Description:
------------
If finally blocks are nested, odd behaviour arises with exceptions. The attached example demonstrates an exception being thrown and never being caught, even though there's an appropriate catch block.

While 5.5 behaves worse, e.g. you end up with an exception you can't catch, this behaviour is still present in 5.6 and 7:
http://3v4l.org/3UF6O



Test script:
---------------
try {
    echo "Outer try\n";
    try {
        echo "  Middle try\n";
        throw new Exception();
    } finally {
        echo "  Middle finally\n";
            try {
                echo "    Inner try\n";
            } finally {
                echo "    Inner finally\n";
            }
    }
    echo "Outer shouldnt get here\n";
} catch (Exception $e) {
    echo "Outer catch\n";
} finally {
    echo "Outer finally\n";
}

Expected result:
----------------
Outer try
  Middle try
  Middle finally
    Inner try
    Inner finally
Outer catch
Outer finally

Actual result:
--------------
Outer try
  Middle try
  Middle finally
    Inner try
    Inner finally
Outer shouldnt get here
Outer finally