https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=content_unittests&tests=EmbeddedWorkerInstanceTest.RemoveRemoteInterface

Happens to me locally when running running out/Default/content_unittests --gtest_filter="EmbeddedWorkerInstanceTest*"

Seems to have started around April 5. Could possibly be https://chromium.googlesource.com/chromium/src/+/c467f3db3f1e4d2aef973373740d7213e6660246?

26509:26509:0411/173722.867285:2028739088238:FATAL:worker_devtools_agent_host.cc(116)] Check failed: WORKER_TERMINATED == state_ (2 vs. 0)
#0 0x7fe56a1f2f37 base::debug::StackTrace::StackTrace()
#1 0x7fe56a218aab logging::LogMessage::~LogMessage()
#2 0x7fe568ed4ace content::WorkerDevToolsAgentHost::WorkerRestarted()
#3 0x7fe568ed16df content::ServiceWorkerDevToolsManager::WorkerCreated()
#4 0x7fe56918aa9c content::(anonymous namespace)::SetupOnUI()
#5 0x7fe56918afb2 _ZN4base8internal7InvokerINS0_9BindStateIPFviPKN7content24ServiceWorkerContextCoreERKNS_7WeakPtrIS4_EElRK4GURLSD_bN4mojo16InterfaceRequestINS3_5mojom28EmbeddedWorkerInstanceClientEEERKNS_8CallbackIFvibELNS0_8CopyModeE1ELNS0_10RepeatModeE1EEEEJiPS4_S8_lSB_SB_bNS0_13PassedWrapperISI_EESN_EEEFvvEE3RunEPNS0_13BindStateBaseE
#6 0x7fe56a1f3a21 _ZNO4base8CallbackIFvvELNS_8internal8CopyModeE0ELNS2_10RepeatModeE0EE3RunEv
#7 0x7fe56a1f3853 base::debug::TaskAnnotator::RunTask()
#8 0x7fe56a22519d base::MessageLoop::RunTask()
#9 0x7fe56a225448 base::MessageLoop::DeferOrRunPendingTask()
#10 0x7fe56a2258f6 base::MessageLoop::DoWork()
#11 0x7fe56a2289f9 base::MessagePumpLibevent::Run()
#12 0x7fe56a224efe base::MessageLoop::RunHandler()
#13 0x7fe56a25715c base::RunLoop::Run()
#14 0x0000012ff923 content::EmbeddedWorkerInstanceTest_RemoveRemoteInterface_Test::TestBody()
#15 0x000001bc3026 testing::Test::Run()
#16 0x000001bc3a40 testing::TestInfo::Run()
#17 0x000001bc3f67 testing::TestCase::Run()
#18 0x000001bcb097 testing::internal::UnitTestImpl::RunAllTests()