<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 scrollbars/custom-scrollbar-appearance-property.html"
href="https://bugs.webkit.org/show_bug.cgi?id=149312">149312</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Null dereference loading Blink layout test scrollbars/custom-scrollbar-appearance-property.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=261450" name="attach_261450" title="crashing test">attachment 261450</a> <a href="attachment.cgi?id=261450&action=edit" title="crashing test">[details]</a></span>
crashing test
Null dereference loading Blink layout test scrollbars/custom-scrollbar-appearance-property.html.
Stack trace:
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000020
Exception Note: EXC_CORPSE_NOTIFY
VM Regions Near 0x20:
-->
__TEXT 000000010889e000-00000001088a0000 [ 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/scrollbars/custom-scrollbar-appearance-property.html
Global Trace Buffer (reverse chronological seconds):
18446744022.906845 CFNetwork 0x00007fff88d43b97 Explicitly setting CF cookie storage singleton
18446744022.907223 CFNetwork 0x00007fff88d8f211 Explicitly setting cookie storage singleton
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 com.apple.WebCore 0x0000000111055bd4 WebCore::Node::shadowHost() const + 4 (Node.h:401)
1 com.apple.WebCore 0x0000000111269526 WebCore::RenderThemeMac::paintSearchFieldResultsDecorationPart(WebCore::RenderObject const&, WebCore::PaintInfo const&, WebCore::IntRect const&) + 54 (RenderThemeMac.mm:1764)
2 com.apple.WebCore 0x000000011125f9e9 WebCore::RenderTheme::paint(WebCore::RenderBox const&, WebCore::ControlStates&, WebCore::PaintInfo const&, WebCore::LayoutRect const&) + 1465 (RenderTheme.cpp:390)
3 com.apple.WebCore 0x000000011111364d WebCore::RenderBox::paintBoxDecorations(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 541 (RenderBox.cpp:1302)
4 com.apple.WebCore 0x00000001110e2845 WebCore::RenderBlock::paintObject(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 277 (RenderBlock.cpp:1554)
5 com.apple.WebCore 0x00000001110e1e86 WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 326 (RenderBlock.cpp:1416)
6 com.apple.WebCore 0x00000001111f2752 WebCore::RenderScrollbarPart::paintIntoRect(WebCore::GraphicsContext&, WebCore::LayoutPoint const&, WebCore::LayoutRect const&) + 802 (RenderScrollbarPart.cpp:180)
7 com.apple.WebCore 0x00000001111f0d03 WebCore::RenderScrollbar::paintPart(WebCore::GraphicsContext&, WebCore::ScrollbarPart, WebCore::IntRect const&) + 515 (RenderScrollbar.cpp:261)
8 com.apple.WebCore 0x00000001111f2c75 WebCore::RenderScrollbarTheme::paintScrollbarBackground(WebCore::GraphicsContext&, WebCore::Scrollbar&) + 53 (RenderScrollbarTheme.cpp:137)
9 com.apple.WebCore 0x00000001112e0f7f WebCore::ScrollbarThemeComposite::paint(WebCore::Scrollbar&, WebCore::GraphicsContext&, WebCore::IntRect const&) + 591 (ScrollbarThemeComposite.cpp:82)
10 com.apple.WebCore 0x00000001112e018a WebCore::Scrollbar::paint(WebCore::GraphicsContext&, WebCore::IntRect const&) + 170 (Scrollbar.cpp:160)
11 com.apple.WebCore 0x000000011118a8da WebCore::RenderLayer::paintOverflowControls(WebCore::GraphicsContext&, WebCore::IntPoint const&, WebCore::IntRect const&, bool) + 378 (RefPtr.h:75)
12 com.apple.WebCore 0x00000001110e20fe WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 958 (RenderBlock.cpp:1424)
13 com.apple.WebCore 0x00000001110e24da WebCore::RenderBlock::paintChild(WebCore::RenderBox&, WebCore::PaintInfo&, WebCore::LayoutPoint const&, WebCore::PaintInfo&, bool, WebCore::RenderBlock::PaintBlockType) + 602 (RenderObject.h:976)
