crash log for unknown process name (pid <unknown>):
STDOUT: CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
STDOUT: CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access. The response had HTTP status code 401.
STDOUT: CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: Credentials flag is 'true', but the 'Access-Control-Allow-Credentials' header is ''. It must be 'true' to allow credentials.
STDOUT: CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
STDOUT: CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
STDOUT: CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: Credentials flag is 'true', but the 'Access-Control-Allow-Credentials' header is ''. It must be 'true' to allow credentials.
STDOUT:  This is a testharness.js-based test.
STDOUT: PASS Verify canvas tainting of fetched image in a Service Worker 
STDOUT: Harness: the test ran to completion.
STDOUT: 
STDERR: OUTPUT CONTAINS "AddressSanitizer", so we are treating this test as if it crashed, even though it did not.
STDERR: 
STDERR: =================================================================
STDERR: ==4==ERROR: AddressSanitizer: use-after-poison on address 0x7f2dde10b6e4 at pc 0x000004d38c60 bp 0x7f2db08fe150 sp 0x7f2db08fe148
STDERR: READ of size 4 at 0x7f2dde10b6e4 thread T32 (ServiceWorker T)
STDERR:     #0 0x4d38c5f in blink::ReadableStream::error(blink::DOMException*) third_party/WebKit/Source/core/streams/ReadableStream.cpp:118:9
STDERR:     #1 0x4d3b6b3 in blink::ReadableStreamReader::stop() third_party/WebKit/Source/core/streams/ReadableStreamReader.cpp:125:9
STDERR:     #2 0x3c812b4 in blink::ContextLifecycleNotifier::notifyStoppingActiveDOMObjects() third_party/WebKit/Source/core/dom/ContextLifecycleNotifier.cpp:92:13
STDERR:     #3 0x4d81c9e in blink::WorkerThreadShutdownStartTask::performTask(blink::ExecutionContext*) third_party/WebKit/Source/core/workers/WorkerThread.cpp:415:9
STDERR:     #4 0x4d83a0b in blink::WorkerThreadTask::run() third_party/WebKit/Source/core/workers/WorkerThread.cpp:219:13
STDERR:     #5 0x745e618 in Run base/bind_internal.h:157:12
STDERR:     #6 0x745e618 in MakeItSo base/bind_internal.h:293:0
STDERR:     #7 0x745e618 in base::internal::Invoker<IndexSequence<0ul>, base::internal::BindState<base::internal::RunnableAdapter<void (*)(scoped_ptr<blink::WebThread::Task, base::DefaultDeleter<blink::WebThread::Task> >)>, void (scoped_ptr<blink::WebThread::Task, base::DefaultDeleter<blink::WebThread::Task> >), base::internal::TypeList<base::internal::PassedWrapper<scoped_ptr<blink::WebThread::Task, base::DefaultDeleter<blink::WebThread::Task> > > > >, base::internal::TypeList<base::internal::UnwrapTraits<base::internal::PassedWrapper<scoped_ptr<blink::WebThread::Task, base::DefaultDeleter<blink::WebThread::Task> > > > >, base::internal::InvokeHelper<false, void, base::internal::RunnableAdapter<void (*)(scoped_ptr<blink::WebThread::Task, base::DefaultDeleter<blink::WebThread::Task> >)>, base::internal::TypeList<scoped_ptr<blink::WebThread::Task, base::DefaultDeleter<blink::WebThread::Task> > > >, void ()>::Run(base::internal::BindStateBase*) base/bind_internal.h:343:0
STDERR:     #8 0x735bd7 in Run base/callback.h:396:12
STDERR:     #9 0x735bd7 in base::debug::TaskAnnotator::RunTask(char const*, char const*, base::PendingTask const&) base/debug/task_annotator.cc:62:0
STDERR:     #10 0x745845d in scheduler::TaskQueueManager::ProcessTaskFromWorkQueue(unsigned long, bool, base::PendingTask*) components/scheduler/child/task_queue_manager.cc:653:5
STDERR:     #11 0x74569f5 in scheduler::TaskQueueManager::DoWork(bool) components/scheduler/child/task_queue_manager.cc:608:9
STDERR:     #12 0x735bd7 in Run base/callback.h:396:12
STDERR:     #13 0x735bd7 in base::debug::TaskAnnotator::RunTask(char const*, char const*, base::PendingTask const&) base/debug/task_annotator.cc:62:0
STDERR:     #14 0x684a67 in base::MessageLoop::RunTask(base::PendingTask const&) base/message_loop/message_loop.cc:444:3
STDERR:     #15 0x685a6d in DeferOrRunPendingTask base/message_loop/message_loop.cc:454:5
STDERR:     #16 0x685a6d in base::MessageLoop::DoWork() base/message_loop/message_loop.cc:566:0
STDERR:     #17 0x68a650 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) base/message_loop/message_pump_default.cc:32:21
STDERR:     #18 0x6a5248 in base::RunLoop::Run() base/run_loop.cc:55:3
STDERR:     #19 0x68346e in base::MessageLoop::Run() base/message_loop/message_loop.cc:303:3
STDERR:     #20 0x8086440 in base::Thread::ThreadMain() base/threading/thread.cc:235:5
STDERR:     #21 0x6e237b in base::(anonymous namespace)::ThreadFunc(void*) base/threading/platform_thread_posix.cc:77:3
STDERR:     #22 0x7f2df04ede99 in start_thread /build/buildd/eglibc-2.15/nptl/pthread_create.c:308:0
STDERR: 
STDERR: AddressSanitizer can not describe address in more detail (wild memory access suspected).
