Bug 308583

Summary:	pdf/pdf-plugin-printing.html is flakily crashing, ASSERTION FAILED: m_plugInStreamLoaders.contains(&loader)
Product:	WebKit	Reporter:	Abrar Rahman Protyasha <a_protyasha>
Component:	PDF	Assignee:	Abrar Rahman Protyasha <a_protyasha>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	a_protyasha, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Abrar Rahman Protyasha

Reported 2026-02-24 14:25:43 PST

The test fails with this stderr output: ``` ASSERTION FAILED: m_plugInStreamLoaders.contains(&loader) /Source/WebCore/loader/DocumentLoader.cpp(2063) : void WebCore::DocumentLoader::removePlugInStreamLoader(ResourceLoader &) 1 0x3066714fc WebCore::DocumentLoader::removePlugInStreamLoader(WebCore::ResourceLoader&) 2 0x306792e2c WebCore::NetscapePlugInStreamLoader::notifyDone() 3 0x306792f7c WebCore::NetscapePlugInStreamLoader::didCancel(WebCore::LoadWillContinueInAnotherProcess) 4 0x3067c0a88 WebCore::ResourceLoader::cancel(WebCore::ResourceError const&, WebCore::LoadWillContinueInAnotherProcess) 5 0x11f827ae8 WebKit::PluginView::Stream::cancel() 6 0x11f8289e4 WebKit::PluginView::~PluginView() 7 0x11f828bb4 WebKit::PluginView::~PluginView() 8 0x11f828be0 WebKit::PluginView::~PluginView() 9 0x3025fb0d8 WTF::RefCounted<WebCore::Widget>::deref() const 10 0x302602824 WTF::DefaultRefDerefTraits<WebCore::Widget>::derefIfNotNull(WebCore::Widget*) 11 0x306ab0ef8 WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>::~Ref() 12 0x306a5ed3c WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>::~Ref() 13 0x307c137c4 WTF::KeyValuePair<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>::~KeyValuePair() 14 0x307c13778 WTF::KeyValuePair<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>::~KeyValuePair() 15 0x307c13704 WTF::HashTable<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::KeyValuePair<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>>, WTF::DefaultHash<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashMap<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>, WTF::DefaultHash<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>, WTF::HashTableTraits, (WTF::ShouldValidateKey)1, WTF::FastMalloc>::KeyValuePairTraits, WTF::HashTraits<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::FastMalloc>::deallocateTable(WTF::KeyValuePair<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>*) 16 0x307c13670 WTF::HashTable<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::KeyValuePair<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>>, WTF::DefaultHash<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashMap<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>, WTF::DefaultHash<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>, WTF::HashTableTraits, (WTF::ShouldValidateKey)1, WTF::FastMalloc>::KeyValuePairTraits, WTF::HashTraits<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::FastMalloc>::~HashTable() 17 0x307c135e4 WTF::HashTable<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::KeyValuePair<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>>, WTF::DefaultHash<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashMap<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>, WTF::DefaultHash<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>, WTF::HashTableTraits, (WTF::ShouldValidateKey)1, WTF::FastMalloc>::KeyValuePairTraits, WTF::HashTraits<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::FastMalloc>::~HashTable() 18 0x307c13880 WTF::HashMap<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>, WTF::DefaultHash<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>, WTF::HashTableTraits, (WTF::ShouldValidateKey)1, WTF::FastMalloc>::~HashMap() 19 0x307c0a728 WTF::HashMap<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>, WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>, WTF::DefaultHash<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::Ref<WebCore::Widget, WTF::RawPtrTraits<WebCore::Widget>, WTF::DefaultRefDerefTraits<WebCore::Widget>>>, WTF::HashTraits<WTF::WeakPtr<WebCore::LocalFrameView, WTF::SingleThreadWeakPtrImpl, WTF::RawPtrTraits<WTF::SingleThreadWeakPtrImpl>>>, WTF::HashTableTraits, (WTF::ShouldValidateKey)1, WTF::FastMalloc>::~HashMap() 20 0x307c0a618 WebCore::WidgetHierarchyUpdatesSuspensionScope::moveWidgets() 21 0x3025f6b40 WebCore::WidgetHierarchyUpdatesSuspensionScope::~WidgetHierarchyUpdatesSuspensionScope() 22 0x3025e4178 WebCore::WidgetHierarchyUpdatesSuspensionScope::~WidgetHierarchyUpdatesSuspensionScope() 23 0x3056930d8 WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType) 24 0x305693b54 WebCore::Document::updateStyleIfNeeded() 25 0x306a68948 WebCore::LocalFrameViewLayoutContext::updateStyleForLayout() 26 0x306a67d98 WebCore::LocalFrameViewLayoutContext::performLayout(bool) 27 0x306a3b814 WebCore::LocalFrameViewLayoutContext::layout(bool) 28 0x306a38064 WebCore::LocalFrameView::forceLayout(bool) 29 0x306a37b80 WebCore::LocalFrameView::forceLayoutForPagination(WebCore::FloatSize const&, WebCore::FloatSize const&, float, WebCore::AdjustViewSize) 30 0x306a377a4 WebCore::LocalFrame::setPrinting(bool, WebCore::FloatSize, WebCore::FloatSize, float, WebCore::AdjustViewSize, WebCore::Frame::NotifyUIProcess) 31 0x306bfbbac WebCore::PrintContext::begin(float, float) com.apple.WebKit.WebContent.Development terminated (pid 28543) for reason: crash ```

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Radar WebKit Bug Importer

Comment 1 2026-02-24 14:25:49 PST

<rdar://problem/171111801>

Abrar Rahman Protyasha

Comment 2 2026-02-24 16:52:42 PST

Pull request: https://github.com/WebKit/WebKit/pull/59377

EWS

Comment 3 2026-02-25 16:24:57 PST

Committed 308242@main (8f4821e1ffd5): <https://commits.webkit.org/308242@main> Reviewed commits have been landed. Closing PR #59377 and removing active labels.

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