bisect.js

## bisect.js
#!/usr/bin/env phantomjs
var page = require('webpage').create();
page.open("file:///Users/wpalmer/git/sizzle/t.html", function(status){
	try {
		phantom.exit(
			page.evaluate(function(){
				return window.Sizzle('p:eq("3")');
			}).length !== 0
		)
	} catch(e) {
		phantom.exit(0);
	}
});

## bisect.sh
#!/bin/bash
# 831c9c489ef90134436449b5c732f93f0a0b29bb can use quotes in :eq(...)
# 4674e7ed7f0f19bcbaaf7710ba256db374c0dd9b [random point in the past] cannot use quotes in :eq(...)
# Trying to find first commit in which quotes can be used in :eq(...)

git bisect start 831c9c489ef90134436449b5c732f93f0a0b29bb 4674e7ed7f0f19bcbaaf7710ba256db374c0dd9b
git bisect run "$(dirname "$0")/bisect.js"

# the result was af8206ff677909e61aec0158443ff74263e6265b
# however, the parent of af8206ff677909e61aec0158443ff74263e6265b does not fail silently
# At what point did we go from "silently failing" to "explicitly not working" prior to "working"?

git bisect reset
git bisect start af8206ff677909e61aec0158443ff74263e6265b^ 4674e7ed7f0f19bcbaaf7710ba256db374c0dd9b
git bisect run "$(dirname "$0")/bisect2.js"

# the result was e89d06c4134ec439e52382acd0e569e97fed7ebc

## bisect2.js

#!/usr/bin/env phantomjs
var page = require('webpage').create();
page.open("file:///Users/wpalmer/git/sizzle/t.html", function(status){
	try {
		var match = page.evaluate(function(){
			try {
				return window.Sizzle('p:eq("3")');
			} catch(e) {
				return "EX";
			}
		});

		if( match === "EX" ){
			phantom.exit(1); // explicitly not parsed
		} else {
			phantom.exit(0); // fails silently
		}
	} catch(e) {
		phantom.exit(125); //error
	}
});

## t.html
<html>
	<head>
		<script src="sizzle.js"></script>
		<title>Title</title>
	</head>
	<body>
		<div id="a">
			<h1>Header a</h1>
			<p>
				First Paragraph
			</p>
			<p>
				Second Paragraph
			</p>
		</div>
		<div id="b">
			<h1>Header b</h1>
			<p>
				Third Paragraph
			</p>
			<p>
				Fourth Paragraph
			</p>
		</div>
	</body>
</html>