[Webkit-unassigned] [Bug 226118] New: ASSERTION FAILED: Component at index 1 is 1.000000 and is greater than the allowed maximum 1.000000

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=226118

            Bug ID: 226118
           Summary: ASSERTION FAILED: Component at index 1 is 1.000000 and
                    is greater than the allowed maximum 1.000000
           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: Jenner at apple.com

TestWebKitAPI.SampledPageTopColor.MainDocumentChange

is having an Assertion Failure/ crash on Debug for Catalina and up, as well as iOS14-Simulator Debug.

HISTORY:
https://results.webkit.org/?suite=api-tests&test=TestWebKitAPI.SampledPageTopColor.MainDocumentChange

It appears that it was recently introduced at r277523, and has crashed on Debug ever since:
https://trac.webkit.org/changeset/277523/webkit

TestWebKitAPI.SampledPageTopColor.MainDocumentChange
        ASSERTION FAILED: Component at index 1 is 1.000000 and is greater than the allowed maximum 1.000000
        components[i] <= T::Model::componentInfo[i].max
        /Volumes/Data/worker/catalina-debug/build/Source/WebCore/platform/graphics/ColorTypes.h(133) : void WebCore::assertInRange(T) [T = WebCore::RGBAType<float, WebCore::SRGBADescriptor<float>, WebCore::BoundedGammaEncoded<float, WebCore::SRGBADescriptor<float> >, WebCore::RGBModel<float>, WebCore::SRGBTransferFunction<float, WebCore::TransferFunctionMode::Clamped> >]
        1   0x10d7102f9 WTFCrash
        2   0x12a8366dd void WebCore::assertInRange<WebCore::RGBAType<float, WebCore::SRGBADescriptor<float>, WebCore::BoundedGammaEncoded<float, WebCore::SRGBADescriptor<float> >, WebCore::RGBModel<float>, WebCore::SRGBTransferFunction<float, (WebCore::TransferFunctionMode)0> > >(WebCore::RGBAType<float, WebCore::SRGBADescriptor<float>, WebCore::BoundedGammaEncoded<float, WebCore::SRGBADescriptor<float> >, WebCore::RGBModel<float>, WebCore::SRGBTransferFunction<float, (WebCore::TransferFunctionMode)0> >)
        3   0x12a836549 WebCore::RGBAType<float, WebCore::SRGBADescriptor<float>, WebCore::BoundedGammaEncoded<float, WebCore::SRGBADescriptor<float> >, WebCore::RGBModel<float>, WebCore::SRGBTransferFunction<float, (WebCore::TransferFunctionMode)0> >::RGBAType(float, float, float, float)
        4   0x12a8364d0 WebCore::BoundedGammaEncoded<float, WebCore::SRGBADescriptor<float> >::BoundedGammaEncoded(float, float, float, float)
        5   0x12a8363bd WebCore::BoundedGammaEncoded<float, WebCore::SRGBADescriptor<float> >::BoundedGammaEncoded(float, float, float, float)
        6   0x12ec485e6 WebCore::roundAndClampToSRGBALossy(CGColor*)
        7   0x12ec4863b WebCore::Color::Color(CGColor*, WTF::OptionSet<WebCore::Color::Flags>)
        8   0x10a8121ba SampledPageTopColor_MainDocumentChange_Test::TestBody()
        9   0x10ad00024 void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)
        10  0x10acc23eb void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)
        11  0x10acc2323 testing::Test::Run()
        12  0x10acc34f4 testing::TestInfo::Run()
        13  0x10acc46d5 testing::TestSuite::Run()
        14  0x10acd388d testing::internal::UnitTestImpl::RunAllTests()
        15  0x10ad05204 bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*)
        16  0x10acd322b bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*)
        17  0x10acd30fd testing::UnitTest::Run()
        18  0x10aa08a11 RUN_ALL_TESTS()
        19  0x10aa089a2 TestWebKitAPI::TestsController::run(int, char**)
        20  0x10ac8981f main
        21  0x7fff6afeacc9 start
        22  0x2

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