This test fails sometimes on LSan bots, and it seems that it detects some real leaks:

ERROR: LeakSanitizer: detected memory leaks
Direct leak of 258975 byte(s) in 22 object(s) allocated from:
    #0 0x97d653 in __interceptor_malloc /b/build/slave/linux_upload_clang/build/src/third_party/llvm/compiler-rt/lib/asan/asan_malloc_linux.cc:88:3
    #1 0x19be0bc8 in PartitionAllocGenericFlags base/allocator/partition_allocator/partition_alloc.h:946:18
    #2 0x19be0bc8 in Alloc base/allocator/partition_allocator/partition_alloc.h:966
    #3 0x19be0bc8 in BufferMalloc third_party/WebKit/Source/platform/wtf/allocator/Partitions.h:109
    #4 0x19be0bc8 in WTF::StringImpl::CreateUninitialized(unsigned int, unsigned char*&) third_party/WebKit/Source/platform/wtf/text/StringImpl.cpp:118
    #5 0x19c39227 in CreateUninitialized third_party/WebKit/Source/platform/wtf/text/WTFString.h:345:12
    #6 0x19c39227 in WTF::String::Make8BitFrom16BitSource(unsigned short const*, unsigned long) third_party/WebKit/Source/platform/wtf/text/WTFString.cpp:713
    #7 0x1c177108 in blink::AttemptStaticStringCreation(unsigned short const*, unsigned long, blink::CharacterWidth) third_party/WebKit/Source/core/html/parser/HTMLParserIdioms.cpp:459:14
    #8 0x1c2efd49 in blink::CompactHTMLToken::CompactHTMLToken(blink::HTMLToken const*, WTF::TextPosition const&) third_party/WebKit/Source/core/html/parser/HTMLParserIdioms.h:132:10
    #9 0x1c2e19bb in blink::BackgroundHTMLParser::PumpTokenizer() third_party/WebKit/Source/core/html/parser/BackgroundHTMLParser.cpp:257:24
    #10 0x1c2e0e8a in blink::BackgroundHTMLParser::UpdateDocument(WTF::String const&) third_party/WebKit/Source/core/html/parser/BackgroundHTMLParser.cpp:148:3
    #11 0x1c2e0a93 in blink::BackgroundHTMLParser::AppendRawBytesFromMainThread(std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > >) third_party/WebKit/Source/core/html/parser/BackgroundHTMLParser.cpp:142:3
    #12 0x1c170eb5 in void base::internal::FunctorTraits<void (blink::BackgroundHTMLParser::*)(std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > >), void>::Invoke<base::WeakPtr<blink::BackgroundHTMLParser>, std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > > >(void (blink::BackgroundHTMLParser::*)(std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > >), base::WeakPtr<blink::BackgroundHTMLParser>&&, std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > >&&) base/bind_internal.h:211:12
    #13 0x1c170952 in MakeItSo<void (blink::BackgroundHTMLParser::*)(std::__1::unique_ptr<WTF::Vector<char, 0, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0, WTF::PartitionAllocator> > >), base::WeakPtr<blink::BackgroundHTMLParser>, std::__1::unique_ptr<WTF::Vector<char, 0, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0, WTF::PartitionAllocator> > > > base/bind_internal.h:314:5
    #14 0x1c170952 in void base::internal::Invoker<base::internal::BindState<void (blink::BackgroundHTMLParser::*)(std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > >), base::WeakPtr<blink::BackgroundHTMLParser>, WTF::PassedWrapper<std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > > > >, void ()>::RunImpl<void (blink::BackgroundHTMLParser::*)(std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > >), std::__1::tuple<base::WeakPtr<blink::BackgroundHTMLParser>, WTF::PassedWrapper<std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > > > >, 0ul, 1ul>(void (blink::BackgroundHTMLParser::*&&)(std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > >), std::__1::tuple<base::WeakPtr<blink::BackgroundHTMLParser>, WTF::PassedWrapper<std::__1::unique_ptr<WTF::Vector<char, 0ul, WTF::PartitionAllocator>, std::__1::default_delete<WTF::Vector<char, 0ul, WTF::PartitionAllocator> > > > >&&, std::__1::integer_sequence<unsigned long, 0ul, 1ul>) base/bind_internal.h:368
    #15 0xd309cf0 in Run base/callback.h:65:12
    #16 0xd309cf0 in RunInternal third_party/WebKit/Source/platform/wtf/Functional.h:258
