Created attachment 235808 [details]
1. Open the attached file in the nightly build of WebKit
2. Find "hello" via Cmd+F.
"hello" is highlighted
The yellow highlight shows up on the left of "hello".
The problem here is that RenderMultiColumnFlowThread::mapFromFlowToRegion doesn't add the layer offset when computing the translation offset despite the fact RenderMultiColumnSet::columnTranslationForOffset returns an offset from the layer's top left corner.
This is in contract to RenderLayer::collectFragments. It calls RenderMultiColumnSet::collectLayerFragments, which also returns an offset from the layer's top left corner, but it adds the layer offset so everything is fine there.
I found the issue and I have a fix. Working on the patch ATM.
Created attachment 235829 [details]
Comment on attachment 235829 [details]
Clearing flags on attachment: 235829
Committed r171882: <http://trac.webkit.org/changeset/171882>
All reviewed patches have been landed. Closing bug.
*** Bug 135453 has been marked as a duplicate of this bug. ***