Bug 39295 – Crash (preceded by assertion) in WKCACFLayerRenderer::setNeedsDisplay when computer wakes from sleep on particular page

• Status: RESOLVED
• Resolution: FIXED
• Component: Layout and Rendering

[Adam Roben (:aroben)]

Created attachment 56382 [details]
testcase (just an auto-reloading version of poster-circle.html)

To reproduce:

1. Load the attached testcase
2. Put your computer to sleep
3. Wake your computer up

You'll crash inside WKCACFLayerRenderer::setNeedsDisplay due to m_rootLayer being null. Here's a partial backtrace:

WKCACFLayerRenderer::setNeedsDisplay(void)+0xf
WebView::repaint(class WebCore::IntRect * windowRect = 0x7fb4ad20, bool contentChanged = true, bool immediate = false, bool repaintContentOnly = false)+0x29
WebChromeClient::invalidateContentsAndWindow(class WebCore::IntRect * windowRect = 0x68407b51, bool immediate = false)+0x16
WebCore::ScrollView::repaintContentRectangle(class WebCore::IntRect * rect = 0x7c2ff300, bool now = false)+0x9b
WebCore::FrameView::doDeferredRepaints(void)+0x81
WebCore::FrameView::endDeferredRepaints(void)+0x78
WebCore::FrameView::layout(bool allowSubtree = true)+0x5a2
WebCore::Timer<WebCore::MediaPlayerPrivate>::fired(void)+0xe
WebCore::ThreadTimers::sharedTimerFiredInternal(void)+0xef
WebCore::ThreadTimers::sharedTimerFired(void)+0xe

[Adam Roben (:aroben)]

<rdar://problem/7971319>

[Adam Roben (:aroben)]

Created attachment 56384 [details]
Fix a crash when a page that uses accelerated compositing loads soon after the computer wakes from sleep

[Adam Roben (:aroben)]

Committed r59682: <http://trac.webkit.org/changeset/59682>