    #17 0xd309cf0 in WTF::ThreadCheckingCallbackWrapper<base::OnceCallback<void ()>, void ()>::Run() third_party/WebKit/Source/platform/wtf/Functional.h:245
    #18 0xdc8b6f2 in Run base/callback.h:65:12
    #19 0xdc8b6f2 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:55
    #20 0xd430ded in blink::scheduler::TaskQueueManager::ProcessTaskFromWorkQueue(blink::scheduler::internal::WorkQueue*, blink::scheduler::LazyNow, base::TimeTicks*) third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc:543:21
    #21 0xd42efc6 in blink::scheduler::TaskQueueManager::DoWork(blink::scheduler::internal::Sequence::WorkType) third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc:343:13
    #22 0xd44011e in Invoke<const base::WeakPtr<blink::scheduler::TaskQueueManager> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:211:12
    #23 0xd44011e in MakeItSo<void (blink::scheduler::TaskQueueManager::*const &)(blink::scheduler::internal::Sequence::WorkType), const base::WeakPtr<blink::scheduler::TaskQueueManager> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:314
    #24 0xd44011e in RunImpl<void (blink::scheduler::TaskQueueManager::*const &)(blink::scheduler::internal::Sequence::WorkType), const std::__1::tuple<base::WeakPtr<blink::scheduler::TaskQueueManager>, blink::scheduler::internal::Sequence::WorkType> &, 0, 1> base/bind_internal.h:368
    #25 0xd44011e in base::internal::Invoker<base::internal::BindState<void (blink::scheduler::TaskQueueManager::*)(blink::scheduler::internal::Sequence::WorkType), base::WeakPtr<blink::scheduler::TaskQueueManager>, blink::scheduler::internal::Sequence::WorkType>, void ()>::Run(base::internal::BindStateBase*) base/bind_internal.h:350
    #26 0xdc8b6f2 in Run base/callback.h:65:12
    #27 0xdc8b6f2 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:55
    #28 0xd445dc6 in blink::scheduler::internal::ThreadControllerImpl::DoWork(blink::scheduler::internal::Sequence::WorkType) third_party/WebKit/Source/platform/scheduler/base/thread_controller_impl.cc:99:19
    #29 0xd44827e in Invoke<const base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:211:12
    #30 0xd44827e in MakeItSo<void (blink::scheduler::internal::ThreadControllerImpl::*const &)(blink::scheduler::internal::Sequence::WorkType), const base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:314
    #31 0xd44827e in RunImpl<void (blink::scheduler::internal::ThreadControllerImpl::*const &)(blink::scheduler::internal::Sequence::WorkType), const std::__1::tuple<base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl>, blink::scheduler::internal::Sequence::WorkType> &, 0, 1> base/bind_internal.h:368
    #32 0xd44827e in base::internal::Invoker<base::internal::BindState<void (blink::scheduler::internal::ThreadControllerImpl::*)(blink::scheduler::internal::Sequence::WorkType), base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl>, blink::scheduler::internal::Sequence::WorkType>, void ()>::Run(base::internal::BindStateBase*) base/bind_internal.h:350
    #33 0xdc8b6f2 in Run base/callback.h:65:12
    #34 0xdc8b6f2 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:55
    #35 0xdf16f50 in base::internal::IncomingTaskQueue::RunTask(base::PendingTask*) base/message_loop/incoming_task_queue.cc:124:19
    #36 0xdd04b0c in base::MessageLoop::RunTask(base::PendingTask*) base/message_loop/message_loop.cc:399:25
    #37 0xdd056d8 in base::MessageLoop::DeferOrRunPendingTask(base::PendingTask) base/message_loop/message_loop.cc:411:5
    #38 0xdd06030 in base::MessageLoop::DoWork() base/message_loop/message_loop.cc:455:16
    #39 0xdd0ad82 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) base/message_loop/message_pump_default.cc:37:31
    #40 0xdd034d7 in base::MessageLoop::Run(bool) base/message_loop/message_loop.cc:350:12
    #41 0xdda283d in base::RunLoop::Run() base/run_loop.cc:130:14
    #42 0x1f9ccf5d in content::RendererMain(content::MainFunctionParams const&) content/renderer/renderer_main.cc:218:23
    #43 0xd9c98cd in content::RunZygote(content::MainFunctionParams const&, content::ContentMainDelegate*) content/app/content_main_runner.cc:350:14
    #44 0xd9cae53 in content::RunNamedProcessTypeMain(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, content::MainFunctionParams const&, content::ContentMainDelegate*) content/app/content_main_runner.cc:430:12
    #45 0xd9cdd73 in content::ContentMainRunnerImpl::Run() content/app/content_main_runner.cc:712:12
Direct leak of 6880 byte(s) in 307 object(s) allocated from:
    #0 0x97d653 in __interceptor_malloc /b/build/slave/linux_upload_clang/build/src/third_party/llvm/compiler-rt/lib/asan/asan_malloc_linux.cc:88:3
    #1 0x19ba2350 in PartitionAllocGenericFlags base/allocator/partition_allocator/partition_alloc.h:946:18
    #2 0x19ba2350 in Alloc base/allocator/partition_allocator/partition_alloc.h:966
    #3 0x19ba2350 in BufferMalloc third_party/WebKit/Source/platform/wtf/allocator/Partitions.h:109
    #4 0x19ba2350 in WTF::PartitionAllocator::AllocateBacking(unsigned long, char const*) third_party/WebKit/Source/platform/wtf/allocator/PartitionAllocator.cpp:13
    #5 0x1b58b649 in AllocateVectorBacking<blink::Attribute> third_party/WebKit/Source/platform/wtf/allocator/PartitionAllocator.h:43:9
    #6 0x1b58b649 in WTF::VectorBufferBase<blink::Attribute, false, WTF::PartitionAllocator>::AllocateBuffer(unsigned long) third_party/WebKit/Source/platform/wtf/Vector.h:401
    #7 0x1c2a4c98 in VectorBuffer third_party/WebKit/Source/platform/wtf/Vector.h:496:7
    #8 0x1c2a4c98 in WTF::Vector<blink::Attribute, 0ul, WTF::PartitionAllocator>::Vector(WTF::Vector<blink::Attribute, 0ul, WTF::PartitionAllocator> const&) third_party/WebKit/Source/platform/wtf/Vector.h:1397
    #9 0x1c30a820 in blink::HTMLStackItem::HTMLStackItem(blink::ContainerNode*, blink::AtomicHTMLToken*, WTF::AtomicString const&) third_party/WebKit/Source/core/html/parser/HTMLStackItem.h:204:9
    #10 0x1c304fd4 in Create third_party/WebKit/Source/core/html/parser/HTMLStackItem.h:54:16
    #11 0x1c304fd4 in blink::HTMLConstructionSite::InsertHTMLElement(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp:695
    #12 0x1c26c9ea in blink::HTMLTreeBuilder::ProcessStartTagForInBody(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp
    #13 0x1c253f80 in blink::HTMLTreeBuilder::ProcessStartTag(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp
    #14 0x1c244d63 in blink::HTMLTreeBuilder::ProcessToken(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp:356:7
    #15 0x1c23ccec in blink::HTMLTreeBuilder::ConstructTree(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp:313:5
    #16 0x1c14d22d in ConstructTreeFromCompactHTMLToken third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp:747:18
    #17 0x1c14d22d in blink::HTMLDocumentParser::ProcessTokenizedChunkFromBackgroundParser(std::__1::unique_ptr<blink::HTMLDocumentParser::TokenizedChunk, std::__1::default_delete<blink::HTMLDocumentParser::TokenizedChunk> >) third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp:534
    #18 0x1c14591a in blink::HTMLDocumentParser::PumpPendingSpeculations() third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp:608:9
    #19 0x1c144b05 in blink::HTMLDocumentParser::ResumeParsingAfterYield() third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp:274:3
    #20 0xd309cf0 in Run base/callback.h:65:12
    #21 0xd309cf0 in RunInternal third_party/WebKit/Source/platform/wtf/Functional.h:258
    #22 0xd309cf0 in WTF::ThreadCheckingCallbackWrapper<base::OnceCallback<void ()>, void ()>::Run() third_party/WebKit/Source/platform/wtf/Functional.h:245
    #23 0x1a66c9ba in Run base/callback.h:65:12
    #24 0x1a66c9ba in blink::TaskHandle::Runner::Run(blink::TaskHandle const&) third_party/WebKit/Source/platform/WebTaskRunner.cpp:75
    #25 0x1a66db69 in Invoke<base::WeakPtr<blink::TaskHandle::Runner>, blink::TaskHandle> base/bind_internal.h:211:12
    #26 0x1a66db69 in MakeItSo<void (blink::TaskHandle::Runner::*)(const blink::TaskHandle &), base::WeakPtr<blink::TaskHandle::Runner>, blink::TaskHandle> base/bind_internal.h:314
    #27 0x1a66db69 in RunImpl<void (blink::TaskHandle::Runner::*)(const blink::TaskHandle &), std::__1::tuple<base::WeakPtr<blink::TaskHandle::Runner>, blink::TaskHandle>, 0, 1> base/bind_internal.h:368
    #28 0x1a66db69 in base::internal::Invoker<base::internal::BindState<void (blink::TaskHandle::Runner::*)(blink::TaskHandle const&), base::WeakPtr<blink::TaskHandle::Runner>, blink::TaskHandle>, void ()>::RunOnce(base::internal::BindStateBase*) base/bind_internal.h:336
    #29 0xd309cf0 in Run base/callback.h:65:12
    #30 0xd309cf0 in RunInternal third_party/WebKit/Source/platform/wtf/Functional.h:258
    #31 0xd309cf0 in WTF::ThreadCheckingCallbackWrapper<base::OnceCallback<void ()>, void ()>::Run() third_party/WebKit/Source/platform/wtf/Functional.h:245
    #32 0xdc8b6f2 in Run base/callback.h:65:12
    #33 0xdc8b6f2 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:55
    #34 0xd430ded in blink::scheduler::TaskQueueManager::ProcessTaskFromWorkQueue(blink::scheduler::internal::WorkQueue*, blink::scheduler::LazyNow, base::TimeTicks*) third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc:543:21
    #35 0xd42efc6 in blink::scheduler::TaskQueueManager::DoWork(blink::scheduler::internal::Sequence::WorkType) third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc:343:13
    #36 0xd44011e in Invoke<const base::WeakPtr<blink::scheduler::TaskQueueManager> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:211:12
    #37 0xd44011e in MakeItSo<void (blink::scheduler::TaskQueueManager::*const &)(blink::scheduler::internal::Sequence::WorkType), const base::WeakPtr<blink::scheduler::TaskQueueManager> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:314
    #38 0xd44011e in RunImpl<void (blink::scheduler::TaskQueueManager::*const &)(blink::scheduler::internal::Sequence::WorkType), const std::__1::tuple<base::WeakPtr<blink::scheduler::TaskQueueManager>, blink::scheduler::internal::Sequence::WorkType> &, 0, 1> base/bind_internal.h:368
    #39 0xd44011e in base::internal::Invoker<base::internal::BindState<void (blink::scheduler::TaskQueueManager::*)(blink::scheduler::internal::Sequence::WorkType), base::WeakPtr<blink::scheduler::TaskQueueManager>, blink::scheduler::internal::Sequence::WorkType>, void ()>::Run(base::internal::BindStateBase*) base/bind_internal.h:350
    #40 0xdc8b6f2 in Run base/callback.h:65:12
    #41 0xdc8b6f2 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:55
    #42 0xd445dc6 in blink::scheduler::internal::ThreadControllerImpl::DoWork(blink::scheduler::internal::Sequence::WorkType) third_party/WebKit/Source/platform/scheduler/base/thread_controller_impl.cc:99:19
    #43 0xd44827e in Invoke<const base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:211:12
    #44 0xd44827e in MakeItSo<void (blink::scheduler::internal::ThreadControllerImpl::*const &)(blink::scheduler::internal::Sequence::WorkType), const base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:314
    #45 0xd44827e in RunImpl<void (blink::scheduler::internal::ThreadControllerImpl::*const &)(blink::scheduler::internal::Sequence::WorkType), const std::__1::tuple<base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl>, blink::scheduler::internal::Sequence::WorkType> &, 0, 1> base/bind_internal.h:368
    #46 0xd44827e in base::internal::Invoker<base::internal::BindState<void (blink::scheduler::internal::ThreadControllerImpl::*)(blink::scheduler::internal::Sequence::WorkType), base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl>, blink::scheduler::internal::Sequence::WorkType>, void ()>::Run(base::internal::BindStateBase*) base/bind_internal.h:350
    #47 0xdc8b6f2 in Run base/callback.h:65:12
    #48 0xdc8b6f2 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:55
    #49 0xdf16f50 in base::internal::IncomingTaskQueue::RunTask(base::PendingTask*) base/message_loop/incoming_task_queue.cc:124:19
    #50 0xdd04b0c in base::MessageLoop::RunTask(base::PendingTask*) base/message_loop/message_loop.cc:399:25
    #51 0xdd056d8 in base::MessageLoop::DeferOrRunPendingTask(base::PendingTask) base/message_loop/message_loop.cc:411:5
