From 553b37ce4ff758d8cf80d48a21287526c92221c6 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 29 Dec 2020 13:38:47 -0300
Subject: Do not insert nil values into tables

---
 ltable.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ltable.c b/ltable.c
index e9410f99..e98bab71 100644
--- a/ltable.c
+++ b/ltable.c
@@ -647,6 +647,8 @@ void luaH_newkey (lua_State *L, Table *t, const TValue *key, TValue *value) {
     else if (unlikely(luai_numisnan(f)))
       luaG_runerror(L, "table index is NaN");
   }
+  if (ttisnil(value))
+    return;  /* do not insert nil values */
   mp = mainpositionTV(t, key);
   if (!isempty(gval(mp)) || isdummy(t)) {  /* main position is taken? */
     Node *othern;
-- 
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