---
 src/lstrlib.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: lua-5.5.0/src/lstrlib.c
===================================================================
--- lua-5.5.0.orig/src/lstrlib.c	2025-12-15 11:44:40.000000000 +0100
+++ lua-5.5.0/src/lstrlib.c	2025-12-31 13:24:10.526974226 +0100
@@ -144,7 +144,7 @@
   if (n <= 0)
     lua_pushliteral(L, "");
   else if (l_unlikely(len > MAX_SIZE - lsep ||
-               cast_st2S(len + lsep) > cast_st2S(MAX_SIZE) / n))
+                (len + lsep > 0 && n > cast_st2S(MAX_SIZE) / cast_st2S(len + lsep))))
     return luaL_error(L, "resulting string too large");
   else {
     size_t totallen = (cast_sizet(n) * (len + lsep)) - lsep;
@@ -1726,7 +1726,7 @@
     luaL_argcheck(L, opt != Kstring && opt != Kzstr, 1,
                      "variable-length format");
     size += ntoalign;  /* total space used by option */
-    luaL_argcheck(L, totalsize <= LUA_MAXINTEGER - size,
+    luaL_argcheck(L, totalsize <= MAX_SIZE - size,
                      1, "format result too large");
     totalsize += size;
   }