    #52 0xdd06030 in base::MessageLoop::DoWork() base/message_loop/message_loop.cc:455:16
    #53 0xdd0ad82 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) base/message_loop/message_pump_default.cc:37:31
Direct leak of 1056 byte(s) in 63 object(s) allocated from:
    #0 0x97d653 in __interceptor_malloc /b/build/slave/linux_upload_clang/build/src/third_party/llvm/compiler-rt/lib/asan/asan_malloc_linux.cc:88:3
    #1 0x19ba2350 in PartitionAllocGenericFlags base/allocator/partition_allocator/partition_alloc.h:946:18
    #2 0x19ba2350 in Alloc base/allocator/partition_allocator/partition_alloc.h:966
    #3 0x19ba2350 in BufferMalloc third_party/WebKit/Source/platform/wtf/allocator/Partitions.h:109
    #4 0x19ba2350 in WTF::PartitionAllocator::AllocateBacking(unsigned long, char const*) third_party/WebKit/Source/platform/wtf/allocator/PartitionAllocator.cpp:13
    #5 0x1b58b649 in AllocateVectorBacking<blink::Attribute> third_party/WebKit/Source/platform/wtf/allocator/PartitionAllocator.h:43:9
    #6 0x1b58b649 in WTF::VectorBufferBase<blink::Attribute, false, WTF::PartitionAllocator>::AllocateBuffer(unsigned long) third_party/WebKit/Source/platform/wtf/Vector.h:401
    #7 0x1c2a4c98 in VectorBuffer third_party/WebKit/Source/platform/wtf/Vector.h:496:7
    #8 0x1c2a4c98 in WTF::Vector<blink::Attribute, 0ul, WTF::PartitionAllocator>::Vector(WTF::Vector<blink::Attribute, 0ul, WTF::PartitionAllocator> const&) third_party/WebKit/Source/platform/wtf/Vector.h:1397
    #9 0x1c30a820 in blink::HTMLStackItem::HTMLStackItem(blink::ContainerNode*, blink::AtomicHTMLToken*, WTF::AtomicString const&) third_party/WebKit/Source/core/html/parser/HTMLStackItem.h:204:9
    #10 0x1c304fd4 in Create third_party/WebKit/Source/core/html/parser/HTMLStackItem.h:54:16
    #11 0x1c304fd4 in blink::HTMLConstructionSite::InsertHTMLElement(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp:695
    #12 0x1c3054cd in blink::HTMLConstructionSite::InsertFormattingElement(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp:713:3
    #13 0x1c273863 in blink::HTMLTreeBuilder::ProcessStartTagForInBody(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp
    #14 0x1c253f80 in blink::HTMLTreeBuilder::ProcessStartTag(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp
    #15 0x1c244d63 in blink::HTMLTreeBuilder::ProcessToken(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp:356:7
    #16 0x1c23ccec in blink::HTMLTreeBuilder::ConstructTree(blink::AtomicHTMLToken*) third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp:313:5
    #17 0x1c14d22d in ConstructTreeFromCompactHTMLToken third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp:747:18
    #18 0x1c14d22d in blink::HTMLDocumentParser::ProcessTokenizedChunkFromBackgroundParser(std::__1::unique_ptr<blink::HTMLDocumentParser::TokenizedChunk, std::__1::default_delete<blink::HTMLDocumentParser::TokenizedChunk> >) third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp:534
    #19 0x1c14591a in blink::HTMLDocumentParser::PumpPendingSpeculations() third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp:608:9
    #20 0x1c144b05 in blink::HTMLDocumentParser::ResumeParsingAfterYield() third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp:274:3
    #21 0xd309cf0 in Run base/callback.h:65:12
    #22 0xd309cf0 in RunInternal third_party/WebKit/Source/platform/wtf/Functional.h:258
    #23 0xd309cf0 in WTF::ThreadCheckingCallbackWrapper<base::OnceCallback<void ()>, void ()>::Run() third_party/WebKit/Source/platform/wtf/Functional.h:245
    #24 0x1a66c9ba in Run base/callback.h:65:12
    #25 0x1a66c9ba in blink::TaskHandle::Runner::Run(blink::TaskHandle const&) third_party/WebKit/Source/platform/WebTaskRunner.cpp:75
    #26 0x1a66db69 in Invoke<base::WeakPtr<blink::TaskHandle::Runner>, blink::TaskHandle> base/bind_internal.h:211:12
    #27 0x1a66db69 in MakeItSo<void (blink::TaskHandle::Runner::*)(const blink::TaskHandle &), base::WeakPtr<blink::TaskHandle::Runner>, blink::TaskHandle> base/bind_internal.h:314
