Bug 308135 – [scroll-animations] crash under `StyleOriginatedTimelinesController::styleableWasRemoved()`

• Component: Animations
• Status: RESOLVED FIXED

[Antoine Quint]

We have gotten reports of a crash under `StyleOriginatedTimelinesController:: styleableWasRemoved()`.

Trimmed crash signature:

10 WTF::TypeCastTraits<WebCore::CSSAnimation const, WebCore::WebAnimation const, false>::isType(WebCore::WebAnimation const&) (WebCore)
  10 WTF::TypeCastTraits<WebCore::CSSAnimation const, WebCore::WebAnimation const, false>::isOfType(WebCore::WebAnimation const&) (WebCore)
    10 bool WTF::is<WebCore::CSSAnimation, WebCore::WebAnimation>(WebCore::WebAnimation const&) (WebCore)
      10 std::__1::conditional<std::is_const_v<WebCore::WebAnimation>, std::__1::add_const<WebCore::CSSAnimation>::type, __remove_const(WebCore::CSSAnimation)>::type* WTF::dynamicDowncast<WebCore::CSSAnimation, WebCore::WebAnimation>(WebCore::WebAnimation&) (WebCore)
==> 10 WebCore::StyleOriginatedTimelinesController::styleableWasRemoved(WebCore::Styleable const&) (WebCore) <==
          10 WebCore::Styleable::elementWasRemoved() const (WebCore)
            10 WebCore::Element::removedFromAncestor(WebCore::Node::RemovalType, WebCore::ContainerNode&) (WebCore)
              10 WebCore::notifyNodeRemovedFromDocument(WebCore::ContainerNode&, WebCore::TreeScopeChange, WebCore::Node&) (WebCore)
                10 WebCore::notifyChildNodeRemoved(WebCore::ContainerNode&, WebCore::Node&) (WebCore)
                  10 WebCore::ContainerNode::removeNodeWithScriptAssertion(WebCore::Node&, WebCore::ContainerNode::ChildChange::Source) (WebCore)
                    10 WebCore::ContainerNode::removeChild(WebCore::Node&) (WebCore)
                      10 WebCore::Node::removeChild(WebCore::Node&) (WebCore)
                        10 WebCore::jsNodePrototypeFunction_removeChildBody(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSNode*)::'lambda'()::operator()() const (WebCore)
                          10 void WebCore::invokeFunctorPropagatingExceptionIfNecessary<WebCore::jsNodePrototypeFunction_removeChildBody(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSNode*)::'lambda'()>(JSC::JSGlobalObject&, JSC::ThrowScope&, WebCore::jsNodePrototypeFunction_removeChildBody(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSNode*)::'lambda'()&&) (WebCore)
                            10 WebCore::jsNodePrototypeFunction_removeChildBody(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSNode*) (WebCore)
                              10 long long WebCore::IDLOperation<WebCore::JSNode>::call<&WebCore::jsNodePrototypeFunction_removeChildBody(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSNode*), (WebCore::CastedThisErrorBehavior)0>(JSC::JSGlobalObject&, JSC::CallFrame&, char const*) (WebCore)
                                10 WebCore::jsNodePrototypeFunction_removeChild(JSC::JSGlobalObject*, JSC::CallFrame*) (WebCore)
                                  9 JSC::JSValue JSC::callMicrotask<>(JSC::JSGlobalObject*, JSC::JSValue, JSC::JSValue, JSC::JSCell*, WTF::ASCIILiteral) (JavaScriptCore)
                                  | 9 WebCore::MicrotaskQueue::runJSMicrotask(JSC::JSGlobalObject*, JSC::VM&, JSC::QueuedTask&) (WebCore)
                                  |   9 WebCore::MicrotaskQueue::performMicrotaskCheckpoint()::$_0::operator()(JSC::QueuedTask&) const (WebCore)
                                  |     9 void JSC::MicrotaskQueue::performMicrotaskCheckpoint<false, WebCore::MicrotaskQueue::performMicrotaskCheckpoint()::$_0>(JSC::VM&, WebCore::MicrotaskQueue::performMicrotaskCheckpoint()::$_0 const&) (WebCore)
                                  |       9 WebCore::MicrotaskQueue::performMicrotaskCheckpoint() (WebCore)
                                  |         9 WebCore::EventLoop::performMicrotaskCheckpoint() (WebCore)
                                  |           9 WebCore::EventLoopTaskGroup::performMicrotaskCheckpoint() (WebCore)

[Antoine Quint]

rdar://170564381

[Antoine Quint]

Pull request: https://github.com/WebKit/WebKit/pull/58933

[EWS]

Committed 307780@main (eff06ddda731): <https://commits.webkit.org/307780@main>

Reviewed commits have been landed. Closing PR #58933 and removing active labels.

[EWS]

Committed 305413.314@safari-7624-branch (28b2950ba6ff): <https://commits.webkit.org/305413.314@safari-7624-branch>

Reviewed commits have been landed. Closing PR #4506 and removing active labels.