[Webkit-unassigned] [Bug 226006] New: regression: Safari v14.1 computes element height to be 33, 554, 432 pixels

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=226006

            Bug ID: 226006
           Summary: regression: Safari v14.1 computes element height to be
                    33,554,432 pixels
           Product: WebKit
           Version: Safari 14
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: theblueslate at gmail.com

Created attachment 429138

  --> https://bugs.webkit.org/attachment.cgi?id=429138&action=review

screenshot of how jsfiddle looks in safari v14.1 vs how it should actually look

Safari v14.1 (build 16611.1.21.161.6) broke the display of one of our pages. I've replicated the problem here: https://jsfiddle.net/ao1xcs2q/ I have also attached a screenshot which shows how the jsfiddle renders on safari v14.1 (and iOS v14.5.1) and how it used to render on previous versions.

The element that breaks rendering is: <small class="noteshow">This could be a YouTube or Vimeo video, or something else</small>. The css rule that causes the problem is the margin-top: -10px. Safari v14.1 renders the element as 33,554,432 pixels high, completely obscuring any following content on the page. Disabling this rule makes makes the element render as expected.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20210520/82df723a/attachment.htm>