1041880 - Use GetParentElementCrossingShadow() when initializing style scopes

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, defect)

Description

[William Chen [:wchen]]

Attachment: Assertion stack

While debugging a test case in bug 1022866, I run into an assertion in TreeMatchContext::AssertHasAllStyleScopes, where mStyleScopes is missing a shadow root-crossing ancestor of a node in a shadow tree.

In TreeMatchContext::InitStyleScopes, we cross the shadow root boundary when traversing the parent chain, but in InitStyleScopes in nsStyleSet.cpp, we do not cross the boundary when obtaining the parent element.

Comment 1

[William Chen [:wchen]]

Attachment: Use GetParentElementCrossingShadow() when initializing style scopes.

Comment 2

[William Chen [:wchen]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/16ab083beab4

Comment 3

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/16ab083beab4