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Status: Fixed
Owner:
Closed: Sep 10
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 1
Type: Bug



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"ShouldCreateDemoExtensionsExternalLoaderTest.MultiProfile" is flaky

Project Member Reported by chromium...@appspot.gserviceaccount.com, Sep 5

Issue description

"ShouldCreateDemoExtensionsExternalLoaderTest.MultiProfile" is flaky.

This issue was created automatically by the chromium-try-flakes app. Please find the right owner to fix the respective test/step and assign this issue to them. If the step/test is infrastructure-related, please add Infra-Troopers label and change issue status to Untriaged. When done, please remove the issue from Sheriff Bug Queue by removing the Sheriff-Chromium label.

We have detected 3 recent flakes. List of all flakes can be found at https://chromium-try-flakes.appspot.com/all_flake_occurrences?key=ahVzfmNocm9taXVtLXRyeS1mbGFrZXNyRAsSBUZsYWtlIjlTaG91bGRDcmVhdGVEZW1vRXh0ZW5zaW9uc0V4dGVybmFsTG9hZGVyVGVzdC5NdWx0aVByb2ZpbGUM.

Flaky tests should be disabled within 30 minutes unless culprit CL is found and reverted. Please see more details here: https://sites.google.com/a/chromium.org/dev/developers/tree-sheriffs/sheriffing-bug-queues#triaging-auto-filed-flakiness-bugs
 
Detected 8 new flakes for test/step "ShouldCreateDemoExtensionsExternalLoaderTest.MultiProfile". To see the actual flakes, please visit https://chromium-try-flakes.appspot.com/all_flake_occurrences?key=ahVzfmNocm9taXVtLXRyeS1mbGFrZXNyRAsSBUZsYWtlIjlTaG91bGRDcmVhdGVEZW1vRXh0ZW5zaW9uc0V4dGVybmFsTG9hZGVyVGVzdC5NdWx0aVByb2ZpbGUM. This message was posted automatically by the chromium-try-flakes app.
[ RUN      ] ShouldCreateDemoExtensionsExternalLoaderTest.MultiProfile
=================================================================
==16801==ERROR: AddressSanitizer: heap-use-after-free on address 0x60700030d8f8 at pc 0x000010434517 bp 0x7f9b86f11680 sp 0x7f9b86f11678
READ of size 8 at 0x60700030d8f8 thread T4 (TaskSchedulerFo)
    #0 0x10434516 in reset buildtools/third_party/libc++/trunk/include/memory:2631:28
    #1 0x10434516 in operator= buildtools/third_party/libc++/trunk/include/memory:2500
    #2 0x10434516 in chromeos::smb_client::SmbService::InitTempFileManager() chrome/browser/chromeos/smb_client/smb_service.cc:262
    #3 0x161fffcb in Run base/callback.h:99:12
    #4 0x161fffcb in base::(anonymous namespace)::PostTaskAndReplyRelay::RunTaskAndPostReply(base::(anonymous namespace)::PostTaskAndReplyRelay) base/threading/post_task_and_reply_impl.cc:79
    #5 0x16200d24 in Invoke<void (*)(base::(anonymous namespace)::PostTaskAndReplyRelay), base::(anonymous namespace)::PostTaskAndReplyRelay> base/bind_internal.h:416:12
    #6 0x16200d24 in MakeItSo<void (*)(base::(anonymous namespace)::PostTaskAndReplyRelay), base::(anonymous namespace)::PostTaskAndReplyRelay> base/bind_internal.h:616
    #7 0x16200d24 in RunImpl<void (*)(base::(anonymous namespace)::PostTaskAndReplyRelay), std::__1::tuple<base::(anonymous namespace)::PostTaskAndReplyRelay>, 0> base/bind_internal.h:689
    #8 0x16200d24 in base::internal::Invoker<base::internal::BindState<void (*)(base::(anonymous namespace)::PostTaskAndReplyRelay), base::(anonymous namespace)::PostTaskAndReplyRelay>, void ()>::RunOnce(base::internal::BindStateBase*) base/bind_internal.h:658
    #9 0x16316e04 in Run base/callback.h:99:12
    #10 0x16316e04 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:101
    #11 0x161e7e17 in base::internal::TaskTracker::RunOrSkipTask(base::internal::Task, base::internal::Sequence*, bool) base/task/task_scheduler/task_tracker.cc:558:23
    #12 0x162ec54f in base::internal::TaskTrackerPosix::RunOrSkipTask(base::internal::Task, base::internal::Sequence*, bool) base/task/task_scheduler/task_tracker_posix.cc:23:16
    #13 0x13d8dc93 in base::test::ScopedTaskEnvironment::TestTaskTracker::RunOrSkipTask(base::internal::Task, base::internal::Sequence*, bool) base/test/scoped_task_environment.cc:335:49
    #14 0x161e557b in base::internal::TaskTracker::RunAndPopNextTask(scoped_refptr<base::internal::Sequence>, base::internal::CanScheduleSequenceObserver*) base/task/task_scheduler/task_tracker.cc:437:3
    #15 0x1633f0bc in base::internal::SchedulerWorker::RunWorker() base/task/task_scheduler/scheduler_worker.cc:332:24
    #16 0x1633e7c7 in base::internal::SchedulerWorker::RunPooledWorker() base/task/task_scheduler/scheduler_worker.cc:224:3
    #17 0x162ee092 in base::(anonymous namespace)::ThreadFunc(void*) base/threading/platform_thread_posix.cc:76:13
    #18 0x7f9b998ce183 in start_thread /build/eglibc-ripdx6/eglibc-2.19/nptl/pthread_create.c:312

