Test case for Seg Fault in asynchronous calls to endure from couchnode library

test.js

var couchbase = require('couchbase'),
  async = require('async'),
  couchbaseConfig = {
		debug: process.env.COUCHBASE_DEBUG || true,
		user: process.env.COUCHBASE_USER || '',
		password: process.env.COUCHBASE_PASSWORD || '',
		bucket: process.env.COUCHBASE_BUCKET || 'default'
	},
	async = require('async'),
	defaultHost = 'localhost:8091',
	bucket = null,
	couchbase = require('couchbase');

if (process.env.COUCHBASE_HOSTS) {
	couchbaseConfig.hosts = process.env.COUCHBASE_HOSTS.split(',');
} else {
	if (process.env.COUCHBASE_HOST) {
		couchbaseConfig.hosts =  [ process.env.COUCHBASE_HOST ];
	} else {
		console.log('Warning: no COUCHBASE_HOSTS specified - Using ' + defaultHost);
		couchbaseConfig.hosts = [ defaultHost ];
	}
}

couchbase.connect(couchbaseConfig, function (err, bkt) {
	// create documents

	var longString = "", i, tests = [];
	for (i=0; i < 5000; i++) {
		longString += 'a';
	}
	for (i=1; i < 10; i++) {
		tests.push('test::' + i);
	}
	// store object
	async.each(tests, function(item, callback) {
		console.log('Creating item ' + item);
		bkt.set(item, {
			id: item,
			otherItem: 'test',
			longString: longString
		}, function(err, meta) {
			if (err) {
				console.log('Error creating test data ' + item + ' : ' + JSON.stringify(err));
				return callback(err);
			}
			console.log('Item created');

			bkt.endure(item, {persisted: 1, replicated: 0}, function(err, meta) {
				if (err) {
					return callback(err, null);
				}
				console.log('Item persisted');
				callback();
			});
		});
	},function(err) {
		if (err) {
			console.log('Error creating items : ' + err);
			setTimeout(function() {
				process.exit(-1);
			},500);
		} else {
			// delete items
			async.each(tests, function(item, callback) {
				if (err) {
					console.log('Error creating test data ' + item + ' : ' + JSON.stringify(err));
					return callback(err);
				}
				bkt.remove(item, function(err, meta) {
					callback();
				});
			}, function(err) {
				console.log('Completed deletion of items');
				setTimeout(function() {
					process.exit(1);
				},50);
			});
		}
	});
});

If you switch line 36 to async.eachSeries(tests, function(item, callback) { the segfault goes away.