Bug 102213 – Hang of Safari Web Content process

• Component: WebCore JavaScript
• Status: REOPENED

The Safari Web Content process hangs forever when I view the above URL

See attached sample

Created attachment 174133 [details]
sample of the situation

[Alexey Proskuryakov]

I cannot reproduce this with Safari 6.0.2 or current ToT.

I too can't reproduce it anymore. The given site changes constantly so the cause for this might have been gone. I regret no having saved a copy of the causing page … doesn't help the sample at least a bit?

[Alexey Proskuryakov]

This sample shows JavaScript doing a lot of work, so it might have well been a mistake in the script that caused an infinite loop of something equivalent.

Sometimes, a sample can show WebProcess stuck somewhere, but not in this case.

This bug may not be easily or directly reproducible with the URL originally given in the report but it happens to me about 4 to 5 times a day when I surf sub pages of http://www.heise.de/ especially http://www.heise.de/newsticker/ and http://www.heise.de/newsticker/foren/ subpages that I get a lock up like the one reported: the Safari web content process goes to about 100% CPU and there is no way to stop this besides quiting and relaunching the WebKit nightly. This is also the reason I can't provide you with the HTML of the causing web page (since "show html source" is no longer working). I suspect it has something to do with the ads on this page. 

So this bug is not invalid but very real. Since heise.de is a major and highly respected german tech news site releasing Safari with this bug inside might cause trouble. Even if a JS infinite loop is the cause there should be a way to stop the hanging tab or window. Therefore I reopen this bug.