Assertion failure in check_node_running_in_fiber() when resuming a generator inside a Fiber destructor #20615
Description
Description
The following code:
<?php
class a {
static $b;
static $max = 5.;
function __destruct() {
$a = new a;
static $gen = (function() {
$from = (function () {
$a = new a;
yield;
})();
try {
yield from $from;
} finally {
}
})();
$fiber = new Fiber(function () use ($gen, &$fiber) {
$gen->next();
});
$fiber->start();
}
}
new a;Resulted in this output:
php: /path/to/php-src/Zend/zend_generators.c:217: _Bool check_node_running_in_fiber(zend_generator *): Assertion `generator->execute_data' failed.
Aborted
Commit:
56795d2810e
Build configuration:
CC="clang" CXX="clang++" CFLAGS="-fsanitize=address -g -O0" CXXFLAGS="-fsanitize=address -g -O0" LDFLAGS="-fsanitize=address" ./buildconf --force && ./configure --enable-debug --enable-address-sanitizer --disable-shared --with-pic --enable-mbstring --with-zlib
PHP Version
PHP 8.6.0-dev (cli) (built: Nov 29 2025 14:32:34) (NTS DEBUG)
Copyright (c) The PHP Group
Zend Engine v4.6.0-dev, Copyright (c) Zend Technologies
with Zend OPcache v8.6.0-dev, Copyright (c), by Zend Technologies
Operating System
Ubuntu 22.04