User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20100101 Firefox/6.0 Build ID: 20110811165603 Steps to reproduce: I experimented with an XHTML page that contains a lot of nested <div> elements, like ...<div><div><div></div></div></div>... (about 2000). Actual results: Firefox 2.0.20, 3.6.20, 4.0.1, 5.0.1, 6.0 crash when I open the page. I made an example XHTML page that reproduces the problem and attached it (please note that Firefox must use its XML parser for the crash to occur. When the SGML parser is used, it doesn't crash). The example is also available under this URL: http://preisser.dynalias.org/dere1/temp/FF-Crash/index.xhtml When this URL is opened with Firefox 6.0 (or older versions) under a Windows operating system (at least Windows 7, Windows Vista and Windows XP), Firefox crashes. Expected results: Firefox shouldn't crash but render the page.

I can reproduce this. We're crashing with a stack overflow.

-> Layout

I see this in the terminal: WARNING: frame tree too deep; setting zero size and returning: file c:/dev/mozil la-central/layout/generic/nsFrame.cpp, line 4605 So we've recognized that the tree is too deep, but we still fail anyways.

fwiw, out of Firefox, Chrome, Safari and Opera we are the only one not to handle this gracefully and relatively quickly. Blocking sisyphus-crashes to indicate it shows up in automation. dupe of bug 485941 ?

(In reply to Bob Clary [:bc:] from comment #5) > fwiw, out of Firefox, Chrome, Safari and Opera we are the only one not to > handle this gracefully and relatively quickly. Blocking sisyphus-crashes to > indicate it shows up in automation. > > dupe of bug 485941 ?

Maybe!

does not crash anymore - marking as wfm