[Webkit-unassigned] [Bug 241879] New: REGRESSION (251257 at main): [ macOS wk1 ] fast/replaced/encrypted-pdf-as-object-and-embed.html is a flaky crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=241879

            Bug ID: 241879
           Summary: REGRESSION (251257 at main): [ macOS wk1 ]
                    fast/replaced/encrypted-pdf-as-object-and-embed.html
                    is a flaky crash
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rackler at apple.com

Description:
fast/replaced/encrypted-pdf-as-object-and-embed.html

The first failure that I saw on the dashboard was on 6/3/2022 at 251265 at main.

REPRODUCTION STEPS
I can reproduce this on 251257 at main, but unable to reproduce it on 251256 at main or earlier.

Command: 
run-webkit-tests -1 --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --iterations 50 -f --no-retry fast/replaced/encrypted-pdf-as-object-and-embed.html

Result: 
Unexpected flakiness: crashes (1)
  fast/replaced/encrypted-pdf-as-object-and-embed.html [ Crash Pass ]

History:
https://results.webkit.org/?suite=layout-tests&test=fast%2Freplaced%2Fencrypted-pdf-as-object-and-embed.html&platform=mac&flavor=wk1&limit=50000

Crash Log:
Thread 0 Crashed::   Dispatch queue: com.apple.main-thread
0   com.apple.WebCore                          0x11737e1a6    WebCore::Style::Scope::updateQueryContainerState(WebCore::Style::Scope::QueryContainerUpdateContext&)
1   com.apple.WebCore                          0x116d83acc    WebCore::FrameViewLayoutContext::layout()
2   com.apple.WebCore                          0x11728abf6    WebCore::RenderWidget::updateWidgetPosition()
3   com.apple.WebCore                          0x116d77fbe    WebCore::FrameView::updateWidgetPositions()
4   com.apple.WebCore                          0x116d79cfe    WebCore::FrameView::performPostLayoutTasks()
5   com.apple.WebCore                          0x116d84442    WebCore::FrameViewLayoutContext::runOrScheduleAsynchronousTasks()

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