205397 2019-12-18 08:24:50 -0800 REGRESSION: 32 Tests Crashing on Mac Debug wk2 with ASSERTION FAILED: m_pendingActivityForEventDispatch 2019-12-18 08:46:29 -0800 1 1 1 Unclassified WebKit Tools / Tests WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 205359 1 tsavell cdumez cdumez webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1599815 0 tsavell 2019-12-18 08:24:50 -0800 32 tests are crashing on Mac Debug wk2 with ASSERTION FAILED: m_pendingActivityForEventDispatch I am able to reproduced this crash locally by running these tests in iterations. Build: https://build.webkit.org/builders/Apple%20Mojave%20Debug%20WK2%20%28Tests%29/builds/6469 crash example: https://build.webkit.org/results/Apple%20Mojave%20Debug%20WK2%20(Tests)/r253670%20(6469)/http/wpt/service-workers/ready.https.window-crash-log.txt I am able to reproduce this on 253667 but not 253666. http/tests/workers/service/ServiceWorkerGlobalScope_clients_SameObject.html [ Crash ] http/tests/workers/service/page-caching.html [ Crash ] http/tests/workers/service/service-worker-download.https.html [ Crash ] http/tests/workers/service/service-worker-registration-gc-event.html [ Crash ] http/wpt/service-workers/ready.https.window.html [ Crash ] http/wpt/service-workers/third-party-cookie.html [ Crash ] http/wpt/service-workers/third-party-registration.html [ Crash ] imported/w3c/web-platform-tests/content-security-policy/worker-src/service-worker-src-self-fallback.https.sub.html [ Crash ] imported/w3c/web-platform-tests/fetch/api/abort/serviceworker-intercepted.https.html [ Crash ] imported/w3c/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.serviceworker.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/cache-storage/serviceworker/cache-storage-keys.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/activation.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/clients-matchall-on-evaluation.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/extendable-event-async-waituntil.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/extendable-event-waituntil.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/fetch-canvas-tainting-image-cache.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/fetch-event-after-navigation-within-page.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/fetch-event-async-respond-with.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/fetch-event-respond-with-custom-response.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/fetch-event-throws-after-respond-with.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/fetch-event-within-sw.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/fetch-frame-resource.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/fetch-waits-for-activate.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/immutable-prototype-serviceworker.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/indexeddb.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/iso-latin1-header.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/local-url-inherit-controller.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/navigate-window.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/register-same-scope-different-script-url.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/registration-basic.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/registration-scope.https.html [ Crash ] imported/w3c/web-platform-tests/service-workers/service-worker/xhr-response-url.https.html [ Crash ] 1599816 1 webkit-bug-importer 2019-12-18 08:25:19 -0800 <rdar://problem/58043626> 1599819 2 cdumez 2019-12-18 08:26:33 -0800 Looking. 1599828 3 cdumez 2019-12-18 08:46:29 -0800 Committed r253688: <https://trac.webkit.org/changeset/253688>