<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>246890</bug_id>
          
          <creation_ts>2022-10-21 16:03:14 -0700</creation_ts>
          <short_desc>Fix assertion failure due to viewport anchor layer not being updated when updating style</short_desc>
          <delta_ts>2022-10-26 10:24:46 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>Layout and Rendering</component>
          <version>WebKit Local Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Arunsundar Kannan">arunsundar_kannan</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>bfulgham</cc>
    
    <cc>simon.fraser</cc>
    
    <cc>webkit-bug-importer</cc>
    
    <cc>zalan</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1907456</commentid>
    <comment_count>0</comment_count>
    <who name="Arunsundar Kannan">arunsundar_kannan</who>
    <bug_when>2022-10-21 16:03:14 -0700</bug_when>
    <thetext>Test case: 

&lt;!DOCTYPE html&gt;
&lt;style&gt;
  body {
    rotate: y 1turn;
  }
&lt;/style&gt;
&lt;script&gt;
  onload = () =&gt; {
    document.body.offsetTop;
    document.body.style.position = &apos;sticky&apos;;
    scrollBy(0, 0);
  };
&lt;/script&gt; 



ASSERTION FAILED: layer.backing()-&gt;viewportAnchorLayer()
rendering/RenderLayerCompositor.cpp(4770) : WebCore::ScrollingNodeID WebCore::RenderLayerCompositor::updateScrollingNodeForViewportConstrainedRole(WebCore::RenderLayer &amp;, WebCore::ScrollingTreeState &amp;, OptionSet&lt;WebCore::RenderLayerCompositor::ScrollingNodeChangeFlags&gt;)
1   0x280007be0 WTFCrash
2   0x2b7e5d668 WebCore::JSANGLEInstancedArrays::createPrototype(JSC::VM&amp;, WebCore::JSDOMGlobalObject&amp;)
3   0x2c45ce860 WebCore::RenderLayerCompositor::updateScrollingNodeForViewportConstrainedRole(WebCore::RenderLayer&amp;, WebCore::ScrollingTreeState&amp;, WTF::OptionSet&lt;WebCore::RenderLayerCompositor::ScrollingNodeChangeFlags&gt;)
4   0x2c45ac2f4 WebCore::RenderLayerCompositor::updateScrollCoordinationForLayer(WebCore::RenderLayer&amp;, WebCore::RenderLayer const*, WebCore::ScrollingTreeState&amp;, WTF::OptionSet&lt;WebCore::RenderLayerCompositor::ScrollingNodeChangeFlags&gt;)
5   0x2c45a0ca4 WebCore::RenderLayerCompositor::updateBackingAndHierarchy(WebCore::RenderLayer&amp;, WTF::Vector&lt;WTF::Ref&lt;WebCore::GraphicsLayer, WTF::RawPtrTraits&lt;WebCore::GraphicsLayer&gt; &gt;, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc&gt;&amp;, WebCore::RenderLayerCompositor::UpdateBackingTraversalState&amp;, WebCore::ScrollingTreeState&amp;, WTF::OptionSet&lt;WebCore::RenderLayerCompositor::UpdateLevel&gt;)
6   0x2c45a15d4 WebCore::RenderLayerCompositor::updateBackingAndHierarchy(WebCore::RenderLayer&amp;, WTF::Vector&lt;WTF::Ref&lt;WebCore::GraphicsLayer, WTF::RawPtrTraits&lt;WebCore::GraphicsLayer&gt; &gt;, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc&gt;&amp;, WebCore::RenderLayerCompositor::UpdateBackingTraversalState&amp;, WebCore::ScrollingTreeState&amp;, WTF::OptionSet&lt;WebCore::RenderLayerCompositor::UpdateLevel&gt;)
7   0x2c45a15d4 WebCore::RenderLayerCompositor::updateBackingAndHierarchy(WebCore::RenderLayer&amp;, WTF::Vector&lt;WTF::Ref&lt;WebCore::GraphicsLayer, WTF::RawPtrTraits&lt;WebCore::GraphicsLayer&gt; &gt;, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc&gt;&amp;, WebCore::RenderLayerCompositor::UpdateBackingTraversalState&amp;, WebCore::ScrollingTreeState&amp;, WTF::OptionSet&lt;WebCore::RenderLayerCompositor::UpdateLevel&gt;)
8   0x2c459844c WebCore::RenderLayerCompositor::updateCompositingLayers(WebCore::CompositingUpdateType, WebCore::RenderLayer*)
9   0x2c266e998 WebCore::FrameView::updateCompositingLayersAfterLayout()
