[Webkit-unassigned] [Bug 137915] New: Overflowing scroll problems when CSS perspective is active in HTML tag

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=137915

            Bug ID: 137915
           Summary: Overflowing scroll problems when CSS perspective is
                    active in HTML tag
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Macintosh Intel
                OS: Mac OS X 10.9
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: swat_marc at yahoo.es

Created attachment 240195
  --> https://bugs.webkit.org/attachment.cgi?id=240195&action=review
Bug sample

WebKit 7.1 (9537.85.10.17.1, r174761)

     Safari 7.1: FAIL
  Firefox 36a: OK
     Opera 25: FAIL

What steps will reproduce the problem?
1. In the CSS, set html tag has a property -webkit-perspective:1.
2. In the CSS, you create a navigation drawer by making nav element to be position:fixed, top:0, bottom:0, overflow:auto.
3. In the HTML, create enough navigation and content items to make them overflow.

What is the expected result?
It should be possible to scroll up to the latest item in both content and navigation drawer.

What happens instead of that?
It's impossible to reach the latest item in the navigation drawer. Instead, the navigation drawer bottom property is dismissed (?) and its height is set to the total height of the HTML element.

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