Bug 187802 – ASSERTION !data.customElementReactionQueue() when creating custom element inside an SVG document

• Component: DOM
• Status: RESOLVED FIXED

[Frédéric Wang (:fredw)]

Created attachment 345347 [details]
Minimal crash test

See the attached testcase.

#0  0x00007fcdb471cacc in WTFCrash ()
    at ../../Source/WTF/wtf/Assertions.cpp:267
#1  0x00007fcdc015af34 in (anonymous namespace)::Element::enqueueToUpgrade (
    this=0x7fcd2e000068, elementInterface=...)
    at ../../Source/WebCore/dom/Element.cpp:2010
#2  0x00007fcdc00973c3 in (anonymous namespace)::CustomElementReactionQueue::enqueueElementUpgradeIfDefined (element=...)
    at ../../Source/WebCore/dom/CustomElementReactionQueue.cpp:139
#3  0x00007fcdc0159cd1 in (anonymous namespace)::Element::insertedIntoAncestor
    (this=0x7fcd2e000068, insertionType=..., parentOfInsertedTree=...)
    at ../../Source/WebCore/dom/Element.cpp:1751
#4  0x00007fcdc0095e14 in (anonymous namespace)::notifyNodeInsertedIntoDocument
    (parentOfInsertedTree=..., node=..., 
    treeScopeChange=(anonymous namespace)::TreeScopeChange::Changed, 
    postInsertionNotificationTargets=...)
    at ../../Source/WebCore/dom/ContainerNodeAlgorithms.cpp:48
#5  0x00007fcdc00962df in (anonymous namespace)::notifyChildNodeInserted (
    parentOfInsertedTree=..., node=...)
    at ../../Source/WebCore/dom/ContainerNodeAlgorithms.cpp:103
#6  0x00007fcdc0098b65 in (anonymous namespace)::executeNodeInsertionWithScriptAssertion<WebCore::ContainerNode::parserAppendChild(WebCore::Node&)::<lambda()> >((anonymous namespace)::ContainerNode &, (anonymous namespace)::Node &, (anonymous namespace)::ContainerNode::ChildChangeSource, (anonymous namespace)::ReplacedAllChildren, (anonymous namespace)::ContainerNode::<lambda()>) (
    containerNode=..., child=..., 
    source=(anonymous namespace)::ContainerNode::ChildChangeSource::Parser, 
    replacedAllChildren=(anonymous namespace)::ReplacedAllChildren::No, 
    doNodeInsertion=...) at ../../Source/WebCore/dom/ContainerNode.cpp:186
#7  0x00007fcdc0094bf9 in (anonymous namespace)::ContainerNode::parserAppendChild (this=0x7fcd2e8001d0, newChild=...)
    at ../../Source/WebCore/dom/ContainerNode.cpp:723
#8  0x00007fcdc12e28b0 in (anonymous namespace)::XMLDocumentParser::startElementNs (this=0x7fcd30fd8b40, xmlLocalName=0x559de8bdce9a "my-element", 
    xmlPrefix=0x0, xmlURI=0x559de8bdce76 "http://www.w3.org/1999/xhtml", 
    numNamespaces=0, libxmlNamespaces=0x0, numAttributes=0, numDefaulted=0,

[Frédéric Wang (:fredw)]

Created attachment 345567 [details]
Patch

[Frédéric Wang (:fredw)]

Comment on attachment 345567 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=345567&action=review

> Source/WebCore/xml/parser/XMLDocumentParserLibxml2.cpp:787
> +    if (!m_parsingFragment)

Step 5 actually says it should happen if in addition the custom element definition is non-null (which is true in the repro case).

[Frédéric Wang (:fredw)]

Created attachment 346067 [details]
Patch

[Frédéric Wang (:fredw)]

Created attachment 346070 [details]
Patch

[Frédéric Wang (:fredw)]

Comment on attachment 346070 [details]
Patch

Will handle the custom element reaction stack push/pop in a separate bug.

[Radar WebKit Bug Importer]

<rdar://problem/42843015>

[Frédéric Wang (:fredw)]

ASSERTION has been removed in bug 188327 so I think we can just unskip the test now. However, the same logic as bug 188327 (special case for HTML fragment parsing) probably still needs to be implemented for the XML parser.

[Frédéric Wang (:fredw)]

Created attachment 346613 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 346613 [details]
Patch

Clearing flags on attachment: 346613

Committed r234591: <https://trac.webkit.org/changeset/234591>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.