<!DOCTYPE html> <html> <head> <style type="text/css" media="screen"> .box { width: 100px; height: 100px; background-color: blue; -webkit-transform: translateZ(0); } </style> </head> <body> <div class="box"></div> <p><a href="https://bugs.webkit.org/show_bug.cgi?id=43167">https://bugs.webkit.org/show_bug.cgi?id=43167</a><br> You should not hit an assertion if you load this file in a tab, then switch back and forth between other tabs.</p> </body> </html>