Description:
------------
The finally block in the example generator below is not being executed after delegating to another generator with yield from.

Test script:
---------------
#!/usr/bin/env php
<?php

function gen1() {
    yield 1;
    yield 2;
    yield 3;
    return true;
}

function gen2() {
    try {
        echo "Entered try/catch\n";
        yield from gen1();
    } finally {
        echo "Finally\n";
    }
};

$generator = gen2();

echo $generator->current(), "\n";

unset($generator);

echo "Done\n";


Expected result:
----------------
Entered try/catch
1
Finally
Done

Actual result:
--------------
Entered try/catch
1
Done