14 com.apple.WebCore 0x00000001110e225f WebCore::RenderBlock::paintChildren(WebCore::PaintInfo&, WebCore::LayoutPoint const&, WebCore::PaintInfo&, bool) + 79 (RenderBlock.cpp:1455)
15 com.apple.WebCore 0x00000001110e2207 WebCore::RenderBlock::paintContents(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 247 (RenderBlock.cpp:1450)
16 com.apple.WebCore 0x00000001110e2956 WebCore::RenderBlock::paintObject(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 550 (RenderObject.h:564)
17 com.apple.WebCore 0x00000001110e1e86 WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 326 (RenderBlock.cpp:1416)
18 com.apple.WebCore 0x00000001110e24da WebCore::RenderBlock::paintChild(WebCore::RenderBox&, WebCore::PaintInfo&, WebCore::LayoutPoint const&, WebCore::PaintInfo&, bool, WebCore::RenderBlock::PaintBlockType) + 602 (RenderObject.h:976)
19 com.apple.WebCore 0x00000001110e225f WebCore::RenderBlock::paintChildren(WebCore::PaintInfo&, WebCore::LayoutPoint const&, WebCore::PaintInfo&, bool) + 79 (RenderBlock.cpp:1455)
20 com.apple.WebCore 0x00000001110e2207 WebCore::RenderBlock::paintContents(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 247 (RenderBlock.cpp:1450)
21 com.apple.WebCore 0x00000001110e2956 WebCore::RenderBlock::paintObject(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 550 (RenderObject.h:564)
22 com.apple.WebCore 0x00000001110e1e86 WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 326 (RenderBlock.cpp:1416)
23 com.apple.WebCore 0x000000011119375a WebCore::RenderLayer::paintForegroundForFragmentsWithPhase(WebCore::PaintPhase, WTF::Vector<WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int, WebCore::RenderObject*) + 394 (RenderLayer.cpp:4735)
24 com.apple.WebCore 0x000000011119138c WebCore::RenderLayer::paintForegroundForFragments(WTF::Vector<WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::GraphicsContext&, WebCore::GraphicsContext&, WebCore::LayoutRect const&, bool, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int, WebCore::RenderObject*, bool) + 380 (RenderLayer.cpp:4696)
25 com.apple.WebCore 0x000000011118e1e0 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int) + 2992 (RenderLayer.cpp:4325)
26 com.apple.WebCore 0x000000011118e328 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int) + 3320 (RenderLayer.cpp:4428)
27 com.apple.WebCore 0x00000001111a48fc WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::IntRect const&, unsigned int, unsigned int) + 524 (RenderLayerBacking.cpp:2308)
28 com.apple.WebCore 0x00000001111a4ba0 WebCore::RenderLayerBacking::paintContents(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, unsigned int, WebCore::FloatRect const&) + 528 (RenderLayerBacking.h:257)
29 com.apple.WebCore 0x0000000110a24dd7 WebCore::GraphicsLayer::paintGraphicsLayerContents(WebCore::GraphicsContext&, WebCore::FloatRect const&) + 135 (GraphicsLayer.cpp:414)
30 com.apple.WebCore 0x0000000111099329 WebCore::PlatformCALayer::drawLayerContents(CGContext*, WebCore::PlatformCALayer*, WTF::Vector<WebCore::FloatRect, 5ul, WTF::CrashOnOverflow, 16ul>&) + 345 (GraphicsContext.h:581)
31 com.apple.WebCore 0x0000000111509bf3 WebCore::TileGrid::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&) + 163 (Vector.h:634)
32 com.apple.WebCore 0x00000001115abafc -[WebSimpleLayer drawInContext:] + 172 (WebLayer.mm:131)
33 com.apple.QuartzCore 0x00007fff937cd839 CABackingStoreUpdate_ + 3494
34 com.apple.QuartzCore 0x00007fff937cca8d ___ZN2CA5Layer8display_Ev_block_invoke + 59
35 com.apple.QuartzCore 0x00007fff937c06e9 CA::Layer::display_() + 1565