0x60700030d8f8 is located 56 bytes inside of 72-byte region [0x60700030d8c0,0x60700030d908)
freed by thread T0 here:
    #0 0x11af062 in operator delete(void*) /b/swarming/w/ir/kitchen-workdir/src/third_party/llvm/compiler-rt/lib/asan/asan_new_delete.cc:167:3
    #1 0x1bde398f in KeyedServiceFactory::Disassociate(base::SupportsUserData*) components/keyed_service/core/keyed_service_factory.cc:105:5
    #2 0x1bde3d3a in KeyedServiceFactory::ContextDestroyed(base::SupportsUserData*) components/keyed_service/core/keyed_service_factory.cc:117:3
    #3 0x1bde928a in DependencyManager::DestroyContextServices(base::SupportsUserData*) components/keyed_service/core/dependency_manager.cc:100:14
    #4 0x13d606e9 in TestingProfile::~TestingProfile() chrome/test/base/testing_profile.cc:540:40
    #5 0x13d6105d in TestingProfile::~TestingProfile() chrome/test/base/testing_profile.cc:528:35
    #6 0x7a710ee in operator() buildtools/third_party/libc++/trunk/include/memory:2321:5
    #7 0x7a710ee in reset buildtools/third_party/libc++/trunk/include/memory:2634
    #8 0x7a710ee in ~unique_ptr buildtools/third_party/libc++/trunk/include/memory:2588
    #9 0x7a710ee in chromeos::ShouldCreateDemoExtensionsExternalLoaderTest_MultiProfile_Test::TestBody() chrome/browser/chromeos/login/demo_mode/demo_extensions_external_loader_unittest.cc:532
    #10 0x8c28232 in HandleExceptionsInMethodIfSupported<testing::Test, void> third_party/googletest/src/googletest/src/gtest.cc
    #11 0x8c28232 in testing::Test::Run() third_party/googletest/src/googletest/src/gtest.cc:2522
    #12 0x8c2a3b4 in testing::TestInfo::Run() third_party/googletest/src/googletest/src/gtest.cc:2698:11
    #13 0x8c2b786 in testing::TestCase::Run() third_party/googletest/src/googletest/src/gtest.cc:2816:28
    #14 0x8c531f6 in testing::internal::UnitTestImpl::RunAllTests() third_party/googletest/src/googletest/src/gtest.cc:5182:43
    #15 0x8c52445 in HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool> third_party/googletest/src/googletest/src/gtest.cc
    #16 0x8c52445 in testing::UnitTest::Run() third_party/googletest/src/googletest/src/gtest.cc:4791
    #17 0x13d9a86a in RUN_ALL_TESTS third_party/googletest/src/googletest/include/gtest/gtest.h:2333:46
    #18 0x13d9a86a in base::TestSuite::Run() base/test/test_suite.cc:295
    #19 0x13da1eb8 in Run base/callback.h:99:12
    #20 0x13da1eb8 in base::(anonymous namespace)::LaunchUnitTestsInternal(base::OnceCallback<int ()>, unsigned long, int, bool, base::OnceCallback<void ()>) base/test/launcher/unit_test_launcher.cc:224
    #21 0x13da1960 in base::LaunchUnitTests(int, char**, base::OnceCallback<int ()>) base/test/launcher/unit_test_launcher.cc:575:10
    #22 0x13d7212e in main chrome/test/base/run_all_unittests.cc:30:10
    #23 0x7f9b950b6f44 in __libc_start_main /build/eglibc-ripdx6/eglibc-2.19/csu/libc-start.c:287

