200083 2019-07-24 09:54:54 -0700 REGRESSION (r244995): Assertion failure when addEventListener to an SVGElement which has an. instance in shadow tree 2019-07-25 10:56:53 -0700 1 1 1 Unclassified WebKit SVG WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 sabouhallawa sabouhallawa commit-queue rniwa simon.fraser webkit-bug-importer zimmermann oldest_to_newest 1555379 0 374784 sabouhallawa 2019-07-24 09:54:54 -0700 Created attachment 374784 test case Open the attached test case. The following assertion will fire in debug builds: 0x000000012208cbde in ::WTFCrash() 0x000000010a37a9fb in WTFCrashWithInfo(int, char const*, char const*, int) 0x000000010c3d5df4 in WebCore::JSLazyEventListener::checkValidityForEventTarget(WebCore::EventTarget&) 0x000000010c9bd339 in WebCore::EventTarget::addEventListener(WTF::AtomString const&, WTF::Ref<WebCore::EventListener, WTF::DumbPtrTraits<WebCore::EventListener> >&&, WebCore::EventTarget::AddEventListenerOptions const&) 0x000000010ca2c09d in WebCore::tryAddEventListener(WebCore::Node*, WTF::AtomString const&, WTF::Ref<WebCore::EventListener, WTF::DumbPtrTraits<WebCore::EventListener> >&&, WebCore::EventTarget::AddEventListenerOptions const&) 0x000000010ca2c038 in WebCore::Node::addEventListener(WTF::AtomString const&, WTF::Ref<WebCore::EventListener, WTF::DumbPtrTraits<WebCore::EventListener> >&&, WebCore::EventTarget::AddEventListenerOptions const&) 0x000000010e01f1bf in WebCore::SVGElement::addEventListener(WTF::AtomString const&, WTF::Ref<WebCore::EventListener, WTF::DumbPtrTraits<WebCore::EventListener> >&&, WebCore::EventTarget::AddEventListenerOptions const&) 0x000000010c9bdfb7 in WebCore::EventTarget::setAttributeEventListener(WTF::AtomString const&, WTF::RefPtr<WebCore::EventListener, WTF::DumbPtrTraits<WebCore::EventListener> >&&, WebCore::DOMWrapperWorld&) 0x000000010c975d26 in WebCore::Element::setAttributeEventListener(WTF::AtomString const&, WebCore::QualifiedName const&, WTF::AtomString const&) 0x000000010e01edf5 in WebCore::SVGElement::parseAttribute(WebCore::QualifiedName const&, WTF::AtomString const&) 0x000000010e15eea0 in WebCore::SVGGraphicsElement::parseAttribute(WebCore::QualifiedName const&, WTF::AtomString const&) 0x000000010e2af04f in WebCore::SVGUseElement::parseAttribute(WebCore::QualifiedName const&, WTF::AtomString const&) 0x000000010c9712cd in WebCore::Element::attributeChanged(WebCore::QualifiedName const&, WTF::AtomString const&, WTF::AtomString const&, WebCore::Element::AttributeModificationReason) 0x000000010cac1e0c in WebCore::StyledElement::attributeChanged(WebCore::QualifiedName const&, WTF::AtomString const&, WTF::AtomString const&, WebCore::Element::AttributeModificationReason) 0x000000010e01fafb in WebCore::SVGElement::attributeChanged(WebCore::QualifiedName const&, WTF::AtomString const&, WTF::AtomString const&, WebCore::Element::AttributeModificationReason) 0x000000010c977702 in WebCore::Element::didAddAttribute(WebCore::QualifiedName const&, WTF::AtomString const&) 0x000000010c977643 in WebCore::Element::addAttributeInternal(WebCore::QualifiedName const&, WTF::AtomString const&, WebCore::Element::SynchronizationOfLazyAttribute) 0x000000010c970a71 in WebCore::Element::setAttributeInternal(unsigned int, WebCore::QualifiedName const&, WTF::AtomString const&, WebCore::Element::SynchronizationOfLazyAttribute) 0x000000010c970d2e in WebCore::Element::setAttribute(WTF::AtomString const&, WTF::AtomString const&) 1555400 1 374787 sabouhallawa 2019-07-24 10:26:49 -0700 Created attachment 374787 Patch 1555401 2 webkit-bug-importer 2019-07-24 10:27:39 -0700 <rdar://problem/53502472> 1555426 3 374787 rniwa 2019-07-24 11:06:23 -0700 Comment on attachment 374787 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=374787&action=review > Source/WebCore/bindings/js/JSLazyEventListener.cpp:89 > + ASSERT(m_originalNode.get() == &node || !m_originalNode->isInShadowTree() && node.isInShadowTree()); This assertion isn’t quite right. We need to restrict it to the shadow tree of SVG use element instead. 