--- a/util-src/strbitop.c	Thu Oct 15 17:12:33 2020 +0200
+++ b/util-src/strbitop.c	Thu Oct 15 17:21:58 2020 +0200
@@ -20,6 +20,8 @@
 	const char *str_a = luaL_checklstring(L, 1, &a);
 	const char *str_b = luaL_checklstring(L, 2, &b);
 
+	luaL_buffinit(L, &buf);
+
 	if(a == 0 || b == 0) {
 		lua_settop(L, 1);
 		return 1;
@@ -39,6 +41,8 @@
 	const char *str_a = luaL_checklstring(L, 1, &a);
 	const char *str_b = luaL_checklstring(L, 2, &b);
 
+	luaL_buffinit(L, &buf);
+
 	if(a == 0 || b == 0) {
 		lua_settop(L, 1);
 		return 1;