previously allocated by thread T0 here:
    #0 0x11ae422 in operator new(unsigned long) /b/swarming/w/ir/kitchen-workdir/src/third_party/llvm/compiler-rt/lib/asan/asan_new_delete.cc:106:3
    #1 0x10438ea3 in chromeos::smb_client::SmbServiceFactory::BuildServiceInstanceFor(content::BrowserContext*) const chrome/browser/chromeos/smb_client/smb_service_factory.cc:46:10
    #2 0x1ceb7317 in BrowserContextKeyedServiceFactory::BuildServiceInstanceFor(base::SupportsUserData*) const components/keyed_service/content/browser_context_keyed_service_factory.cc:98:7
    #3 0x1bde2a9b in KeyedServiceFactory::GetServiceForContext(base::SupportsUserData*, bool) components/keyed_service/core/keyed_service_factory.cc:89:15
    #4 0x1bde8b54 in DependencyManager::CreateContextServices(base::SupportsUserData*, bool) components/keyed_service/core/dependency_manager.cc
    #5 0x1ceb4b2c in BrowserContextDependencyManager::DoCreateBrowserContextServices(content::BrowserContext*, bool) components/keyed_service/content/browser_context_dependency_manager.cc:47:22
    #6 0x13d5c9ed in TestingProfile::Init() chrome/test/base/testing_profile.cc:509:40
    #7 0x13d5b9b8 in TestingProfile::TestingProfile() chrome/test/base/testing_profile.cc:271:3
    #8 0x7a709ac in make_unique<TestingProfile> buildtools/third_party/libc++/trunk/include/memory:3114:32
    #9 0x7a709ac in AddTestUser chrome/browser/chromeos/login/demo_mode/demo_extensions_external_loader_unittest.cc:464
    #10 0x7a709ac in chromeos::ShouldCreateDemoExtensionsExternalLoaderTest_MultiProfile_Test::TestBody() chrome/browser/chromeos/login/demo_mode/demo_extensions_external_loader_unittest.cc:525
    #11 0x8c28232 in HandleExceptionsInMethodIfSupported<testing::Test, void> third_party/googletest/src/googletest/src/gtest.cc
    #12 0x8c28232 in testing::Test::Run() third_party/googletest/src/googletest/src/gtest.cc:2522
    #13 0x8c2a3b4 in testing::TestInfo::Run() third_party/googletest/src/googletest/src/gtest.cc:2698:11
    #14 0x8c2b786 in testing::TestCase::Run() third_party/googletest/src/googletest/src/gtest.cc:2816:28
    #15 0x8c531f6 in testing::internal::UnitTestImpl::RunAllTests() third_party/googletest/src/googletest/src/gtest.cc:5182:43
    #16 0x8c52445 in HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool> third_party/googletest/src/googletest/src/gtest.cc
    #17 0x8c52445 in testing::UnitTest::Run() third_party/googletest/src/googletest/src/gtest.cc:4791
    #18 0x13d9a86a in RUN_ALL_TESTS third_party/googletest/src/googletest/include/gtest/gtest.h:2333:46
    #19 0x13d9a86a in base::TestSuite::Run() base/test/test_suite.cc:295
    #20 0x13da1eb8 in Run base/callback.h:99:12
    #21 0x13da1eb8 in base::(anonymous namespace)::LaunchUnitTestsInternal(base::OnceCallback<int ()>, unsigned long, int, bool, base::OnceCallback<void ()>) base/test/launcher/unit_test_launcher.cc:224
    #22 0x13da1960 in base::LaunchUnitTests(int, char**, base::OnceCallback<int ()>) base/test/launcher/unit_test_launcher.cc:575:10
    #23 0x13d7212e in main chrome/test/base/run_all_unittests.cc:30:10
    #24 0x7f9b950b6f44 in __libc_start_main /build/eglibc-ripdx6/eglibc-2.19/csu/libc-start.c:287

