'string.pack("cn")' does not accept strings longer than 'n'
diff --git a/lstrlib.c b/lstrlib.c
index 06f688a..9ba16a5 100644
--- a/lstrlib.c
+++ b/lstrlib.c
@@ -1,5 +1,5 @@
/*
-** $Id: lstrlib.c,v 1.248 2016/05/02 13:58:01 roberto Exp roberto $
+** $Id: lstrlib.c,v 1.249 2016/05/13 19:09:46 roberto Exp roberto $
** Standard library for string operations and pattern-matching
** See Copyright Notice in lua.h
*/
@@ -1369,13 +1369,11 @@
case Kchar: { /* fixed-size string */
size_t len;
const char *s = luaL_checklstring(L, arg, &len);
- if ((size_t)size <= len) /* string larger than (or equal to) needed? */
- luaL_addlstring(&b, s, size); /* truncate string to asked size */
- else { /* string smaller than needed */
- luaL_addlstring(&b, s, len); /* add it all */
- while (len++ < (size_t)size) /* pad extra space */
- luaL_addchar(&b, LUAL_PACKPADBYTE);
- }
+ luaL_argcheck(L, len <= (size_t)size, arg,
+ "string longer than given size");
+ luaL_addlstring(&b, s, len); /* add string */
+ while (len++ < (size_t)size) /* pad extra space */
+ luaL_addchar(&b, LUAL_PACKPADBYTE);
break;
}
case Kstring: { /* strings with length count */
