phantomQueryError.js

var page = require('webpage').create();

page.onConsoleMessage = function(msg) {
    console.log('CONSOLE: ' + msg);
};

page.onError = function(msg, trace) {
    console.log('ERROR: ' + msg + (trace ? ("trace: " + JSON.stringify(trace)) : ""));
};

page.content = "<div id='a'>some text</div><p id='b'>more text</p>";

setTimeout(function(){
	page.evaluate(function(){
		console.log(!!document.querySelector("div#a")); // true
		console.log(!!document.querySelector("div[id='a']")); // true
		console.log(!!document.querySelector("div:not([id='a'])")); // false
		console.log(!!document.querySelector("p:not([id='a'])")); // true
		console.log(!!document.querySelector("div[id!='a']")); // error
	});
}, 1000);

setTimeout(function(){
	phantom.exit();
}, 2000);