Thread T4 (TaskSchedulerFo) created by T0 here:
    #0 0x116a55d in __interceptor_pthread_create /b/swarming/w/ir/kitchen-workdir/src/third_party/llvm/compiler-rt/lib/asan/asan_interceptors.cc:210:3
    #1 0x162ed0af in base::(anonymous namespace)::CreateThread(unsigned long, bool, base::PlatformThread::Delegate*, base::PlatformThreadHandle*, base::ThreadPriority) base/threading/platform_thread_posix.cc:115:13
    #2 0x1633d0ec in base::internal::SchedulerWorker::Start(base::SchedulerWorkerObserver*) base/task/task_scheduler/scheduler_worker.cc:77:3
    #3 0x16345d19 in base::internal::SchedulerWorkerPoolImpl::CreateRegisterAndStartSchedulerWorkerLockRequired() base/task/task_scheduler/scheduler_worker_pool_impl.cc:898:16
    #4 0x16344e07 in base::internal::SchedulerWorkerPoolImpl::Start(base::SchedulerWorkerPoolParams const&, int, scoped_refptr<base::TaskRunner>, base::SchedulerWorkerObserver*, base::internal::SchedulerWorkerPoolImpl::WorkerEnvironment) base/task/task_scheduler/scheduler_worker_pool_impl.cc:249:9
    #5 0x161dd6d5 in base::internal::TaskSchedulerImpl::Start(base::TaskScheduler::InitParams const&, base::SchedulerWorkerObserver*) base/task/task_scheduler/task_scheduler_impl.cc:160:39
    #6 0x13d8baf7 in base::test::ScopedTaskEnvironment::ScopedTaskEnvironment(base::test::ScopedTaskEnvironment::MainThreadType, base::test::ScopedTaskEnvironment::ExecutionMode) base/test/scoped_task_environment.cc:144:33
    #7 0x140ae624 in make_unique<base::test::ScopedTaskEnvironment, base::test::ScopedTaskEnvironment::MainThreadType> buildtools/third_party/libc++/trunk/include/memory:3114:32
    #8 0x140ae624 in content::TestBrowserThreadBundle::Init() content/public/test/test_browser_thread_bundle.cc:101
    #9 0x7a767fd in chromeos::ShouldCreateDemoExtensionsExternalLoaderTest::ShouldCreateDemoExtensionsExternalLoaderTest() chrome/browser/chromeos/login/demo_mode/demo_extensions_external_loader_unittest.cc:444:3
    #10 0x7a77d7a in ShouldCreateDemoExtensionsExternalLoaderTest_MultiProfile_Test chrome/browser/chromeos/login/demo_mode/demo_extensions_external_loader_unittest.cc:519:1
    #11 0x7a77d7a in testing::internal::TestFactoryImpl<chromeos::ShouldCreateDemoExtensionsExternalLoaderTest_MultiProfile_Test>::CreateTest() third_party/googletest/src/googletest/include/gtest/internal/gtest-internal.h:472
    #12 0x8c2a2cd in HandleExceptionsInMethodIfSupported<testing::internal::TestFactoryBase, testing::Test *> third_party/googletest/src/googletest/src/gtest.cc
    #13 0x8c2a2cd in testing::TestInfo::Run() third_party/googletest/src/googletest/src/gtest.cc:2689
    #14 0x8c2b786 in testing::TestCase::Run() third_party/googletest/src/googletest/src/gtest.cc:2816:28
    #15 0x8c531f6 in testing::internal::UnitTestImpl::RunAllTests() third_party/googletest/src/googletest/src/gtest.cc:5182:43
    #16 0x8c52445 in HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool> third_party/googletest/src/googletest/src/gtest.cc
    #17 0x8c52445 in testing::UnitTest::Run() third_party/googletest/src/googletest/src/gtest.cc:4791
    #18 0x13d9a86a in RUN_ALL_TESTS third_party/googletest/src/googletest/include/gtest/gtest.h:2333:46
    #19 0x13d9a86a in base::TestSuite::Run() base/test/test_suite.cc:295
    #20 0x13da1eb8 in Run base/callback.h:99:12
    #21 0x13da1eb8 in base::(anonymous namespace)::LaunchUnitTestsInternal(base::OnceCallback<int ()>, unsigned long, int, bool, base::OnceCallback<void ()>) base/test/launcher/unit_test_launcher.cc:224
    #22 0x13da1960 in base::LaunchUnitTests(int, char**, base::OnceCallback<int ()>) base/test/launcher/unit_test_launcher.cc:575:10
    #23 0x13d7212e in main chrome/test/base/run_all_unittests.cc:30:10
    #24 0x7f9b950b6f44 in __libc_start_main /build/eglibc-ripdx6/eglibc-2.19/csu/libc-start.c:287

