[Webkit-unassigned] [Bug 93876] New: Transition of right or left padding (or border-width) does not correctly transition the width of block auto-width children

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=93876

           Summary: Transition of right or left padding (or border-width)
                    does not correctly transition the width of block
                    auto-width children
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.7
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dtrebbien at gmail.com
                CC: dtrebbien at gmail.com


Created an attachment (id=158063)
 --> (https://bugs.webkit.org/attachment.cgi?id=158063&action=review)
Reduced test case

When the right or left padding or border-width of a parent element is transitioned, the width of an auto-width block child is not correctly transitioned. In the case of transitions of left padding or border-width, the width of the parent is expanded. In the case of transitions of right padding or border-width, the child's width remains unchanged. Only by resizing the width of the browser or interacting with the element in Web Inspector does WebKit suddenly correct the width of the child.

Attached is a reduced test case. The test case works as expected in Firefox 14.0.1 and Opera 12.01 build 1532, but fails in Safari 5.0.5, Safari 6.0, Chrome 21.0.1180.75, Chrome 23.0.1232.0 canary, and WebKit nightly r125269 built on 10 August 2012.

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