Function checkstack

extlibs/lua/src/ldblib.c:35–38

** If L1 != L, L1 can be in any state, and therefore there are no ** guarantees about its stack space; any push in L1 must be ** checked. */

** checked.
*/
static void checkstack (lua_State *L, lua_State *L1, int n) {
  if (L != L1 && !lua_checkstack(L1, n))
    luaL_error(L, "stack overflow");
}


static int db_getregistry (lua_State *L) {