SUMMARY: AddressSanitizer: heap-use-after-free buildtools/third_party/libc++/trunk/include/memory:2631:28 in reset
Shadow bytes around the buggy address:
  0x0c0e80059ac0: fa fa fa fa fd fd fd fd fd fd fd fd fd fa fa fa
  0x0c0e80059ad0: fa fa fd fd fd fd fd fd fd fd fd fa fa fa fa fa
  0x0c0e80059ae0: fd fd fd fd fd fd fd fd fd fa fa fa fa fa fd fd
  0x0c0e80059af0: fd fd fd fd fd fd fd fa fa fa fa fa fd fd fd fd
  0x0c0e80059b00: fd fd fd fd fd fa fa fa fa fa fd fd fd fd fd fd
=>0x0c0e80059b10: fd fd fd fa fa fa fa fa fd fd fd fd fd fd fd[fd]
  0x0c0e80059b20: fd fa fa fa fa fa fd fd fd fd fd fd fd fd fd fa
  0x0c0e80059b30: fa fa fa fa fd fd fd fd fd fd fd fd fd fa fa fa
  0x0c0e80059b40: fa fa fd fd fd fd fd fd fd fd fd fa fa fa fa fa
  0x0c0e80059b50: fd fd fd fd fd fd fd fd fd fa fa fa fa fa 00 00
  0x0c0e80059b60: 00 00 00 00 00 00 00 fa fa fa fa fa fd fd fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
  Shadow gap:              cc
==16801==ABORTING

