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<base href="https://bugs.webkit.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ASSERTION FAILED: m_stack.isEmpty() in WebCore::GraphicsContext::~GraphicsContext"
href="https://bugs.webkit.org/show_bug.cgi?id=164083">164083</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>ASSERTION FAILED: m_stack.isEmpty() in WebCore::GraphicsContext::~GraphicsContext
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>WebKit Local 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>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>WebCore Misc.
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hodovan@inf.u-szeged.hu
</td>
</tr></table>
<p>
<div>
<pre>Load the attached test with debug WebKitTestRunner:
Checked version: 2c9fa6e
OS: Darwin-15.6.0-x86_64-i386-64bit
<style>body{background-attachment:fixed</style><style>*{-webkit-box-reflect:below 2 none;mix-blend-mode:soft-light</style><body background=w>
Backtrace:
ASSERTION FAILED: m_stack.isEmpty()
WebKit/Source/WebCore/platform/graphics/GraphicsContext.cpp(341) : WebCore::GraphicsContext::~GraphicsContext()
1 0x10e77d4f1 WTFCrash
2 0x114645715 WebCore::GraphicsContext::~GraphicsContext()
3 0x114645805 WebCore::GraphicsContext::~GraphicsContext()
4 0x1175bd8c3 WebCore::PlatformCALayer::drawLayerContents(CGContext*, WebCore::PlatformCALayer*, WTF::Vector<WebCore::FloatRect, 5ul, WTF::CrashOnOverflow, 16ul>&)
5 0x1194f8ee4 -[WebLayer drawInContext:]
6 0x7fff85a28b19 CABackingStoreUpdate_
7 0x7fff85a27d6d invocation function for block in CA::Layer::display_()
8 0x7fff85a27759 CA::Layer::display_()
9 0x1194f9fa9 -[WebSimpleLayer display]
10 0x7fff85a194a5 CA::Layer::display_if_needed(CA::Transaction*)
11 0x7fff85a18fcd CA::Layer::layout_and_display_if_needed(CA::Transaction*)
12 0x7fff85a184a1 CA::Context::commit_transaction(CA::Transaction*)
13 0x7fff85a180ec CA::Transaction::commit()
14 0x7fff85a23977 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*)
15 0x7fff81c1f067 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
16 0x7fff81c1efd7 __CFRunLoopDoObservers
17 0x7fff81bfdef8 CFRunLoopRunSpecific
18 0x7fff82fde935 RunCurrentEventLoopInMode
19 0x7fff82fde76f ReceiveNextEventCommon
20 0x7fff82fde5af _BlockUntilNextEventMatchingListInModeWithFilter
21 0x7fff8e643df6 _DPSNextEvent
22 0x7fff8e643226 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:]
23 0x7fff8e637d80 -[NSApplication run]
24 0x7fff8e601368 NSApplicationMain
25 0x7fff92f09194 _xpc_objc_main
26 0x7fff92f07bbe xpc_main
27 0x104ecbf74 main
28 0x7fff8ab8d5ad start
29 0x1
ASAN:DEADLYSIGNAL
=================================================================
==2377==ERROR: AddressSanitizer: SEGV on unknown address 0x0000bbadbeef (pc 0x00010e77d529 bp 0x7fff5ad32f20 sp 0x7fff5ad32f10 T0)
#0 0x10e77d528 in WTFCrash (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2d01528)
#1 0x114645714 in WebCore::GraphicsContext::~GraphicsContext() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1c33714)
#2 0x114645804 in WebCore::GraphicsContext::~GraphicsContext() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1c33804)
#3 0x1175bd8c2 in WebCore::PlatformCALayer::drawLayerContents(CGContext*, WebCore::PlatformCALayer*, WTF::Vector<WebCore::FloatRect, 5ul, WTF::CrashOnOverflow, 16ul>&) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4bab8c2)
#4 0x1194f8ee3 in -[WebLayer drawInContext:] (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x6ae6ee3)
#5 0x7fff85a28b18 in CABackingStoreUpdate_ (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore+0x20b18)
#6 0x7fff85a27d6c in invocation function for block in CA::Layer::display_() (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore+0x1fd6c)
#7 0x7fff85a27758 in CA::Layer::display_() (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore+0x1f758)
#8 0x1194f9fa8 in -[WebSimpleLayer display] (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x6ae7fa8)
#9 0x7fff85a194a4 in CA::Layer::display_if_needed(CA::Transaction*) (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore+0x114a4)
#10 0x7fff85a18fcc in CA::Layer::layout_and_display_if_needed(CA::Transaction*) (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore+0x10fcc)
#11 0x7fff85a184a0 in CA::Context::commit_transaction(CA::Transaction*) (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore+0x104a0)
#12 0x7fff85a180eb in CA::Transaction::commit() (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore+0x100eb)
#13 0x7fff85a23976 in CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore+0x1b976)
#14 0x7fff81c1f066 in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0xaa066)
#15 0x7fff81c1efd6 in __CFRunLoopDoObservers (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0xa9fd6)
#16 0x7fff81bfdef7 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x88ef7)
#17 0x7fff82fde934 in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x30934)
#18 0x7fff82fde76e in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x3076e)
#19 0x7fff82fde5ae in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x305ae)
#20 0x7fff8e643df5 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x48df5)
#21 0x7fff8e643225 in -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x48225)
#22 0x7fff8e637d7f in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x3cd7f)
#23 0x7fff8e601367 in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x6367)
#24 0x7fff92f09193 in _xpc_objc_main (/usr/lib/system/libxpc.dylib+0x11193)
#25 0x7fff92f07bbd in xpc_main (/usr/lib/system/libxpc.dylib+0xfbbd)
#26 0x104ecbf73 in main (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development+0x100001f73)
#27 0x7fff8ab8d5ac in start (/usr/lib/system/libdyld.dylib+0x35ac)
#28 0x0 (<unknown module>)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2d01528) in WTFCrash
==2377==ABORTING
#CRASHED - com.apple.WebKit.WebContent.Development (pid 2377)</pre>
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