[Webkit-unassigned] [Bug 85380] New: Switching focus to an element with CSS display: none iOS crashes Mobile Safari

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=85380

           Summary: Switching focus to an element with CSS display: none
                    iOS crashes Mobile Safari
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: chuck at jumis.com


By using CSS selectors we can set adjacent or child elements to display when an item is hovered over or focused.
Such as
<button>Content <span onclick="1;">popup</span></button>

span {
display: none; position: absolute; top: -3em;
}

button:focus, button:hover span {
display: block;
}

The technique seems to crash Mobile Safari when tapping on the child element. On the desktop, it works fine and the element stays displayed. It seems on Mobile Safari that the button loses focus, causing the child to become display: none before receiving focus, then immediately crashes the browser.

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