from https://chromium-swarm.appspot.com/task?id=3fbcdd6950c72210&refresh=10&show_raw=1
[ RUN      ] ShouldCreateDemoExtensionsExternalLoaderTest.MultiProfile
==17042==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x140f6bd3 in reset ./../../buildtools/third_party/libc++/trunk/include/memory:2633:9
    #1 0x140f6bd3 in operator= ./../../buildtools/third_party/libc++/trunk/include/memory:2500:0
    #2 0x140f6bd3 in chromeos::smb_client::SmbService::InitTempFileManager() ./../../chrome/browser/chromeos/smb_client/smb_service.cc:262:0
    #3 0x1b34b573 in Run ./../../base/callback.h:99:12
    #4 0x1b34b573 in base::(anonymous namespace)::PostTaskAndReplyRelay::RunTaskAndPostReply(base::(anonymous namespace)::PostTaskAndReplyRelay) ./../../base/threading/post_task_and_reply_impl.cc:79:0
    #5 0x1b34c206 in Invoke<void (*)(base::(anonymous namespace)::PostTaskAndReplyRelay), base::(anonymous namespace)::PostTaskAndReplyRelay> ./../../base/bind_internal.h:416:12
    #6 0x1b34c206 in MakeItSo<void (*)(base::(anonymous namespace)::PostTaskAndReplyRelay), base::(anonymous namespace)::PostTaskAndReplyRelay> ./../../base/bind_internal.h:616:0
    #7 0x1b34c206 in RunImpl<void (*)(base::(anonymous namespace)::PostTaskAndReplyRelay), std::__1::tuple<base::(anonymous namespace)::PostTaskAndReplyRelay>, 0> ./../../base/bind_internal.h:689:0
    #8 0x1b34c206 in base::internal::Invoker<base::internal::BindState<void (*)(base::(anonymous namespace)::PostTaskAndReplyRelay), base::(anonymous namespace)::PostTaskAndReplyRelay>, void ()>::RunOnce(base::internal::BindStateBase*) ./../../base/bind_internal.h:658:0
    #9 0x1b497e4f in Run ./../../base/callback.h:99:12
    #10 0x1b497e4f in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) ./../../base/debug/task_annotator.cc:101:0
    #11 0x1b31cd0e in base::internal::TaskTracker::RunOrSkipTask(base::internal::Task, base::internal::Sequence*, bool) ./../../base/task/task_scheduler/task_tracker.cc:558:23
    #12 0x1b4708f3 in base::internal::TaskTrackerPosix::RunOrSkipTask(base::internal::Task, base::internal::Sequence*, bool) ./../../base/task/task_scheduler/task_tracker_posix.cc:23:16
    #13 0x18618482 in base::test::ScopedTaskEnvironment::TestTaskTracker::RunOrSkipTask(base::internal::Task, base::internal::Sequence*, bool) ./../../base/test/scoped_task_environment.cc:335:49
    #14 0x1b319ead in base::internal::TaskTracker::RunAndPopNextTask(scoped_refptr<base::internal::Sequence>, base::internal::CanScheduleSequenceObserver*) ./../../base/task/task_scheduler/task_tracker.cc:437:3
    #15 0x1b4cd853 in base::internal::SchedulerWorker::RunWorker() ./../../base/task/task_scheduler/scheduler_worker.cc:332:24
    #16 0x1b4cce86 in base::internal::SchedulerWorker::RunPooledWorker() ./../../base/task/task_scheduler/scheduler_worker.cc:224:3
    #17 0x1b4722d7 in base::(anonymous namespace)::ThreadFunc(void*) ./../../base/threading/platform_thread_posix.cc:76:13
    #18 0x7fb1d872c183 in start_thread /build/eglibc-ripdx6/eglibc-2.19/nptl/pthread_create.c:312:0
    #19 0x7fb1d33d303c in clone /build/eglibc-ripdx6/eglibc-2.19/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:111:0

