Created attachment 108536 [details] Testcase for multicol If you have an element with an outline set that is displayed either in a region or a column, the sides of the outline do not display.
Created attachment 108537 [details] Testcase for regions
<rdar://problem/10218167>
Created attachment 109813 [details] Patch
Fixing this for multicol is really a separate bug. The attached patch fixes the issue for regions. I want to re-implement columns using regions anyway. :)
Comment on attachment 109813 [details] Patch Does the test case cover all the changes?
It does yes. Outline spilling out to the top/left gives you a negative overflow and tests the subsequent changes to translation and clipping.
Regions fix landed in r96718. Cutting regions tracking bug dependency and leaving open for a multi-column fix.