    #28 0x1a66db69 in RunImpl<void (blink::TaskHandle::Runner::*)(const blink::TaskHandle &), std::__1::tuple<base::WeakPtr<blink::TaskHandle::Runner>, blink::TaskHandle>, 0, 1> base/bind_internal.h:368
    #29 0x1a66db69 in base::internal::Invoker<base::internal::BindState<void (blink::TaskHandle::Runner::*)(blink::TaskHandle const&), base::WeakPtr<blink::TaskHandle::Runner>, blink::TaskHandle>, void ()>::RunOnce(base::internal::BindStateBase*) base/bind_internal.h:336
    #30 0xd309cf0 in Run base/callback.h:65:12
    #31 0xd309cf0 in RunInternal third_party/WebKit/Source/platform/wtf/Functional.h:258
    #32 0xd309cf0 in WTF::ThreadCheckingCallbackWrapper<base::OnceCallback<void ()>, void ()>::Run() third_party/WebKit/Source/platform/wtf/Functional.h:245
    #33 0xdc8b6f2 in Run base/callback.h:65:12
    #34 0xdc8b6f2 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:55
    #35 0xd430ded in blink::scheduler::TaskQueueManager::ProcessTaskFromWorkQueue(blink::scheduler::internal::WorkQueue*, blink::scheduler::LazyNow, base::TimeTicks*) third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc:543:21
    #36 0xd42efc6 in blink::scheduler::TaskQueueManager::DoWork(blink::scheduler::internal::Sequence::WorkType) third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc:343:13
    #37 0xd44011e in Invoke<const base::WeakPtr<blink::scheduler::TaskQueueManager> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:211:12
    #38 0xd44011e in MakeItSo<void (blink::scheduler::TaskQueueManager::*const &)(blink::scheduler::internal::Sequence::WorkType), const base::WeakPtr<blink::scheduler::TaskQueueManager> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:314
    #39 0xd44011e in RunImpl<void (blink::scheduler::TaskQueueManager::*const &)(blink::scheduler::internal::Sequence::WorkType), const std::__1::tuple<base::WeakPtr<blink::scheduler::TaskQueueManager>, blink::scheduler::internal::Sequence::WorkType> &, 0, 1> base/bind_internal.h:368
    #40 0xd44011e in base::internal::Invoker<base::internal::BindState<void (blink::scheduler::TaskQueueManager::*)(blink::scheduler::internal::Sequence::WorkType), base::WeakPtr<blink::scheduler::TaskQueueManager>, blink::scheduler::internal::Sequence::WorkType>, void ()>::Run(base::internal::BindStateBase*) base/bind_internal.h:350
    #41 0xdc8b6f2 in Run base/callback.h:65:12
    #42 0xdc8b6f2 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:55
    #43 0xd445dc6 in blink::scheduler::internal::ThreadControllerImpl::DoWork(blink::scheduler::internal::Sequence::WorkType) third_party/WebKit/Source/platform/scheduler/base/thread_controller_impl.cc:99:19
    #44 0xd44827e in Invoke<const base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:211:12
    #45 0xd44827e in MakeItSo<void (blink::scheduler::internal::ThreadControllerImpl::*const &)(blink::scheduler::internal::Sequence::WorkType), const base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl> &, const blink::scheduler::internal::Sequence::WorkType &> base/bind_internal.h:314
    #46 0xd44827e in RunImpl<void (blink::scheduler::internal::ThreadControllerImpl::*const &)(blink::scheduler::internal::Sequence::WorkType), const std::__1::tuple<base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl>, blink::scheduler::internal::Sequence::WorkType> &, 0, 1> base/bind_internal.h:368
    #47 0xd44827e in base::internal::Invoker<base::internal::BindState<void (blink::scheduler::internal::ThreadControllerImpl::*)(blink::scheduler::internal::Sequence::WorkType), base::WeakPtr<blink::scheduler::internal::ThreadControllerImpl>, blink::scheduler::internal::Sequence::WorkType>, void ()>::Run(base::internal::BindStateBase*) base/bind_internal.h:350
    #48 0xdc8b6f2 in Run base/callback.h:65:12
    #49 0xdc8b6f2 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) base/debug/task_annotator.cc:55
    #50 0xdf16f50 in base::internal::IncomingTaskQueue::RunTask(base::PendingTask*) base/message_loop/incoming_task_queue.cc:124:19
    #51 0xdd04b0c in base::MessageLoop::RunTask(base::PendingTask*) base/message_loop/message_loop.cc:399:25
