[Webkit-unassigned] [Bug 250484] New: REGRESSION(258307 at main) ASSERTION FAILED: scale == [webView->_scrollView zoomScale]

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=250484

            Bug ID: 250484
           Summary: REGRESSION(258307 at main) ASSERTION FAILED: scale ==
                    [webView->_scrollView zoomScale]
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Jenner at apple.com

The following 7 API-tests are crashing/hitting an assertion on iOS Debug:

TestWebKitAPI.AnimatedResize.ChangeFrameAndMinimumEffectiveDeviceWidthDuringAnimatedResize
TestWebKitAPI.AnimatedResize.OverrideLayoutSizeChangesDuringAnimatedResizeSucceed
TestWebKitAPI.AnimatedResize.ResizeWithContentHiddenCompletes
TestWebKitAPI.AnimatedResize.ResizeWithContentHiddenWithSubsequentNoOpResizeCompletes
TestWebKitAPI.AnimatedResize.AnimatedResizeBlocksDoAfterNextPresentationUpdate
TestWebKitAPI.AnimatedResize.AnimatedResizeBlocksViewportFitChanges
TestWebKitAPI.RestoreScrollPositionTests.RestoreScrollPositionDuringResize


HISTORY:
https://results.webkit.org/?suite=api-tests&suite=api-tests&suite=api-tests&suite=api-tests&suite=api-tests&suite=api-tests&suite=api-tests&test=TestWebKitAPI.AnimatedResize.ChangeFrameAndMinimumEffectiveDeviceWidthDuringAnimatedResize&test=TestWebKitAPI.AnimatedResize.OverrideLayoutSizeChangesDuringAnimatedResizeSucceed&test=TestWebKitAPI.AnimatedResize.ResizeWithContentHiddenCompletes&test=TestWebKitAPI.AnimatedResize.ResizeWithContentHiddenWithSubsequentNoOpResizeCompletes&test=TestWebKitAPI.AnimatedResize.AnimatedResizeBlocksDoAfterNextPresentationUpdate&test=TestWebKitAPI.AnimatedResize.AnimatedResizeBlocksViewportFitChanges&test=TestWebKitAPI.RestoreScrollPositionTests.RestoreScrollPositionDuringResize


Assertion/Crash TEXT:
        ASSERTION FAILED: scale == [webView->_scrollView zoomScale]
        /Volumes/Data/worker/Apple-iOS-16-Simulator-Debug-Build/build/Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm(567) : CGFloat contentZoomScale(WKWebView *)
        1   0x1152380d9 WTFCrash
        2   0x1349681cb WTFCrashWithInfo(int, char const*, char const*, int)
        3   0x135e31601 contentZoomScale(WKWebView*)
        4   0x135e47821 -[WKWebView(WKPrivateIOS) _beginAnimatedResizeWithUpdates:]
        5   0x103f334ac AnimatedResize_ChangeFrameAndMinimumEffectiveDeviceWidthDuringAnimatedResize_Test::TestBody()
        6   0x10493668b void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)
        7   0x10490d19a void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)
        8   0x10490d0e3 testing::Test::Run()
        9   0x10490e121 testing::TestInfo::Run()
        10  0x10490f1a4 testing::TestSuite::Run()
        11  0x10491d89c testing::internal::UnitTestImpl::RunAllTests()
        12  0x10493aa3b bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*)
        13  0x10491d27a bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::Uni
tTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*)
        14  0x10491d165 testing::UnitTest::Run()
        15  0x103f296d1 RUN_ALL_TESTS()
        16  0x103f29666 TestWebKitAPI::TestsController::run(int, char**)
        17  0x1048e12dc main
        18  0x1076902bf (null)
        19  0x11518352e (null)
        Child process terminated with signal 11: Segmentation fault

https://build.webkit.org/#/builders/663/builds/568/steps/18/logs/stdio



I was able to reproduce all of these assertions/crashes by running the test as follows:

run-api-tests <insert_test_name_here> 


I was able to reproduce the crash as far back as 258307 at main, but all tests passed when ran at 258306 at main. So it appears that 258307 at main is our culprit.

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