JSTests/stress/generator-throw-before-first-call.js

function unreachable()
{
    throw new Error("NG");
}

function *gen()
{
    unreachable();
}

var g = gen();
var error = new Error("OK");
var thrown = null;
try {
    g.throw(error);
} catch (e) {
    thrown = e;
}
if (thrown !== error)
    unreachable();