From f6aada937712f84af887592946541511c4d6055e Mon Sep 17 00:00:00 2001
From: Larry Ewing <lewing@microsoft.com>
Date: Mon, 22 Jun 2020 15:33:53 -0500
Subject: [PATCH] Don't assume SharedArrayBuffer exists.

---
 src/mono/wasm/runtime/binding_support.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mono/wasm/runtime/binding_support.js b/src/mono/wasm/runtime/binding_support.js
index 77167b695a73a..6d18dbfac4e04 100644
--- a/src/mono/wasm/runtime/binding_support.js
+++ b/src/mono/wasm/runtime/binding_support.js
@@ -36,7 +36,8 @@ var BindingSupportLib = {
 			DataView.prototype[Symbol.for("wasm type")] = 3;
 			Function.prototype[Symbol.for("wasm type")] =  4;
 			Map.prototype[Symbol.for("wasm type")] = 5;
-			SharedArrayBuffer.prototype[Symbol.for("wasm type")] =  6;
+			if (typeof SharedArrayBuffer !== "undefined")
+				SharedArrayBuffer.prototype[Symbol.for("wasm type")] =  6;
 			Int8Array.prototype[Symbol.for("wasm type")] = 10;
 			Uint8Array.prototype[Symbol.for("wasm type")] = 11;
 			Uint8ClampedArray.prototype[Symbol.for("wasm type")] = 12;