显然不会保存任何东西，但是也不会报错—应用程序在这种情况下只是不会具有高速缓存。
Nothing will be saved obviously, but no errors will be given-the application will simply not have a cache in this case.
如果键入一个字母，解释程序会报错，如清单1所示。
If you type a letter, the interpreter complains, as in Listing 1.
许多应用程序注册这些事件以便用它们自己的方式报错。
Many applications register for these events to report errors in their own way.
应用推荐