From ab13f4a023e66d6db74985482d902348149095e9 Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Wed, 24 May 2017 17:17:42 +1000
Subject: src/lvm.js: Use 'uv.isopen' instead of assuming members

---
 src/lvm.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lvm.js b/src/lvm.js
index e796e4e..07acb42 100644
--- a/src/lvm.js
+++ b/src/lvm.js
@@ -155,7 +155,7 @@ const luaV_execute = function(L) {
             }
             case OCi.OP_SETUPVAL: {
                 let uv = cl.upvals[i.B];
-                if (uv.v !== null) {
+                if (uv.isopen()) {
                     uv.L.stack[uv.v] = L.stack[ra];
                 } else {
                     uv.value.setfrom(L.stack[ra]);
-- 
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