201286 - Magic pseudo-classes should not be accessible from author sheets

Status: RESOLVED DUPLICATE of bug 331883

(Core :: CSS Parsing and Computation, defect)

Description

[Boris Zbarsky [:bzbarsky]]

Load the following HTML in Mozilla.  Then leave the page. Watch us crash.

<style>
*|*:-moz-scrolled-content { position: fixed }
</style>
<div style="overflow:scroll"></div>

The actual crash is in the viewmanager:

#0  0x4212c65d in ?? ()
#1  0x4121214a in nsViewManager::UpdateWidgetArea (this=0x876a508, 
    aWidgetView=0x4212b0c0, aDamagedRect=@0xbfffea1c, aIgnoreWidgetView=0x0)
    at /home/bzbarsky/mozilla/xlib/mozilla/view/src/nsViewManager.cpp:1675
#2  0x412121a8 in nsViewManager::UpdateWidgetArea (this=0x876a508, 
    aWidgetView=0x86b3888, aDamagedRect=@0xbfffea9c, aIgnoreWidgetView=0x0)
    at /home/bzbarsky/mozilla/xlib/mozilla/view/src/nsViewManager.cpp:1685

But maybe we should just make sure that these magic pseudos can't be set by
author style?