Bug 47083 – Web Inspector: regular crashes in WebCore::RenderStyle::hasPseudoStyle(WebCore::PseudoId)

• Component: Web Inspector (Deprecated)
• Status: RESOLVED WORKSFORME

[Philippe Wittenbergh]

Created attachment 69627 [details]
Apple crash log

Possible steps to reproduce:
1. open the inspector on any page that make use of the :hover and/ or :focus pseudo class
2. inspect the node (e.g. link)
3. click on the link (and navigate away from the page)

I haven't manage to reproduce this with a minimal test case though. I do experience this regularly on a site I'm developing.

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   com.apple.WebCore             	0x00000001015bfb7e WebCore::RenderStyle::hasPseudoStyle(WebCore::PseudoId) const + 14
1   com.apple.WebCore             	0x0000000100d9729e WebCore::CSSStyleSelector::styleForElement(WebCore::Element*, WebCore::RenderStyle*, bool, bool, bool) + 1502
2   com.apple.WebCore             	0x00000001014cda32 WebCore::Node::styleForRenderer() + 82
3   com.apple.WebCore             	0x00000001014cf85f WebCore::Node::createRendererIfNeeded() + 143
4   com.apple.WebCore             	0x0000000100ec72d0 WebCore::Element::attach() + 32
5   com.apple.WebCore             	0x0000000100fcc771 WebCore::HTMLLIElement::attach() + 17

(full crash log attached)

[Simon Fraser (smfr)]

Reliable steps to reproduce would be very helpful.

[Philippe Wittenbergh]

(In reply to comment #1)
> Reliable steps to reproduce would be very helpful.

Yeah, I realise that :-).
Unfortunately, I still haven't managed to create a minimal testcase.

I have this in my stylesheet:
li {
  /* some stuff*/
  background-color: rgb(234,233,229);
  background-image: something.png;
  /* some other stuff */
}

li:hover {
  background-color: rgb(234,226,199);
}

If I take out the background-image, the crash goes away.

[Philippe Wittenbergh]

Hmmm. I can't seem to reproduce anymore (@rev 82367). Resolving as Works for Me.