1555439 4 374787 sabouhallawa 2019-07-24 11:26:01 -0700 Comment on attachment 374787 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=374787&action=review >> Source/WebCore/bindings/js/JSLazyEventListener.cpp:89 >> + ASSERT(m_originalNode.get() == &node || !m_originalNode->isInShadowTree() && node.isInShadowTree()); > > This assertion isn’t quite right. We need to restrict it to the shadow tree of SVG use element instead. Why it is not quite right? What is the case that you want to catch and the new assertion is going to hide it? Is there a possibility that you addEventListener() to a node in a shadow tree without having to add the same event listener to its source node? Please explain this case so I can add a test case for it. 1555465 5 rniwa 2019-07-24 13:12:18 -0700 (In reply to Said Abou-Hallawa from comment #4) > Comment on attachment 374787 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=374787&action=review > > >> Source/WebCore/bindings/js/JSLazyEventListener.cpp:89 > >> + ASSERT(m_originalNode.get() == &node || !m_originalNode->isInShadowTree() && node.isInShadowTree()); > > > > This assertion isn’t quite right. We need to restrict it to the shadow tree of SVG use element instead. > > Why it is not quite right? What is the case that you want to catch and the > new assertion is going to hide it? Is there a possibility that you > addEventListener() to a node in a shadow tree without having to add the same > event listener to its source node? Please explain this case so I can add a > test case for it. Yes. Note that shadow DOM is a Web exposed API. Anyone can add an event listener anywhere. SVG use element is a very special case, and we shouldn't be weakening this assertion for all other event listeners in the shadow tress just for SVG use element. 1555554 6 374827 sabouhallawa 2019-07-24 16:25:42 -0700 Created attachment 374827 Patch 1555560 7 374827 rniwa 2019-07-24 16:35:03 -0700 Comment on attachment 374827 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=374827&action=review > Source/WebCore/bindings/js/JSLazyEventListener.cpp:98 > + if (is<SVGElement>(node)) { > + auto& element = downcast<SVGElement>(node); > + > + if (element.correspondingElement()) { We shouldn't be running this code in release builds when the assertion is disabled. I suggest we wrap this into an inline helper function instead. e.g. isCloneInShadowTreeOfSVGUseElement 1555586 8 374837 sabouhallawa 2019-07-24 17:18:39 -0700 Created attachment 374837 Patch 1555839 9 374837 commit-queue 2019-07-25 10:56:52 -0700 Comment on attachment 374837 Patch Clearing flags on attachment: 374837 Committed r247826: <https://trac.webkit.org/changeset/247826> 1555840 10 commit-queue 2019-07-25 10:56:53 -0700 All reviewed patches have been landed. Closing bug. 374784 2019-07-24 09:54:54 -0700 2019-07-24 09:54:54 -0700 test case add-event-listener-shadow-tree-element.html text/html 540 sabouhallawa PGh0bWw+Cjxib2R5IG9ubG9hZD10ZXN0KCk+CiAgIDxzdmc+CiAgICAgICAgPGRlZj4KICAgICAg ICAgICAgPHJlY3QgaWQ9InJlY3QiIHdpZHRoPSIxMDAiIGhlaWdodD0iMTAwIiBmaWxsPSJyZWQi Lz4KICAgICAgICA8L2RlZj4KICAgICAgICA8dXNlIGlkPSJ1c2UxIiB3aWR0aD0iMTAwIiBoZWln aHQ9IjEwMCIgeGxpbms6aHJlZj0iI3JlY3QiLz4KICAgICAgICA8dXNlIGlkPSJ1c2UyIiB3aWR0 aD0iMTAwIiBoZWlnaHQ9IjEwMCIgeGxpbms6aHJlZj0iI3VzZTEiLz4KICAgIDwvc3ZnPgogICAg PHNjcmlwdD4KICAgICAgICBmdW5jdGlvbiBldmVudGhhbmRsZXIoKSB7CiAgICAgICAgICAgIHJl Y3Quc2V0QXR0cmlidXRlKCJmaWxsIiwgImdyZWVuIik7CiAgICAgICAgfQogICAgICAgIGZ1bmN0 aW9uIHRlc3QoKSB7CiAgICAgICAgICAgIHVzZTEuc2V0QXR0cmlidXRlKCJvbmZvY3VzaW4iLCAi ZXZlbnRoYW5kbGVyKCkiKTsKICAgICAgICAgICAgdXNlMS5mb2N1cygpOwogICAgICAgIH0KICAg IDwvc2NyaXB0Pgo8L2JvZHk+CjwvaHRtbD4K 374787 2019-07-24 10:26:49 -0700 2019-07-24 16:25:41 -0700 Patch bug-200083-20190724102648.patch text/plain 4495 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