From 5cfc725a8b61a6f96c7324f60ac26739315095ba Mon Sep 17 00:00:00 2001 From: Roberto I Date: Sun, 4 Jan 2026 16:39:22 -0300 Subject: Special case for 'string.rep' over an empty string --- lauxlib.h | 6 +++--- lstrlib.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/lauxlib.h b/lauxlib.h index 7f1d3ca1..2d015362 100644 --- a/lauxlib.h +++ b/lauxlib.h @@ -81,8 +81,8 @@ LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def, LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname); LUALIB_API int (luaL_execresult) (lua_State *L, int stat); -LUALIB_API void *luaL_alloc (void *ud, void *ptr, size_t osize, - size_t nsize); +LUALIB_API void *(luaL_alloc) (void *ud, void *ptr, size_t osize, + size_t nsize); /* predefined references */ @@ -103,7 +103,7 @@ LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s); LUALIB_API lua_State *(luaL_newstate) (void); -LUALIB_API unsigned luaL_makeseed (lua_State *L); +LUALIB_API unsigned (luaL_makeseed) (lua_State *L); LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx); diff --git a/lstrlib.c b/lstrlib.c index 06ea10d9..874cec80 100644 --- a/lstrlib.c +++ b/lstrlib.c @@ -141,8 +141,8 @@ static int str_rep (lua_State *L) { const char *s = luaL_checklstring(L, 1, &len); lua_Integer n = luaL_checkinteger(L, 2); const char *sep = luaL_optlstring(L, 3, "", &lsep); - if (n <= 0) - lua_pushliteral(L, ""); + if (n <= 0 || (len | lsep) == 0) + lua_pushliteral(L, ""); /* no repetitions or both strings empty */ else if (l_unlikely(len > MAX_SIZE - lsep || cast_st2S(len + lsep) > cast_st2S(MAX_SIZE) / n)) return luaL_error(L, "resulting string too large"); -- cgit v1.2.3-55-g6feb