Exceptions thrown during yield operation fall through the generator instead of being handled within

[bwoebi]

Description

The following code:

<?php

set_error_handler(function() { throw new \Error(); });

function &gen() {
    try {
        yield 1;
    } catch (Error $e) {
        print "Caught";
    }
}

foreach (gen() as $y);

Resulted in Uncaught Error

But I expected this output instead:

Caught

return_by_ref has the same problem, it seems to me, however in generators there's the additional case of exceptions in destructors of previous key and values.

I wouldn't change the longstanding behaviour in current PHP versions, but should be fixed for PHP 8.2 possibly, for academical correctness at least.

PHP Version

master

Operating System

No response

[cmb69]

Confirmed.

[damianwadley]

Note that return statements behave the same.

[alex-kalanis]

Similar problem but another point - call non-exitent trait in autoloading throws an un-catchable exception - even when it's expected.

My testing repo: https://github.com/alex-kalanis/autoload_testing
Travis check of original repo: https://github.com/alex-kalanis/kw_autoload/runs/5751725521