From d271095e288a5d23558a4ad06fccab22135b8942 Mon Sep 17 00:00:00 2001
From: Daniel Imms <daimms@microsoft.com>
Date: Thu, 6 Jun 2019 15:05:34 -0700
Subject: [PATCH] Freeze DEFAULT_ATTR_DATA to hard fail when not cloned

---
 src/core/buffer/BufferLine.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/buffer/BufferLine.ts b/src/core/buffer/BufferLine.ts
index ce3b54b7..91c3a8d1 100644
--- a/src/core/buffer/BufferLine.ts
+++ b/src/core/buffer/BufferLine.ts
@@ -217,7 +217,7 @@ export class AttributeData implements IAttributeData {
   }
 }
 
-export const DEFAULT_ATTR_DATA = new AttributeData();
+export const DEFAULT_ATTR_DATA = Object.freeze(new AttributeData());
 
 /**
  * CellData - represents a single Cell in the terminal buffer.