240051 2022-05-03 18:18:15 -0700 REGRESSION(r293285): ASSERTION FAILED: m_isConstructed /Volumes/Data/worker/Apple-Monterey-Debug-Build/build/WebKitBuild/Debug/usr/local/include/wtf/NeverDestroyed.h(152) : ..... [T = const WTF::AtomString, AccessTraits = WTF::MainThreadAccessTraits] 2022-05-03 23:25:53 -0700 1 1 1 Unclassified WebKit WebCore Misc. WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 jenner cdumez cdumez webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1866337 0 jenner 2022-05-03 18:18:15 -0700 TestWebKitAPI.DocumentOrder.Positions is a constant assertion/crash on Debug only on BigSur and higher, as well as iOS 15. HISTORY: https://results.webkit.org/?suite=api-tests&test=TestWebKitAPI.DocumentOrder.Positions TestWebKitAPI.DocumentOrder.Positions ASSERTION FAILED: m_isConstructed /Volumes/Data/worker/Apple-Monterey-Debug-Build/build/WebKitBuild/Debug/usr/local/include/wtf/NeverDestroyed.h(152) : WTF::LazyNeverDestroyed::PointerType WTF::LazyNeverDestroyed<const WTF::AtomString, WTF::MainThreadAccessTraits>::storagePointerWithoutAccessCheck() const [T = const WTF::AtomString, AccessTraits = WTF::MainThreadAccessTraits] 1 0x12c067849 WTFCrash 2 0x134f1ee3b WTFCrashWithInfo(int, char const*, char const*, int) 3 0x135232c67 WTF::LazyNeverDestroyed<WTF::AtomString const, WTF::MainThreadAccessTraits>::storagePointerWithoutAccessCheck() const 4 0x135232bf2 WTF::LazyNeverDestroyed<WTF::AtomString const, WTF::MainThreadAccessTraits>::storagePointer() const 5 0x135232bc5 WTF::LazyNeverDestroyed<WTF::AtomString const, WTF::MainThreadAccessTraits>::get() 6 0x138bd4850 WebCore::plaintextOnlyAtom() 7 0x138f049f4 WebCore::TextControlInnerTextElement::updateInnerTextElementEditabilityImpl(bool, bool) 8 0x138f0489f WebCore::TextControlInnerTextElement::create(WebCore::Document&, bool) 9 0x138cf5ea5 WebCore::HTMLTextAreaElement::didAddUserAgentShadowRoot(WebCore::ShadowRoot&) 10 0x138791d11 WebCore::Element::addShadowRoot(WTF::Ref<WebCore::ShadowRoot, WTF::RawPtrTraits<WebCore::ShadowRoot> >&&) 11 0x1387926c1 WebCore::Element::createUserAgentShadowRoot() 12 0x1387925da WebCore::Element::ensureUserAgentShadowRoot() 13 0x138cf5d67 WebCore::HTMLTextAreaElement::create(WebCore::QualifiedName const&, WebCore::Document&, WebCore::HTMLFormElement*) 14 0x138cf5e4b WebCore::HTMLTextAreaElement::create(WebCore::Document&) 15 0x10eb3f9ac TestWebKitAPI::DocumentOrder_Positions_Test::TestBody() 16 0x10f83610b void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) 17 0x10f7fa51a void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) 18 0x10f7fa463 testing::Test::Run() 19 0x10f7fb5e1 testing::TestInfo::Run() 20 0x10f7fc684 testing::TestSuite::Run() 21 0x10f80b79b testing::internal::UnitTestImpl::RunAllTests() 22 0x10f83b04b bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) 23 0x10f80b15a bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) 24 0x10f80b045 testing::UnitTest::Run() 25 0x10eebd591 RUN_ALL_TESTS() 26 0x10eebd526 TestWebKitAPI::TestsController::run(int, char**) 27 0x10f7c7f92 main 28 0x11a1c851e 1866338 1 webkit-bug-importer 2022-05-03 18:18:35 -0700 <rdar://problem/92705033> 1866343 2 jenner 2022-05-03 18:34:56 -0700 I was able to reproduce the failure at iOS15 Debug ToT using the following test: run-api-tests TestWebKitAPI.DocumentOrder.Positions I was also able to determine the regression point. The test continues to crash as far back as r293285 or 249910@Main, but passes at the commit directly before r293279 or 249909@Main. So it appears that r293285 is what caused this test to start crashing. 1866353 3 cdumez 2022-05-03 19:14:18 -0700 Pull request: https://github.com/WebKit/WebKit/pull/489 1866377 4 ews-feeder 2022-05-03 23:25:51 -0700 Committed r293762 (250241@main): <https://commits.webkit.org/250241@main> Reviewed commits have been landed. Closing PR #489 and removing active labels.