Function checktoclose

xrepo/packages/l/lua/port/lua/src/lparser.c:1717–1722

static void checktoclose (FuncState *fs, int level) {
  if (level != -1) {  /* is there a to-be-closed variable? */
    marktobeclosed(fs);
    luaK_codeABC(fs, OP_TBC, reglevel(fs, level), 0, 0);
  }
}


static void localstat (LexState *ls) {