[Webkit-unassigned] [Bug 254641] New: [Safari 16.4] Important regression on grid rendering

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=254641

            Bug ID: 254641
           Summary: [Safari 16.4] Important regression on grid rendering
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: iOS 16
            Status: NEW
          Severity: Major
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mic.gallego at gmail.com

Hi,

Since Safari 16.4 (both on mobile and desktop) an important regression has been caused to CSS grid which broke thousands of our themes using it.

I have been able to set up a minimal reproduction step here: https://codepen.io/bakura10/pen/PodgbzN

The rendering is correct on Chrome, Firefox and Safari 16.3 and lower.

I have been able to solve it by changing 1fr to minmax(0, 1fr) on the content-over-media component, but obviously this regression is causing issues to the thousands of existing installs of the theme :(.

Thanks

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