1 files changed, 4 insertions, 2 deletions
diff --git a/src/lfunc.js b/src/lfunc.js
index 39ad049..c309147 100644
--- a/src/lfunc.js
+++ b/src/lfunc.js
@@ -40,8 +40,10 @@ class UpVal {
     }
 
     setval(L, ra) {
-        if (this.v !== null) this.v = ra;
-        else this.u.value = L.stack[ra];
+        if (this.v !== null) {
+            L.stack[this.v] = L.stack[ra];
+            this.v = ra;
+        } else this.u.value = L.stack[ra];
     }
 
     isopen() {