php-src/Zend/tests/gh15330-004.phpt

--TEST--
GH-15330 004: Do not scan generator frames more than once
--FILE--
<?php

class Canary {
    public function __construct(public mixed $value) {}
    public function __destruct() {
        var_dump(__METHOD__);
    }
}

function g() {
    yield 'foo';
    Fiber::suspend();
}

function f($canary) {
    var_dump(yield from g());
}

$canary = new Canary(null);

$iterable = f($canary);

$fiber = new Fiber(function () use ($iterable, $canary) {
    var_dump($canary, $iterable->current());
    $iterable->next();
    var_dump("not executed");
});

$canary->value = $fiber;

$fiber->start();

$iterable->current();

$fiber = $iterable = $canary = null;

gc_collect_cycles();

?>
==DONE==
--EXPECTF--
object(Canary)#%d (1) {
  ["value"]=>
  object(Fiber)#%d (0) {
  }
}
string(3) "foo"
string(18) "Canary::__destruct"
==DONE==