    #52 0xdd056d8 in base::MessageLoop::DeferOrRunPendingTask(base::PendingTask) base/message_loop/message_loop.cc:411:5
    #53 0xdd06030 in base::MessageLoop::DoWork() base/message_loop/message_loop.cc:455:16
Direct leak of 256 byte(s) in 1 object(s) allocated from:
    #0 0x97d653 in __interceptor_malloc /b/build/slave/linux_upload_clang/build/src/third_party/llvm/compiler-rt/lib/asan/asan_malloc_linux.cc:88:3
    #1 0x19ba2350 in PartitionAllocGenericFlags base/allocator/partition_allocator/partition_alloc.h:946:18
    #2 0x19ba2350 in Alloc base/allocator/partition_allocator/partition_alloc.h:966
    #3 0x19ba2350 in BufferMalloc third_party/WebKit/Source/platform/wtf/allocator/Partitions.h:109
    #4 0x19ba2350 in WTF::PartitionAllocator::AllocateBacking(unsigned long, char const*) third_party/WebKit/Source/platform/wtf/allocator/PartitionAllocator.cpp:13
    #5 0x1a7b1e42 in AllocateHashTableBacking<WTF::KeyValuePair<int, WTF::AtomicString>, WTF::HashTable<int, WTF::KeyValuePair<int, WTF::AtomicString>, WTF::KeyValuePairKeyExtractor, WTF::IntHash<unsigned int>, WTF::HashMapValueTraits<blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::HashTraits<WTF::AtomicString> >, blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::PartitionAllocator> > third_party/WebKit/Source/platform/wtf/allocator/PartitionAllocator.h:77:9
    #6 0x1a7b1e42 in AllocateTable third_party/WebKit/Source/platform/wtf/HashTable.h:1590
    #7 0x1a7b1e42 in WTF::HashTable<int, WTF::KeyValuePair<int, WTF::AtomicString>, WTF::KeyValuePairKeyExtractor, WTF::IntHash<unsigned int>, WTF::HashMapValueTraits<blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::HashTraits<WTF::AtomicString> >, blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::PartitionAllocator>::Rehash(unsigned int, WTF::KeyValuePair<int, WTF::AtomicString>*) third_party/WebKit/Source/platform/wtf/HashTable.h:1798
    #8 0x1a7b19dc in WTF::HashTable<int, WTF::KeyValuePair<int, WTF::AtomicString>, WTF::KeyValuePairKeyExtractor, WTF::IntHash<unsigned int>, WTF::HashMapValueTraits<blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::HashTraits<WTF::AtomicString> >, blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::PartitionAllocator>::ReserveCapacityForSize(unsigned int) third_party/WebKit/Source/platform/wtf/HashTable.h:1014:5
    #9 0x1a7b1143 in WTF::HashTable<int, WTF::KeyValuePair<int, WTF::AtomicString>, WTF::KeyValuePairKeyExtractor, WTF::IntHash<unsigned int>, WTF::HashMapValueTraits<blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::HashTraits<WTF::AtomicString> >, blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::PartitionAllocator>::HashTable(WTF::HashTable<int, WTF::KeyValuePair<int, WTF::AtomicString>, WTF::KeyValuePairKeyExtractor, WTF::IntHash<unsigned int>, WTF::HashMapValueTraits<blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::HashTraits<WTF::AtomicString> >, blink::GenericFontFamilySettings::UScriptCodeHashTraits, WTF::PartitionAllocator> const&) third_party/WebKit/Source/platform/wtf/HashTable.h:1859:5
    #10 0x1a7aca9e in HashMap third_party/WebKit/Source/platform/wtf/HashMap.h:99:3
    #11 0x1a7aca9e in blink::GenericFontFamilySettings::GenericFontFamilySettings(blink::GenericFontFamilySettings const&) third_party/WebKit/Source/platform/fonts/GenericFontFamilySettings.cpp:41
    #12 0x22bd4eef in blink::CSSFontSelector::CSSFontSelector(blink::Document*) third_party/WebKit/Source/core/css/CSSFontSelector.cpp:48:7
    #13 0x1ae90aca in Create third_party/WebKit/Source/core/css/CSSFontSelector.h:46:16
    #14 0x1ae90aca in blink::StyleEngine::StyleEngine(blink::Document&) third_party/WebKit/Source/core/css/StyleEngine.cpp:76
    #15 0x1b443002 in Create third_party/WebKit/Source/core/css/StyleEngine.h:92:16
    #16 0x1b443002 in blink::Document::Document(blink::DocumentInit const&, unsigned char) third_party/WebKit/Source/core/dom/Document.cpp:720
