From 04581660b3b4d7dca0efb99e0b60b460933df1c2 Mon Sep 17 00:00:00 2001
From: Glenn Watson <gw@intuitionlibrary.com>
Date: Thu, 13 Aug 2015 13:53:03 +1000
Subject: [PATCH] Add fix for compositor repainting tiles on scroll layers that
 have stale clipping results.

Needed for #6643. Fixes #7153.
---
 components/layout/block.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/components/layout/block.rs b/components/layout/block.rs
index e044c04d3c0..fdfec58e776 100644
--- a/components/layout/block.rs
+++ b/components/layout/block.rs
@@ -1763,6 +1763,8 @@ impl Flow for BlockFlow {
                 (overflow_x::T::auto, _) | (overflow_x::T::scroll, _) |
                 (_, overflow_x::T::auto) | (_, overflow_x::T::scroll) => {
                     self.base.flags.insert(NEEDS_LAYER);
+                    self.base.clip = ClippingRegion::max();
+                    self.base.stacking_relative_position_of_display_port = MAX_RECT;
                 }
                 _ => {}
             }