36 com.apple.WebCore 0x00000001115aba1b -[WebSimpleLayer display] + 43 (WebLayer.mm:112)
37 com.apple.QuartzCore 0x00007fff937beac5 CA::Layer::display_if_needed(CA::Transaction*) + 603
38 com.apple.QuartzCore 0x00007fff937be145 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 35
39 com.apple.QuartzCore 0x00007fff937bd6a9 CA::Context::commit_transaction(CA::Transaction*) + 277
40 com.apple.QuartzCore 0x00007fff937bd3dc CA::Transaction::commit() + 508
41 com.apple.WebKit 0x000000010ee22864 WebKit::TiledCoreAnimationDrawingArea::forceRepaint() + 152 (TiledCoreAnimationDrawingArea.mm:149)
42 WebKitTestRunnerInjectedBundle 0x0000000112c7875e WTR::InjectedBundlePage::dump() + 50 (InjectedBundlePage.cpp:853)
43 com.apple.WebKit 0x000000010ed5de5e WebKit::InjectedBundlePageLoaderClient::didFinishLoadForFrame(WebKit::WebPage*, WebKit::WebFrame*, WTF::RefPtr<API::Object>&) + 76 (InjectedBundlePageLoaderClient.cpp:146)
44 com.apple.WebKit 0x000000010ee84126 WebKit::WebFrameLoaderClient::dispatchDidFinishLoad() + 72 (WebFrameLoaderClient.cpp:553)
45 com.apple.WebCore 0x00000001109d0ad2 WebCore::FrameLoader::checkLoadCompleteForThisFrame() + 594 (FrameLoader.cpp:2286)
46 com.apple.WebCore 0x00000001109c73b6 WebCore::FrameLoader::checkLoadComplete() + 438 (FrameLoader.cpp:2465)
47 com.apple.WebCore 0x000000011085da80 WebCore::DocumentLoader::finishedLoading(double) + 416 (DocumentLoader.cpp:439)
48 com.apple.WebCore 0x000000011068e179 WebCore::CachedResource::checkNotify() + 153 (CachedResourceClientWalker.h:51)
49 com.apple.WebCore 0x000000011068a433 WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) + 227 (CachedRawResource.cpp:104)
50 com.apple.WebCore 0x0000000111405501 WebCore::SubresourceLoader::didFinishLoading(double) + 1153 (ResourceLoader.h:154)
51 com.apple.WebKit 0x000000010ef4b98d WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::MessageDecoder&) + 561 (HandleMessage.h:16)
52 com.apple.WebKit 0x000000010ed251f1 IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::MessageDecoder, std::__1::default_delete<IPC::MessageDecoder> >) + 127 (memory:2636)
53 com.apple.WebKit 0x000000010ed27b4a IPC::Connection::dispatchOneMessage() + 126 (memory:2656)
54 com.apple.JavaScriptCore 0x0000000110169985 WTF::RunLoop::performWork() + 437 (functional:1742)
55 com.apple.JavaScriptCore 0x0000000110169d32 WTF::RunLoop::performWork(void*) + 34 (RunLoopCF.cpp:39)
56 com.apple.CoreFoundation 0x00007fff949e2c01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
57 com.apple.CoreFoundation 0x00007fff949d4b1c __CFRunLoopDoSources0 + 556
58 com.apple.CoreFoundation 0x00007fff949d403f __CFRunLoopRun + 927
59 com.apple.CoreFoundation 0x00007fff949d3a38 CFRunLoopRunSpecific + 296
60 com.apple.HIToolbox 0x00007fff88e673bd RunCurrentEventLoopInMode + 235
61 com.apple.HIToolbox 0x00007fff88e67153 ReceiveNextEventCommon + 432
62 com.apple.HIToolbox 0x00007fff88e66f93 _BlockUntilNextEventMatchingListInModeWithFilter + 71
63 com.apple.AppKit 0x00007fff870b81e7 _DPSNextEvent + 1076
64 com.apple.AppKit 0x00007fff8748490d -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
65 com.apple.AppKit 0x00007fff870ae0b8 -[NSApplication run] + 682
66 com.apple.AppKit 0x00007fff87030396 NSApplicationMain + 1176
67 libxpc.dylib 0x00007fff8c70ff70 _xpc_objc_main + 793
68 libxpc.dylib 0x00007fff8c7116bf xpc_main + 494
69 com.apple.WebKit.WebContent.Development 0x000000010889f424 main + 409 (XPCServiceMain.Development.mm:187)
70 libdyld.dylib 0x00007fff93aa15ad start + 1</pre>
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