Bug 306253 – [threaded-animations] repeated crash on https://nerdy.dev/anchor-interpolated-morphing

• Status: RESOLVED
• Resolution: FIXED
• Component: Animations

[Antoine Quint]

Loading https://nerdy.dev/anchor-interpolated-morphing with a ToT build crashes every time. We’re hitting this case in `auto ToPlatform<FilterValue>::operator()(const FilterValue& value, const RenderStyle& style)`:

    [](const FilterReference&) -> Ref<FilterOperation> {
        RELEASE_ASSERT_NOT_REACHED();
    }

While we explicitly disallow acceleration for filter animations with reference filters, this code is hit when we’re preparing the base values. We just need to make sure we don’t compute such values when the property is not animated, since in this case we must be animating opacity or a transform-related property.

[Antoine Quint]

rdar://168778245

[Antoine Quint]

Pull request: https://github.com/WebKit/WebKit/pull/57243

[EWS]

Committed 306204@main (0fdb9b7d2bff): <https://commits.webkit.org/306204@main>

Reviewed commits have been landed. Closing PR #57243 and removing active labels.