0x285a0c5) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#2 dart::OSThread::Start(char const*, void (*)(unsigned long), unsigned long) out/ReleaseTSANX64/../../runtime/vm/os_thread.cc:359:16 (dartvm+0x2859edf) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#3 dart::ThreadPool::Worker::StartThread() out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:337:3 (dartvm+0x28f4159) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#4 dart::ThreadPool::RunImpl(std::_d::unique_ptr<dart::ThreadPool::Task, std::_d::default_delete<dart::ThreadPool::Task>>) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:130:17 (dartvm+0x28f4159)
#5 bool dart::ThreadPool::Run<dart::MessageHandlerTask, dart::MessageHandler*>(dart::MessageHandler*&&) out/ReleaseTSANX64/../../runtime/vm/thread_pool.h:48:12 (dartvm+0x2740ba6) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#6 dart::MessageHandler::Run(dart::ThreadPool*, dart::MessageHandler::MessageStatus (*)(unsigned long), void (*)(unsigned long), unsigned long) out/ReleaseTSANX64/../../runtime/vm/message_handler.cc:111:24 (dartvm+0x2740ba6)
#7 dart::Isolate::Run() out/ReleaseTSANX64/../../runtime/vm/isolate.cc:2470:22 (dartvm+0x2701d7c) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#8 Dart_RunLoopAsync out/ReleaseTSANX64/../../runtime/vm/dart_api_impl.cc:2102:12 (dartvm+0x2c9d7b4) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#9 dart::SpawnIsolateTask::Run(dart::Isolate*) out/ReleaseTSANX64/../../runtime/lib/isolate.cc:905:10 (dartvm+0x262dafe) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#10 dart::SpawnIsolateTask::RunLightweight(char const*) out/ReleaseTSANX64/../../runtime/lib/isolate.cc:869:5 (dartvm+0x262d3f0) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#11 dart::SpawnIsolateTask::Run() out/ReleaseTSANX64/../../runtime/lib/isolate.cc:785:7 (dartvm+0x262d12a) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#12 dart::ThreadPool::WorkerLoop(dart::ThreadPool::Worker*) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:207:15 (dartvm+0x28f49c9) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#13 dart::ThreadPool::Worker::Main(unsigned long) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:367:9 (dartvm+0x28f4f4f) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#14 dart::ThreadStart(void*) out/ReleaseTSANX64/../../runtime/vm/os_thread_linux.cc:97:5 (dartvm+0x285a206) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
Thread T16 'DartWorker' (tid=105100, running) created by thread T13 at:
#0 pthread_create ../../../../../../../../../llvm-llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp:1078:3 (dartvm+0x227e7ba) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#1 dart::OSThread::TryStart(char const*, void (*)(unsigned long), unsigned long) out/ReleaseTSANX64/../../runtime/vm/os_thread_linux.cc:116:12 (dartvm+0x285a0c5) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#2 dart::OSThread::Start(char const*, void (*)(unsigned long), unsigned long) out/ReleaseTSANX64/../../runtime/vm/os_thread.cc:359:16 (dartvm+0x2859edf) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#3 dart::ThreadPool::Worker::StartThread() out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:337:3 (dartvm+0x28f4159) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#4 dart::ThreadPool::RunImpl(std::_d::unique_ptr<dart::ThreadPool::Task, std::_d::default_delete<dart::ThreadPool::Task>>) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:130:17 (dartvm+0x28f4159)
#5 bool dart::ThreadPool::Run<dart::MessageHandlerTask, dart::MessageHandler*>(dart::MessageHandler*&&) out/ReleaseTSANX64/../../runtime/vm/thread_pool.h:48:12 (dartvm+0x2740ba6) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#6 dart::MessageHandler::Run(dart::ThreadPool*, dart::MessageHandler::MessageStatus (*)(unsigned long), void (*)(unsigned long), unsigned long) out/ReleaseTSANX64/../../runtime/vm/message_handler.cc:111:24 (dartvm+0x2740ba6)
#7 dart::Isolate::Run() out/ReleaseTSANX64/../../runtime/vm/isolate.cc:2470:22 (dartvm+0x2701d7c) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#8 Dart_RunLoopAsync out/ReleaseTSANX64/../../runtime/vm/dart_api_impl.cc:2102:12 (dartvm+0x2c9d7b4) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#9 dart::SpawnIsolateTask::Run(dart::Isolate*) out/ReleaseTSANX64/../../runtime/lib/isolate.cc:905:10 (dartvm+0x262dafe) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#10 dart::SpawnIsolateTask::RunLightweight(char const*) out/ReleaseTSANX64/../../runtime/lib/isolate.cc:869:5 (dartvm+0x262d3f0) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#11 dart::SpawnIsolateTask::Run() out/ReleaseTSANX64/../../runtime/lib/isolate.cc:785:7 (dartvm+0x262d12a) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#12 dart::ThreadPool::WorkerLoop(dart::ThreadPool::Worker*) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:207:15 (dartvm+0x28f49c9) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#13 dart::ThreadPool::Worker::Main(unsigned long) out/ReleaseTSANX64/../../runtime/vm/thread_pool.cc:367:9 (dartvm+0x28f4f4f) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
#14 dart::ThreadStart(void*) out/ReleaseTSANX64/../../runtime/vm/os_thread_linux.cc:97:5 (dartvm+0x285a206) (BuildId: 784cabc0908151ec3be46ddd752f9b0828192650)
SUMMARY: ThreadSanitizer: data race out/ReleaseTSANX64/../../runtime/vm/raw_object.h:581:12 in dart::ObjectPtr dart::UntaggedObject::LoadPointer<dart::ObjectPtr>(dart::ObjectPtr const*) const
==================
Completed in 0:00:27.685178
=> Running "out/ReleaseTSANX64/dart --disable-dart-dev --profiler --sample_buffer_duration=57 --profile_period=8213 --verify_before_gc --no-profiler -Drepeat=4 -Dshard=53 -Dshards=64 runtime/tests/concurrency/generated_stress_test.dart.jit.dill" failed with -6
=> Possible crash 0 (pid: 105083)