STDERR: SUMMARY: AddressSanitizer: use-after-poison (/mnt/data/b/build/slave/WebKit_Linux_ASAN/build/src/out/Release/content_shell+0x4d38c5f)
STDERR: Shadow bytes around the buggy address:
STDERR:   0x0fe63bc19680: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
STDERR:   0x0fe63bc19690: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
STDERR:   0x0fe63bc196a0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
STDERR:   0x0fe63bc196b0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
STDERR:   0x0fe63bc196c0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
STDERR: =>0x0fe63bc196d0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7[f7]f7 f7 f7
STDERR:   0x0fe63bc196e0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
STDERR:   0x0fe63bc196f0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 00 00 00 00
STDERR:   0x0fe63bc19700: 00 00 00 00 00 00 00 00 00 f7 f7 f7 f7 f7 f7 f7
STDERR:   0x0fe63bc19710: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
STDERR:   0x0fe63bc19720: f7 f7 f7 f7 f7 f7 00 00 00 00 00 00 00 00 00 00
STDERR: Shadow byte legend (one shadow byte represents 8 application bytes):
STDERR:   Addressable:           00
STDERR:   Partially addressable: 01 02 03 04 05 06 07
STDERR:   Heap left redzone:       fa
STDERR:   Heap right redzone:      fb
STDERR:   Freed heap region:       fd
STDERR:   Stack left redzone:      f1
STDERR:   Stack mid redzone:       f2
STDERR:   Stack right redzone:     f3
STDERR:   Stack partial redzone:   f4
STDERR:   Stack after return:      f5
STDERR:   Stack use after scope:   f8
STDERR:   Global redzone:          f9
STDERR:   Global init order:       f6
STDERR:   Poisoned by user:        f7
STDERR:   Container overflow:      fc
STDERR:   Array cookie:            ac
STDERR:   Intra object redzone:    bb
STDERR:   ASan internal:           fe
STDERR:   Left alloca redzone:     ca
STDERR:   Right alloca redzone:    cb
STDERR: Thread T32 (ServiceWorker T) created by T0 (content_shell) here:
STDERR:     #0 0x4a7c69 in __interceptor_pthread_create ??:0:0
STDERR:     #1 0x6e1aa9 in base::(anonymous namespace)::CreateThread(unsigned long, bool, base::PlatformThread::Delegate*, base::PlatformThreadHandle*, base::ThreadPriority) base/threading/platform_thread_posix.cc:117:13
STDERR:     #2 0x8085b27 in base::Thread::StartWithOptions(base::Thread::Options const&) base/threading/thread.cc:110:8
STDERR:     #3 0x80858b8 in base::Thread::Start() base/threading/thread.cc:95:10
STDERR:     #4 0x7448660 in scheduler::WebThreadImplForWorkerScheduler::WebThreadImplForWorkerScheduler(char const*) components/scheduler/child/webthread_impl_for_worker_scheduler.cc:19:3
STDERR:     #5 0x734ba5a in content::BlinkPlatformImpl::createThread(char const*) content/child/blink_platform_impl.cc:526:11
STDERR:     #6 0x8fabf26 in WebThreadSupportingGC third_party/WebKit/Source/platform/WebThreadSupportingGC.cpp:22:25
STDERR:     #7 0x8fabf26 in blink::WebThreadSupportingGC::create(char const*) third_party/WebKit/Source/platform/WebThreadSupportingGC.cpp:18:0
STDERR:     #8 0x300c78c in blink::ServiceWorkerThread::backingThread() third_party/WebKit/Source/modules/serviceworkers/ServiceWorkerThread.cpp:62:20
STDERR:     #9 0x4d7b9ad in blink::WorkerThread::start() third_party/WebKit/Source/core/workers/WorkerThread.cpp:286:5
STDERR:     #10 0x2e74ab7 in blink::WebEmbeddedWorkerImpl::startWorkerThread() third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp:436:5
STDERR:     #11 0x2e77a00 in blink::WebEmbeddedWorkerImpl::onScriptLoaderFinished() third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp:392:5
STDERR:     #12 0x4d7a096 in notifyFinished third_party/WebKit/Source/core/workers/WorkerScriptLoader.cpp:197:5
STDERR:     #13 0x4d7a096 in blink::WorkerScriptLoader::didFinishLoading(unsigned long, double) third_party/WebKit/Source/core/workers/WorkerScriptLoader.cpp:161:0
