XPath::Step::nodesInAxis(): add null checks after Attr::ownerElement() calls
Created attachment 449780 [details] Patch
This patch modifies the imported WPT tests. Please ensure that any changes on the tests (not coming from a WPT import) are exported to WPT. Please see https://trac.webkit.org/wiki/WPTExportProcess
Committed r288589 (246411@trunk): <https://commits.webkit.org/246411@trunk>
Thank you Darin!
<rdar://problem/88050706>