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-rw-r--r--src/lapi.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lapi.js b/src/lapi.js
index 529a009..42e87a9 100644
--- a/src/lapi.js
+++ b/src/lapi.js
@@ -1108,8 +1108,8 @@ const lua_upvaluejoin = function(L, fidx1, n1, fidx2, n2) {
let up1 = ref1.upvalOff;
let up2 = ref2.upval;
let f1 = ref1.closure;
-
f1.upvals[up1] = up2;
+ up2.refcount++;
};
// This functions are only there for compatibility purposes