jquery getScript函数永远不会失败？

永远不会调用jQuery getScript失败函数.看到这个小提琴：
http://jsfiddle.net/getsetbro/8xNMs/

$.getScript("http://api.jquery.com/scripts/jquery.NO-SUCH-FILE.js").done(function() {
    console.log('yep');
}).fail(function() {
    console.log('fail function does not fire fine');
});

永远不会调用完整的函数：
http://jsfiddle.net/getsetbro/ns6yQ/

$.ajax({
    url: url,type: 'get',crossDomain: true,dataType: 'script',async:false,cache:false,success: function(result) {
        console.log('SUCCESS');
    },error: function(result) {
        console.log('ERROR');
    },complete: function(result) {
        console.log('COMPLETE');
    }
})

哦,在IE中它实际上会触发SUCCESS和COMPLETE它应该失败. = [

解决方法

.fail不适用于跨域请求.

// Bind script tag hack transport
jQuery.ajaxTransport( "script",function(s) {

    // This transport only deals with cross domain requests
    if ( s.crossDomain ) {
    ...
    script = document.createElement( "script" );

脚本元素不会触发错误等.

但它适用于同一个域名. http://jsfiddle.net/8xNMs/2/