STDERR:     #14 0x4836c44 in blink::Resource::checkNotify() third_party/WebKit/Source/core/fetch/Resource.cpp:248:9
STDERR:     #15 0x48379bd in blink::Resource::finish() third_party/WebKit/Source/core/fetch/Resource.cpp:307:5
STDERR:     #16 0x48653ef in blink::ResourceLoader::didFinishLoading(blink::WebURLLoader*, double, long) third_party/WebKit/Source/core/fetch/ResourceLoader.cpp:453:5
STDERR:     #17 0x73c24c2 in content::WebURLLoaderImpl::Context::OnCompletedRequest(int, bool, bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, base::TimeTicks const&, long) content/child/web_url_loader_impl.cc:757:9
STDERR:     #18 0x73a67f6 in content::ResourceDispatcher::OnRequestComplete(int, ResourceMsg_RequestCompleteData const&) content/child/resource_dispatcher.cc:368:3
STDERR:     #19 0x73a15b0 in DispatchToMethodImpl<content::ResourceDispatcher, void (content::ResourceDispatcher::*)(int, const ResourceMsg_RequestCompleteData &), int, ResourceMsg_RequestCompleteData, 0, 1> base/tuple.h:252:3
STDERR:     #20 0x73a15b0 in DispatchToMethod<content::ResourceDispatcher, void (content::ResourceDispatcher::*)(int, const ResourceMsg_RequestCompleteData &), int, ResourceMsg_RequestCompleteData> base/tuple.h:259:0
STDERR:     #21 0x73a15b0 in Dispatch<content::ResourceDispatcher, content::ResourceDispatcher, void, void (content::ResourceDispatcher::*)(int, const ResourceMsg_RequestCompleteData &)> content/common/resource_messages.h:349:0
STDERR:     #22 0x73a15b0 in content::ResourceDispatcher::DispatchMessage(IPC::Message const&) content/child/resource_dispatcher.cc:514:0
STDERR:     #23 0x739fef8 in content::ResourceDispatcher::OnMessageReceived(IPC::Message const&) content/child/resource_dispatcher.cc:117:3
STDERR:     #24 0x735bd7 in Run base/callback.h:396:12
STDERR:     #25 0x735bd7 in base::debug::TaskAnnotator::RunTask(char const*, char const*, base::PendingTask const&) base/debug/task_annotator.cc:62:0
STDERR:     #26 0x745845d in scheduler::TaskQueueManager::ProcessTaskFromWorkQueue(unsigned long, bool, base::PendingTask*) components/scheduler/child/task_queue_manager.cc:653:5
STDERR:     #27 0x74569f5 in scheduler::TaskQueueManager::DoWork(bool) components/scheduler/child/task_queue_manager.cc:608:9
STDERR:     #28 0x735bd7 in Run base/callback.h:396:12
STDERR:     #29 0x735bd7 in base::debug::TaskAnnotator::RunTask(char const*, char const*, base::PendingTask const&) base/debug/task_annotator.cc:62:0
STDERR:     #30 0x684a67 in base::MessageLoop::RunTask(base::PendingTask const&) base/message_loop/message_loop.cc:444:3
STDERR:     #31 0x685a6d in DeferOrRunPendingTask base/message_loop/message_loop.cc:454:5
STDERR:     #32 0x685a6d in base::MessageLoop::DoWork() base/message_loop/message_loop.cc:566:0
STDERR:     #33 0x68a650 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) base/message_loop/message_pump_default.cc:32:21
STDERR:     #34 0x6a5248 in base::RunLoop::Run() base/run_loop.cc:55:3
STDERR:     #35 0x68346e in base::MessageLoop::Run() base/message_loop/message_loop.cc:303:3
STDERR:     #36 0x755209d in content::RendererMain(content::MainFunctionParams const&) content/renderer/renderer_main.cc:220:7
STDERR:     #37 0x62ffc9 in content::RunZygote(content::MainFunctionParams const&, content::ContentMainDelegate*) content/app/content_main_runner.cc:308:14
STDERR:     #38 0x631f3f in content::ContentMainRunnerImpl::Run() content/app/content_main_runner.cc:783:12
STDERR:     #39 0x62f55a in content::ContentMain(content::ContentMainParams const&) content/app/content_main.cc:19:15
STDERR:     #40 0x4e06d5 in main content/shell/app/shell_main.cc:49:10
STDERR:     #41 0x7f2dece1776c in __libc_start_main /build/buildd/eglibc-2.15/csu/libc-start.c:226:0
STDERR: