From 799d59d88fb8b0aa325415ba8f0c938b5628a757 Mon Sep 17 00:00:00 2001
From: peter chang <pchang@mozilla.com>
Date: Mon, 2 Oct 2017 21:49:21 +0800
Subject: [PATCH] Bug 1377894 - Create the new opacity animations only when the
 animation id is valid, r=kats

MozReview-Commit-ID: 1njXoEnyj00

--HG--
extra : rebase_source : 43b9d5451f06de2148f6c7a7228dbcc609c038b3
---
 gfx/webrender_bindings/src/bindings.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gfx/webrender_bindings/src/bindings.rs b/gfx/webrender_bindings/src/bindings.rs
index b23f3bb6e95d..4668b8c1ffe2 100644
--- a/gfx/webrender_bindings/src/bindings.rs
+++ b/gfx/webrender_bindings/src/bindings.rs
@@ -1144,7 +1144,9 @@ pub extern "C" fn wr_dp_push_stacking_context(state: &mut WrState,
             filters.push(FilterOp::Opacity(PropertyBinding::Value(*opacity)));
         }
     } else {
-        filters.push(FilterOp::Opacity(PropertyBinding::Binding(PropertyBindingKey::new(animation_id))));
+        if animation_id > 0 {
+            filters.push(FilterOp::Opacity(PropertyBinding::Binding(PropertyBindingKey::new(animation_id))));
+        }
     }
 
     let transform = unsafe { transform.as_ref() };