<html>
<head>
<base href="https://bugs.webkit.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Null dereference loading Blink layout test fast/css/zoom-on-nested-scroll-crash.html"
href="https://bugs.webkit.org/show_bug.cgi?id=149302">149302</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Null dereference loading Blink layout test fast/css/zoom-on-nested-scroll-crash.html
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>WebKit Nightly Build
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Keywords</th>
<td>BlinkMergeCandidate, HasReduction, NeedsRadar
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>Layout and Rendering
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jhoneycutt@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>webkit-bug-importer@group.apple.com
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=261436" name="attach_261436" title="crashing test">attachment 261436</a> <a href="attachment.cgi?id=261436&action=edit" title="crashing test">[details]</a></span>
crashing test
Null dereference loading Blink layout test fast/css/zoom-on-nested-scroll-crash.html.
Stack trace:
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000028
Exception Note: EXC_CORPSE_NOTIFY
VM Regions Near 0x28:
-->
__TEXT 000000010bcc8000-000000010bcca000 [ 8K] r-x/rwx SM=COW /Users/USER/*/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.Development.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development
Application Specific Information:
CRASHING TEST: temp-tests/fast/css/zoom-on-nested-scroll-crash.html
Global Trace Buffer (reverse chronological seconds):
57.772360 CFNetwork 0x00007fff88d43b97 Explicitly setting CF cookie storage singleton
57.772701 CFNetwork 0x00007fff88d8f211 Explicitly setting cookie storage singleton
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 com.apple.WebCore 0x000000011450e98b WebCore::RenderBox::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) + 491 (IntPoint.h:69)
1 com.apple.WebCore 0x00000001144de4a1 WebCore::RenderBlock::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) + 145 (RenderObject.h:970)
2 com.apple.WebCore 0x00000001145f2348 WebCore::RenderScrollbarPart::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) + 24 (RenderObject.h:969)
3 com.apple.WebCore 0x0000000114540692 WebCore::RenderElement::setStyle(WTF::Ref<WebCore::RenderStyle>&&, WebCore::StyleDifference) + 594 (RenderElement.h:66)
4 com.apple.WebCore 0x00000001145f0191 WebCore::RenderScrollbar::updateScrollbarPart(WebCore::ScrollbarPart) + 353 (Ref.h:55)
5 com.apple.WebCore 0x00000001145f061e WebCore::RenderScrollbar::updateScrollbarParts() + 30 (RenderScrollbar.cpp:159)
6 com.apple.WebCore 0x0000000114599c09 WebCore::RenderLayer::styleChanged(WebCore::StyleDifference, WebCore::RenderStyle const*) + 985 (RefPtr.h:75)
7 com.apple.WebCore 0x00000001145b3f8e WebCore::RenderLayerModelObject::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) + 542 (RenderLayerModelObject.cpp:160)
8 com.apple.WebCore 0x000000011450e7c2 WebCore::RenderBox::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) + 34 (Ref.h:120)
9 com.apple.WebCore 0x00000001144de4a1 WebCore::RenderBlock::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) + 145 (RenderObject.h:970)
10 com.apple.WebCore 0x00000001144fb49c WebCore::RenderBlockFlow::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) + 28 (RenderObject.h:958)
11 com.apple.WebCore 0x0000000114540692 WebCore::RenderElement::setStyle(WTF::Ref<WebCore::RenderStyle>&&, WebCore::StyleDifference) + 594 (RenderElement.h:66)
