Bug 104473

After http://trac.webkit.org/changeset/136948, inspector/styles/import-pseudoclass-crash.html hits the following assertion: crash log for WebKitTestRunner (pid 20597): STDOUT: <empty> STDERR: ASSERTION FAILED: m_childRuleCSSOMWrappers.size() == ruleCount STDERR: /home/buildslave-1/webkit-buildslave/efl-linux-64-debug-wk2/build/Source/WebCore/css/CSSStyleSheet.cpp(228) : WebCore::CSSRule* WebCore::CSSStyleSheet::item(unsigned int) STDERR: 1 0x7fed0f4f9136 WebCore::CSSStyleSheet::item(unsigned int) STDERR: 2 0x7fed0f59cde8 STDERR: 3 0x7fed0f593d53 STDERR: 4 0x7fed0f593da5 STDERR: 5 0x7fed0f593f6f WebCore::StyleResolver::ensureFullCSSOMWrapperForInspector(WebCore::StyleRule*) STDERR: 6 0x7fed0f9f1b5e WebCore::InspectorInstrumentation::willMatchRuleImpl(WebCore::InstrumentingAgents*, WebCore::StyleRule*, WebCore::StyleResolver*) STDERR: 7 0x7fed0f5a0016 WebCore::InspectorInstrumentation::willMatchRule(WebCore::Document*, WebCore::StyleRule*, WebCore::StyleResolver*) STDERR: 8 0x7fed0f58d399 WebCore::StyleResolver::collectMatchingRulesForList(WTF::Vector<WebCore::RuleData, 0ul> const*, int&, int&, WebCore::StyleResolver::MatchOptions const&) STDERR: 9 0x7fed0f58c7e7 WebCore::StyleResolver::collectMatchingRules(WebCore::RuleSet*, int&, int&, WebCore::StyleResolver::MatchOptions const&) STDERR: 10 0x7fed0f58d294 WebCore::StyleResolver::matchUARules(WebCore::StyleResolver::MatchResult&, WebCore::RuleSet*) STDERR: 11 0x7fed0f58ed57 WebCore::StyleResolver::matchUARules(WebCore::StyleResolver::MatchResult&) STDERR: 12 0x7fed0f58ff3e WebCore::StyleResolver::styleForElement(WebCore::Element*, WebCore::RenderStyle*, WebCore::StyleSharingBehavior, WebCore::RuleMatchingBehavior, WebCore::RenderRegion*) STDERR: 13 0x7fed0f58a60d WebCore::StyleResolver::StyleResolver(WebCore::Document*, bool) STDERR: 14 0x7fed0f61d3c3 WebCore::Document::createStyleResolver() STDERR: 15 0x7fed0f519914 WebCore::Document::styleResolver() STDERR: 16 0x7fed0f67fcb9 WebCore::Element::styleForRenderer() STDERR: 17 0x7fed0f67fe7c WebCore::Element::recalcStyle(WebCore::Node::StyleChange) STDERR: 18 0x7fed0f61c41e WebCore::Document::recalcStyle(WebCore::Node::StyleChange) STDERR: 19 0x7fed0f621045 WebCore::Document::styleResolverChanged(WebCore::StyleResolverUpdateFlag) STDERR: 20 0x7fed0f61fa75 WebCore::Document::didRemoveAllPendingStylesheet() STDERR: 21 0x7fed0f673579 WebCore::DocumentStyleSheetCollection::removePendingSheet(WebCore::DocumentStyleSheetCollection::RemovePendingSheetNotificationType) STDERR: 22 0x7fed0f8623c2 WebCore::HTMLLinkElement::removePendingSheet(WebCore::HTMLLinkElement::RemovePendingSheetNotificationType) STDERR: 23 0x7fed0f861eb0 WebCore::HTMLLinkElement::sheetLoaded() STDERR: 24 0x7fed0f5d03ef WebCore::StyleSheetContents::checkLoaded() STDERR: 25 0x7fed0f5c8dfb WebCore::StyleRuleImport::setCSSStyleSheet(WTF::String const&, WebCore::KURL const&, WTF::String const&, WebCore::CachedCSSStyleSheet const*) STDERR: 26 0x7fed0f5c9539 WebCore::StyleRuleImport::ImportedStyleSheetClient::setCSSStyleSheet(WTF::String const&, WebCore::KURL