    #17 0x1c061d6f in blink::HTMLDocument::HTMLDocument(blink::DocumentInit const&, unsigned char) third_party/WebKit/Source/core/html/HTMLDocument.cpp:67:7
    #18 0x1b417e9a in Create third_party/WebKit/Source/core/html/HTMLDocument.h:37:16
    #19 0x1b417e9a in blink::DOMImplementation::createDocument(WTF::String const&, blink::DocumentInit const&, bool) third_party/WebKit/Source/core/dom/DOMImplementation.cpp:233
    #20 0x1bd98388 in blink::LocalDOMWindow::CreateDocument(WTF::String const&, blink::DocumentInit const&, bool) third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp:299:16
    #21 0x1bd98864 in blink::LocalDOMWindow::InstallNewDocument(WTF::String const&, blink::DocumentInit const&, bool) third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp:321:15
    #22 0x1d2e39b9 in blink::DocumentLoader::InstallNewDocument(blink::KURL const&, blink::Document*, blink::WebGlobalObjectReusePolicy, WTF::AtomicString const&, WTF::AtomicString const&, blink::DocumentLoader::InstallNewDocumentReason, blink::ParserSynchronizationPolicy, blink::KURL const&) third_party/WebKit/Source/core/loader/DocumentLoader.cpp:1051:45
    #23 0x1d2e2fc7 in blink::DocumentLoader::CommitNavigation(WTF::AtomicString const&, blink::KURL const&) third_party/WebKit/Source/core/loader/DocumentLoader.cpp:694:3
    #24 0x1d2df37b in blink::DocumentLoader::CommitData(char const*, unsigned long) third_party/WebKit/Source/core/loader/DocumentLoader.cpp:707:3
    #25 0x1d2de0d4 in blink::DocumentLoader::FinishedLoading(double) third_party/WebKit/Source/core/loader/DocumentLoader.cpp:462:7
    #26 0x1d2e589b in blink::DocumentLoader::MaybeLoadEmpty() third_party/WebKit/Source/core/loader/DocumentLoader.cpp:842:3
    #27 0x1d2e5c9b in blink::DocumentLoader::StartLoading() third_party/WebKit/Source/core/loader/DocumentLoader.cpp:852:7
    #28 0x1d312171 in blink::FrameLoader::Init() third_party/WebKit/Source/core/loader/FrameLoader.cpp:288:33
    #29 0x1bdd0e6f in blink::LocalFrame::Init() third_party/WebKit/Source/core/frame/LocalFrame.cpp:164:11
    #30 0x1bf46685 in blink::WebLocalFrameImpl::InitializeCoreFrame(blink::Page&, blink::FrameOwner*, WTF::AtomicString const&) third_party/WebKit/Source/core/frame/WebLocalFrameImpl.cpp:1754:11
    #31 0x1bf45688 in blink::WebLocalFrameImpl::CreateMainFrame(blink::WebView*, blink::WebFrameClient*, blink::InterfaceRegistry*, blink::WebFrame*, blink::WebString const&, blink::WebSandboxFlags) third_party/WebKit/Source/core/frame/WebLocalFrameImpl.cpp:1632:10
    #32 0x1f82c14d in content::RenderFrameImpl::CreateMainFrame(content::RenderViewImpl*, int, mojo::InterfacePtr<service_manager::mojom::InterfaceProvider>, int, bool, content::ScreenInfo const&, content::CompositorDependencies*, blink::WebFrame*, base::UnguessableToken const&, content::FrameReplicationState const&, bool) content/renderer/render_frame_impl.cc:1087:30
    #33 0x1f933400 in content::RenderViewImpl::Initialize(mojo::StructPtr<content::mojom::CreateViewParams>, base::RepeatingCallback<void (content::RenderWidget*, blink::WebNavigationPolicy, gfx::Rect const&)> const&) content/renderer/render_view_impl.cc:608:26
    #34 0x1f93b83b in content::RenderViewImpl::Create(content::CompositorDependencies*, mojo::StructPtr<content::mojom::CreateViewParams>, base::RepeatingCallback<void (content::RenderWidget*, blink::WebNavigationPolicy, gfx::Rect const&)> const&, scoped_refptr<base::SingleThreadTaskRunner>) content/renderer/render_view_impl.cc:1027:16
    #35 0x1f9143dc in content::RenderThreadImpl::CreateView(mojo::StructPtr<content::mojom::CreateViewParams>) content/renderer/render_thread_impl.cc:2169:3
    #36 0x6269026 in content::mojom::RendererStubDispatch::Accept(content::mojom::Renderer*, mojo::Message*) out/Release/gen/content/common/renderer.mojom.cc:745:13
    #37 0x123cb0e2 in mojo::InterfaceEndpointClient::HandleValidatedMessage(mojo::Message*) mojo/public/cpp/bindings/lib/interface_endpoint_client.cc:419:32
    #38 0x12426027 in mojo::FilterChain::Accept(mojo::Message*) mojo/public/cpp/bindings/lib/filter_chain.cc:40:17

and so on - there are others.