Get current stack and line number in JavaScript

currentStackAndLine.js

// For V8:
// Define global variable `__stack__` and `__line`
// for current stack and line
(function(global){
    Object.defineProperty(global, '__stack__', {
        get: function(){
            var orig = Error.prepareStackTrace;
            Error.prepareStackTrace = function(_, stack){ return stack; };
            var err = new Error;
            Error.captureStackTrace(err, arguments.callee);
            var stack = err.stack;
            Error.prepareStackTrace = orig;
            return stack;
        }
    });

    Object.defineProperty(global, '__line__', {
        get: function(){
            return __stack__[1].getLineNumber();
        }
    });
})(this);


// For non-V8:
// but can not continue current excution
(function(global){
    var old = global.onerror;

    global.onerror = function(errMsg, url, line){
        var oldReturn;
        if(old) oldReturn = old.apply(global, arguments);
        if(errMsg.indexOf('Get current line number') === -1) return;

        console.log(line);

        // if old error handler has return value, return it
        if(oldReturn !== void 0){ // evaluate `undefined` that is not in global
            return oldReturn;
        }

        // You can return `true` or `false` to prevent unexpected default behavior,
        // for more detail: http://stackoverflow.com/questions/8087240/if-i-override-window-onerror-in-javascript-should-i-return-true-or-false
    };
})(this);
// Get current line number by such:
// throw new Error('Get current line number');