  Uninitialized value was created by a heap deallocation
    #0 0xe63a19 in operator delete(void*) /b/swarming/w/ir/kitchen-workdir/src/third_party/llvm/compiler-rt/lib/msan/msan_new_delete.cc:75:44
    #1 0x22f61e8b in KeyedServiceFactory::Disassociate(base::SupportsUserData*) ./../../components/keyed_service/core/keyed_service_factory.cc:105:5
    #2 0x22f625b3 in KeyedServiceFactory::ContextDestroyed(base::SupportsUserData*) ./../../components/keyed_service/core/keyed_service_factory.cc:117:3
    #3 0x22f6be1d in DependencyManager::DestroyContextServices(base::SupportsUserData*) ./../../components/keyed_service/core/dependency_manager.cc:100:14
    #4 0x185dedee in TestingProfile::~TestingProfile() ./../../chrome/test/base/testing_profile.cc:540:40
    #5 0x185dfb3c in TestingProfile::~TestingProfile() ./../../chrome/test/base/testing_profile.cc:528:35
    #6 0xa857161 in operator() ./../../buildtools/third_party/libc++/trunk/include/memory:2321:5
    #7 0xa857161 in reset ./../../buildtools/third_party/libc++/trunk/include/memory:2634:0
    #8 0xa857161 in ~unique_ptr ./../../buildtools/third_party/libc++/trunk/include/memory:2588:0
    #9 0xa857161 in chromeos::ShouldCreateDemoExtensionsExternalLoaderTest_MultiProfile_Test::TestBody() ./../../chrome/browser/chromeos/login/demo_mode/demo_extensions_external_loader_unittest.cc:532:0
    #10 0xc30bc82 in HandleExceptionsInMethodIfSupported<testing::Test, void> ./../../third_party/googletest/src/googletest/src/gtest.cc:0:0
    #11 0xc30bc82 in testing::Test::Run() ./../../third_party/googletest/src/googletest/src/gtest.cc:2522:0
    #12 0xc30f9d7 in testing::TestInfo::Run() ./../../third_party/googletest/src/googletest/src/gtest.cc:2698:11
    #13 0xc3114c9 in testing::TestCase::Run() ./../../third_party/googletest/src/googletest/src/gtest.cc:2816:28
    #14 0xc34a704 in testing::internal::UnitTestImpl::RunAllTests() ./../../third_party/googletest/src/googletest/src/gtest.cc:5182:43
    #15 0xc348fd7 in HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool> ./../../third_party/googletest/src/googletest/src/gtest.cc:0:0
    #16 0xc348fd7 in testing::UnitTest::Run() ./../../third_party/googletest/src/googletest/src/gtest.cc:4791:0
    #17 0x186284c0 in RUN_ALL_TESTS ./../../third_party/googletest/src/googletest/include/gtest/gtest.h:2333:46
    #18 0x186284c0 in base::TestSuite::Run() ./../../base/test/test_suite.cc:295:0
    #19 0x186309af in Run ./../../base/callback.h:99:12
    #20 0x186309af in base::(anonymous namespace)::LaunchUnitTestsInternal(base::OnceCallback<int ()>, unsigned long, int, bool, base::OnceCallback<void ()>) ./../../base/test/launcher/unit_test_launcher.cc:224:0
    #21 0x18630157 in base::LaunchUnitTests(int, char**, base::OnceCallback<int ()>) ./../../base/test/launcher/unit_test_launcher.cc:575:10
    #22 0x185f7cbd in main ./../../chrome/test/base/run_all_unittests.cc:30:10
    #23 0x7fb1d32f6f44 in __libc_start_main /build/eglibc-ripdx6/eglibc-2.19/csu/libc-start.c:287:0

SUMMARY: MemorySanitizer: use-of-uninitialized-value (/b/s/w/ir/out/Release/unit_tests+0x140f6bd3)
Exiting

From https://chromium-swarm.appspot.com/task?id=3fbcd21e1b0ff510&refresh=10&show_raw=1
Owner: baileyberro@chromium.org
Status: Fixed (was: Untriaged)
I guess this is fixed by https://chromium-review.googlesource.com/c/chromium/src/+/1208193

No flakes are visible after that CL lanbded.

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