const&, WTF::String const&, WebCore::CachedCSSStyleSheet const*) STDERR: 27 0x7fed0fae6a83 WebCore::CachedCSSStyleSheet::didAddClient(WebCore::CachedResourceClient*) STDERR: 28 0x7fed0faf0713 WebCore::CachedResource::addClient(WebCore::CachedResourceClient*) STDERR: 29 0x7fed0f5c927a WebCore::StyleRuleImport::requestStyleSheet() STDERR: 30 0x7fed0f5cf5e6 WebCore::StyleSheetContents::parserAppendRule(WTF::PassRefPtr<WebCore::StyleRuleBase>) STDERR: 31 0x7fed10719513 cssyyparse(WebCore::CSSParser*) STDERR: ASSERTION FAILED: m_connection STDERR: /home/buildslave-1/webkit-buildslave/efl-linux-64-debug-wk2/build/Source/WebKit2/Shared/ChildProcessProxy.h(52) : CoreIPC::Connection* WebKit::ChildProcessProxy::connection() const STDERR: 1 0x7f03bf4499b8 WebKit::ChildProcessProxy::connection() const STDERR: 2 0x7f03bf449595 WebKit::ChildProcessProxy::sendMessage(CoreIPC::MessageID, WTF::PassOwnPtr<CoreIPC::MessageEncoder>, unsigned int) STDERR: 3 0x7f03bf4a99e5 bool WebKit::ChildProcessProxy::send<Messages::DrawingArea::SuspendPainting>(Messages::DrawingArea::SuspendPainting const&, unsigned long, unsigned int) STDERR: 4 0x7f03bf4a7b12 WebKit::DrawingAreaProxyImpl::visibilityDidChange() STDERR: 5 0x7f03bf4fdeec WebKit::WebPageProxy::viewStateDidChange(unsigned int) STDERR: 6 0x7f03bf6c70bc STDERR: 7 0x7f03be084132 evas_object_event_callback_call STDERR: 8 0x7f03be0a2bde evas_object_inform_call_hide STDERR: 9 0x7f03be0a0765 evas_object_del STDERR: 10 0x7f03bf6e3745 WebKit::WebInspectorProxy::platformDidClose() STDERR: 11 0x7f03bf4eaa22 WebKit::WebInspectorProxy::didClose() STDERR: 12 0x7f03bf4e9e54 WebKit::WebInspectorProxy::invalidate() STDERR: 13 0x7f03bf50979d WebKit::WebPageProxy::processDidCrash() STDERR: 14 0x7f03bf542b7c WebKit::WebProcessProxy::didClose(CoreIPC::Connection*) STDERR: 15 0x7f03bf42805d CoreIPC::Connection::dispatchConnectionDidClose() STDERR: 16 0x7f03bf433106 WTF::FunctionWrapper<void (CoreIPC::Connection::*)()>::operator()(CoreIPC::Connection*) STDERR: 17 0x7f03bf432f0c WTF::BoundFunctionImpl<WTF::FunctionWrapper<void (CoreIPC::Connection::*)()>, void (CoreIPC::Connection*)>::operator()() STDERR: 18 0x7f03c66c1c1e WTF::Function<void ()>::operator()() const STDERR: 19 0x7f03c2af7b63 WebCore::RunLoop::performWork() STDERR: 20 0x7f03c3526403 WebCore::RunLoop::wakeUpEvent(void*, void*, unsigned int) STDERR: 21 0x7f03be820621 STDERR: 22 0x7f03be81f571 STDERR: 23 0x7f03be81fab7 ecore_main_loop_begin STDERR: 24 0x433ba9 WTR::TestController::platformRunUntil(bool&, double) STDERR: 25 0x41ecd2 WTR::TestController::runUntil(bool&, WTR::TestController::TimeoutDuration) STDERR: 26 0x425d8a WTR::TestInvocation::invoke() STDERR: 27 0x41ea0a WTR::TestController::runTest(char const*) STDERR: 28 0x41eb43 WTR::TestController::runTestingServerLoop() STDERR: 29 0x41ebdd WTR::TestController::run() STDERR: 30 0x41c513 WTR::TestController::TestController(int, char const**) STDERR: 31 0x433d42 main cf. http://build.webkit.org/results/EFL%20Linux%2064-bit%20Debug%20WK2/r136948%20%286776%29/inspector/styles/import-pseudoclass-crash-crash-log.txt