All of the compositing tests that involve pagination mode on the RenderView just fail completely. They don't dump any layer trees.
Created attachment 230410 [details] Patch
Comment on attachment 230410 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=230410&action=review > Source/WebCore/rendering/RenderLayer.cpp:2065 > + location.moveBy(region->topLeftLocation() + -parentLayer->renderBox()->topLeftLocation()); + - -> -? > Source/WebCore/rendering/RenderMultiColumnSet.cpp:826 > + LayoutUnit blockOffset = initialBlockOffset + (isHorizontalWritingMode() ? -flowThreadPortion.y() : -flowThreadPortion.x()); Change the plus with two minuses into a minus? > LayoutTests/ChangeLog:10 > + * compositing/columns/composited-columns-vertical-rl.html: I don't think you meant to change this.
Fixed in r167965.
This change broke fast/multicol/mixed-positioning-stacking-order.html on WebKit2 bots: http://build.webkit.org/results/Apple%20Mavericks%20Release%20WK2%20(Tests)/r167977%20(5329)/fast/multicol/mixed-positioning-stacking-order-diffs.html
(In reply to comment #4) > This change broke fast/multicol/mixed-positioning-stacking-order.html on WebKit2 bots: > > http://build.webkit.org/results/Apple%20Mavericks%20Release%20WK2%20(Tests)/r167977%20(5329)/fast/multicol/mixed-positioning-stacking-order-diffs.html That's a progression, but I don't like how the test is rendering, so will probably try to find a way to keep compositing from happening. Let me come up with a tweak.