12 com.apple.WebCore 0x00000001147f95cf WebCore::Style::resolveTree(WebCore::Element&, WebCore::RenderStyle&, WebCore::RenderTreePosition&, WebCore::Style::Change) + 1711 (Ref.h:55)
13 com.apple.WebCore 0x00000001147f99c2 WebCore::Style::resolveTree(WebCore::Element&, WebCore::RenderStyle&, WebCore::RenderTreePosition&, WebCore::Style::Change) + 2722 (StyleResolveTree.cpp:827)
14 com.apple.WebCore 0x00000001147f99c2 WebCore::Style::resolveTree(WebCore::Element&, WebCore::RenderStyle&, WebCore::RenderTreePosition&, WebCore::Style::Change) + 2722 (StyleResolveTree.cpp:827)
15 com.apple.WebCore 0x00000001147f8f10 WebCore::Style::resolveTree(WebCore::Document&, WebCore::Style::Change) + 336 (StyleResolveTree.cpp:867)
16 com.apple.WebCore 0x0000000113c39f7d WebCore::Document::recalcStyle(WebCore::Style::Change) + 285 (Document.cpp:1864)
17 com.apple.WebCore 0x0000000113c45275 WebCore::Document::finishedParsing() + 405 (Frame.h:327)
18 com.apple.WebCore 0x0000000113e71e05 WebCore::HTMLDocumentParser::prepareToStopParsing() + 165 (RefCounted.h:99)
19 com.apple.WebCore 0x0000000113c7569a WebCore::DocumentWriter::end() + 58 (StdLibExtras.h:366)
20 com.apple.WebCore 0x0000000113c5d9ec WebCore::DocumentLoader::finishedLoading(double) + 268 (ResourceErrorBase.h:42)
21 com.apple.WebCore 0x0000000113a8e179 WebCore::CachedResource::checkNotify() + 153 (CachedResourceClientWalker.h:51)
22 com.apple.WebCore 0x0000000113a8a433 WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) + 227 (CachedRawResource.cpp:104)
23 com.apple.WebCore 0x0000000114805501 WebCore::SubresourceLoader::didFinishLoading(double) + 1153 (ResourceLoader.h:154)
24 com.apple.WebKit 0x000000011234b98d WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::MessageDecoder&) + 561 (HandleMessage.h:16)
25 com.apple.WebKit 0x00000001121251f1 IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::MessageDecoder, std::__1::default_delete<IPC::MessageDecoder> >) + 127 (memory:2636)
26 com.apple.WebKit 0x0000000112127b4a IPC::Connection::dispatchOneMessage() + 126 (memory:2656)
27 com.apple.JavaScriptCore 0x0000000113569985 WTF::RunLoop::performWork() + 437 (functional:1742)
28 com.apple.JavaScriptCore 0x0000000113569d32 WTF::RunLoop::performWork(void*) + 34 (RunLoopCF.cpp:39)
29 com.apple.CoreFoundation 0x00007fff949e2c01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
30 com.apple.CoreFoundation 0x00007fff949d4b1c __CFRunLoopDoSources0 + 556
31 com.apple.CoreFoundation 0x00007fff949d403f __CFRunLoopRun + 927
32 com.apple.CoreFoundation 0x00007fff949d3a38 CFRunLoopRunSpecific + 296
33 com.apple.HIToolbox 0x00007fff88e673bd RunCurrentEventLoopInMode + 235
34 com.apple.HIToolbox 0x00007fff88e67153 ReceiveNextEventCommon + 432
35 com.apple.HIToolbox 0x00007fff88e66f93 _BlockUntilNextEventMatchingListInModeWithFilter + 71
36 com.apple.AppKit 0x00007fff870b81e7 _DPSNextEvent + 1076
37 com.apple.AppKit 0x00007fff8748490d -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
38 com.apple.AppKit 0x00007fff870ae0b8 -[NSApplication run] + 682
39 com.apple.AppKit 0x00007fff87030396 NSApplicationMain + 1176
40 libxpc.dylib 0x00007fff8c70ff70 _xpc_objc_main + 793
41 libxpc.dylib 0x00007fff8c7116bf xpc_main + 494
42 com.apple.WebKit.WebContent.Development 0x000000010bcc9424 main + 409 (XPCServiceMain.Development.mm:187)
43 libdyld.dylib 0x00007fff93aa15ad start + 1</pre>
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