From 0da6d320f757bc9241a33df06f3597598845cf0a Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 28 Apr 2026 13:44:29 -0300
Subject: [PATCH] Details

---
 lcode.c      | 8 ++++----
 makefile     | 9 +++++++--
 manual/2html | 2 +-
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/lcode.c b/lcode.c
index 33cbd687..e0024432 100644
--- a/lcode.c
+++ b/lcode.c
@@ -663,11 +663,11 @@ static int boolT (FuncState *fs) {
 ** Add nil to list of constants and return its index.
 */
 static int nilK (FuncState *fs) {
-  TValue k, v;
-  setnilvalue(&v);
+  lua_State *L = fs->ls->L;
+  TValue k;
   /* cannot use nil as key; instead use table itself */
-  sethvalue(fs->ls->L, &k, fs->kcache);
-  return k2proto(fs, &k, &v);
+  sethvalue(L, &k, fs->kcache);
+  return k2proto(fs, &k, &G(L)->nilvalue);
 }
 
 
diff --git a/makefile b/makefile
index fa165bca..8144dcb6 100644
--- a/makefile
+++ b/makefile
@@ -62,8 +62,11 @@ CWARNS= $(CWARNSCPP) $(CWARNSC) $(CWARNGCC)
 # ASAN_OPTIONS="detect_invalid_pointer_pairs=2".
 # -fsanitize=undefined  (you may need to add "-lubsan" to libs)
 # -fsanitize=pointer-subtract -fsanitize=address -fsanitize=pointer-compare
-# TESTS= -DLUA_USER_H='"ltests.h"' -Og -g
 
+# Test mode: Add test library, turn on asserts, redefine several
+# constants ("to give some bugs a chance"), track memory use, and add
+# debug information.
+# TESTS= -DLUA_USER_H='"ltests.h"' -Og -g
 
 LOCAL = $(TESTS) $(CWARNS)
 
@@ -71,13 +74,15 @@ LOCAL = $(TESTS) $(CWARNS)
 # To enable Linux goodies, -DLUA_USE_LINUX
 # For C89, "-std=c89 -DLUA_USE_C89"
 # Note that Linux/Posix options are not compatible with C89
+# (For 32-bit, add option "-m32" to MYCFLAGS and MYLDFLAGS.)
 MYCFLAGS= $(LOCAL) -std=c99 -DLUA_USE_LINUX
 MYLDFLAGS= -Wl,-E
 MYLIBS= -ldl
 
 
 CC= gcc
-CFLAGS= -Wall -O2 $(MYCFLAGS) -fno-stack-protector -fno-common -march=native
+# (Optionally we can use -march=native -mno-avx512f.)
+CFLAGS= -Wall -O2 $(MYCFLAGS) -fno-stack-protector -fno-common
 AR= ar rc
 RANLIB= ranlib
 RM= rm -f
diff --git a/manual/2html b/manual/2html
index d3b88b34..243f3f22 100755
--- a/manual/2html
+++ b/manual/2html
@@ -1,4 +1,4 @@
-#!/usr/bin/env lua5.3
+#!/usr/bin/env lua
 
 
 -- special marks: