Bug 308849 – REGRESSION(307744@main): [iOS debug] css3/filters/effect-drop-shadow.html is a constant crash

• Component: Layout and Rendering
• Status: RESOLVED FIXED

[Diego De La Toba]

css3/filters/effect-drop-shadow.html is a constant crash on iOS debug. 


HISTORY:
https://results.webkit.org/?suite=layout-tests&test=css3%2Ffilters%2Feffect-drop-shadow.html


CRASH LOG:
No crash log found for WebKitTestRunnerApp:30805.

stdout:
layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x245
  RenderBlock {HTML} at (0,0) size 800x245
    RenderBody {BODY} at (8,8) size 784x229
      RenderText {#text} at (0,0) size 0x0
layer at (18,18) size 160x90
  RenderImage {IMG} at (10,10) size 160x90
layer at (198,18) size 160x90
  RenderImage {IMG} at (190,10) size 160x90
layer at (378,18) size 160x90
  RenderImage {IMG} at (370,10) size 160x90
layer at (558,18) size 160x90
  RenderImage {IMG} at (550,10) size 160x90
layer at (18,133) size 160x90
  RenderImage {IMG} at (10,124) size 160x91

stderr:
SHOULD NEVER BE REACHED
/Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-Build/build/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm(3784) : void WebKit::WebPage::updateVisibleContentRects(const VisibleContentRectUpdateInfo &, MonotonicTime)
1   0x132fe4fe4 WebKit::WebPage::updateVisibleContentRects(WebKit::VisibleContentRectUpdateInfo const&, WTF::MonotonicTime)
2   0x13437edcc WebKit::ViewUpdateDispatcher::dispatchVisibleContentRectUpdate()
3   0x134394568 WebKit::ViewUpdateDispatcher::visibleContentRectUpdate(WTF::ObjectIdentifierGeneric<WebCore::PageIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebKit::VisibleContentRectUpdateInfo const&)::$_0::operator()() const
4   0x134394330 WTF::Detail::CallableWrapper<WebKit::ViewUpdateDispatcher::visibleContentRectUpdate(WTF::ObjectIdentifierGeneric<WebCore::PageIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebKit::VisibleContentRectUpdateInfo const&)::$_0, void>::call()
5   0x1057a385c WTF::Function<void ()>::operator()() const
6   0x1058817b0 WTF::RunLoop::performWork()
7   0x105889394 WTF::RunLoop::performWork(void*)
8   0x1804563a4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
9   0x1804562ec __CFRunLoopDoSource0
10  0x180455a78 __CFRunLoopDoSources0
11  0x180454c4c __CFRunLoopRun
12  0x18044fcec _CFRunLoopRunSpecificWithOptions
13  0x18110be48 -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
14  0x18110c018 -[NSRunLoop(NSRunLoop) run]
15  0x18011282c _xpc_objc_main
16  0x180114c38 _xpc_main
17  0x180114dec _xpc_create_bootstrap_pipe
18  0x1d4bdcaf4 $s19ExtensionFoundation023_EXRunningLibXPCServiceA0C6resumeyyF
19  0x1d4b701e0 $s19ExtensionFoundation010_EXRunningA0C5start13withArguments5counts5Int32VSpySPys4Int8VGGSg_AHtF
20  0x1d4b683d4 $s19ExtensionFoundation15EXExtensionMainyS2i_SpySPys4Int8VGGSgtF
21  0x181151070 NSExtensionMain
22  0x1026ed3d0 21  dyld                                0x00000001026ed3d0 start_sim + 20
23  0x10285cd54 22  ???                                 0x000000010285cd54 0x0 + 4337290580
com.apple.WebKit.WebContent.Development terminated (pid 30810) for reason: crash
#CRASHED - com.apple.WebKit.WebContent.Development (pid 30810)


REPRODUCTION:
I was able to reproduce on iOS 26.2 debug ToT with the following:

run-webkit-tests --ios-simulator --debug --child-processes=1 --no-retry css3/filters/effect-drop-shadow.html

[Radar WebKit Bug Importer]

<rdar://problem/171385160>

[Diego De La Toba]

Pull request: https://github.com/WebKit/WebKit/pull/59610

[EWS]

Test gardening commit 308367@main (8630c822fcda): <https://commits.webkit.org/308367@main>

Reviewed commits have been landed. Closing PR #59610 and removing active labels.

[Jonathan Bedard]

Impacts more than just one test, I expect. compositing/geometry/fixed-position-composited-page-scale-smaller-than-viewport.html, for example, seems to have a similar assertion:
https://results.webkit.org/?suite=layout-tests&test=compositing%2Fgeometry%2Ffixed-position-composited-page-scale-smaller-than-viewport.html

[Simon Fraser (smfr)]

Pull request: https://github.com/WebKit/WebKit/pull/59723

[EWS]

Committed 308491@main (a395421472e8): <https://commits.webkit.org/308491@main>

Reviewed commits have been landed. Closing PR #59723 and removing active labels.