10  0x2c2679628 WebCore::FrameView::didLayout(WTF::WeakPtr&lt;WebCore::RenderElement, WTF::DefaultWeakPtrImpl&gt;)
11  0x2c272483c WebCore::FrameViewLayoutContext::performLayout()
12  0x2c27235b0 WebCore::FrameViewLayoutContext::layout()
13  0x2c0367c90 WebCore::Document::updateLayout()
14  0x2c036b810 WebCore::Document::updateLayoutIgnorePendingStylesheets(WebCore::Document::RunPostLayoutTasks)
15  0x2c253921c WebCore::DOMWindow::scrollBy(WebCore::ScrollToOptions const&amp;) const
16  0x2c2538fa4 WebCore::DOMWindow::scrollBy(double, double) const
17  0x2b8bee430 WebCore::jsDOMWindowInstanceFunction_scrollBy2Body(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSDOMWindow*)::&apos;lambda&apos;()::operator()() const
18  0x2b8bee200 JSC::JSValue WebCore::toJS&lt;WebCore::IDLUndefined, WebCore::jsDOMWindowInstanceFunction_scrollBy2Body(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSDOMWindow*)::&apos;lambda&apos;()&gt;(JSC::JSGlobalObject&amp;, JSC::ThrowScope&amp;, WebCore::jsDOMWindowInstanceFunction_scrollBy2Body(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSDOMWindow*)::&apos;lambda&apos;()&amp;&amp;)
19  0x2b8bedc2c WebCore::jsDOMWindowInstanceFunction_scrollBy2Body(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSDOMWindow*)
20  0x2b8becc24 WebCore::jsDOMWindowInstanceFunction_scrollByOverloadDispatcher(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSDOMWindow*)
21  0x2b8bec6a0 long long WebCore::IDLOperation&lt;WebCore::JSDOMWindow&gt;::call&lt;&amp;(WebCore::jsDOMWindowInstanceFunction_scrollByOverloadDispatcher(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::JSDOMWindow*)), (WebCore::CastedThisErrorBehavior)0&gt;(JSC::JSGlobalObject&amp;, JSC::CallFrame&amp;, char const*)
22  0x2b8bc0018 WebCore::jsDOMWindowInstanceFunction_scrollBy(JSC::JSGlobalObject*, JSC::CallFrame*)
23  0x13cf78044 (null)
24  0x13cf68248 (null)
25  0x13cf68848 (null)
26  0x288e9f154 JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
27  0x2876d348c JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;)
28  0x288229dc4 JSC::call(JSC::JSGlobalObject*, JSC::JSValue, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;)
29  0x28822a27c JSC::call(JSC::JSGlobalObject*, JSC::JSValue, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;, WTF::NakedPtr&lt;JSC::Exception&gt;&amp;)
30  0x28822ad50 JSC::profiledCall(JSC::JSGlobalObject*, JSC::ProfilingReason, JSC::JSValue, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;, WTF::NakedPtr&lt;JSC::Exception&gt;&amp;)
31  0x2bee0fb00 WebCore::JSExecState::profiledCall(JSC::JSGlobalObject*, JSC::ProfilingReason, JSC::JSValue, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;, WTF::NakedPtr&lt;JSC::Exception&gt;&amp;)</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1907458</commentid>
    <comment_count>1</comment_count>
    <who name="Arunsundar Kannan">arunsundar_kannan</who>
    <bug_when>2022-10-21 16:09:34 -0700</bug_when>
    <thetext>&lt;rdar://problem/99568474&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1907459</commentid>
    <comment_count>2</comment_count>
    <who name="Arunsundar Kannan">arunsundar_kannan</who>
    <bug_when>2022-10-21 16:09:51 -0700</bug_when>
    <thetext>Pull request: https://github.com/WebKit/WebKit/pull/5658</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1908469</commentid>
    <comment_count>3</comment_count>
    <who name="EWS">ews-feeder</who>
    <bug_when>2022-10-26 10:24:43 -0700</bug_when>
    <thetext>Committed 256025@main (67c0ccbbabbd): &lt;https://commits.webkit.org/256025@main&gt;

Reviewed commits have been landed. Closing PR #5658 and removing active labels.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>