Created attachment 228223 [details]
Steps to reproduce:
1. Launch the attached accessible-event listener in a terminal
2. Launch the test case in GtkLauncher or MiniBrowser
3. Resize the browser window so that the text wraps, splitting "text-based" from "setup"
4. Tab to give focus to the link in the test case
Expected results: GtkLauncher/MiniBrowser's WebKit process would not hang.
Actual results: GtkLauncher/MiniBrowser's WebKit process hangs.
Important: If in step 3 you do not have the text split/wrapped as described, there will not be a hang. Changing other aspects of the test case (e.g. the style, removing the final div's text, removing the whitespace in the source before setup) also makes the hang go away. Seems you need just the right combination of things, but when you have them the hang is 100% reliable.
Created attachment 228224 [details]