Showing that nodeJS domains do not catch synchronous errors. Hence the common practice is to enclose them in process.nextTick()

caught.js

var domain = require("domain");
var d = domain.create();

d.on("error", function() {
	console.log("domain caught");
});

try {
	d.run(function() {
		process.nextTick(function() {
			throw new Error("foo");
		});
	});
} catch (err) {
	console.log("try/catch caught");
}

// result: domain caught

notcaught.js

var domain = require("domain");
var d = domain.create();

d.on("error", function() {
	console.log("domain caught");
});

try {
	d.run(function() {
		throw new Error("foo");
	});
} catch (err) {
	console.log("try/catch caught");
}

// result: try/catch caught