From 8ec76186334df9dc87fc8aa7aa5edc84d977d776 Mon Sep 17 00:00:00 2001
From: sotaro <sotaro.ikeda.g@gmail.com>
Date: Fri, 14 Feb 2020 10:46:53 +0100
Subject: [Layers] Clear WrappingTextureSourceYCbCrBasic::mTexture correctly

---
 gfx/layers/composite/TextureHost.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gfx/layers/composite/TextureHost.cpp b/gfx/layers/composite/TextureHost.cpp
index b342f1d18..8df7af4a8 100644
--- a/gfx/layers/composite/TextureHost.cpp
+++ b/gfx/layers/composite/TextureHost.cpp
@@ -555,6 +555,14 @@ void
 BufferTextureHost::DeallocateDeviceData()
 {
   if (mFirstSource && mFirstSource->NumCompositableRefs() > 0) {
+    // WrappingTextureSourceYCbCrBasic wraps YUV format BufferTextureHost.
+    // When BufferTextureHost is destroyed, data of
+    // WrappingTextureSourceYCbCrBasic becomes invalid.
+    if (mFirstSource->AsWrappingTextureSourceYCbCrBasic() &&
+        mFirstSource->IsOwnedBy(this)) {
+      mFirstSource->SetOwner(nullptr);
+      mFirstSource->DeallocateDeviceData();
+    }
     return;
   }
 
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