Repository navigation
Assertion failure zend_weakref_unregister(zend_object *, void *, _Bool): Assertion 'tagged_ptr && "Weakref not registered?"' failed #22650
Description
Description
The following code:
<?php
try {
function garbageCollectionTrigger() {
for ($i = 0; $i < 10000; $i++) {
$obj = new stdClass();
$weakReferences[] = WeakReference::create($obj);
garbageCollectionTrigger();
$root = $document->createElement('root');
$document = new DomDocument();
}
gc_collect_cycles();
}
garbageCollectionTrigger();
} catch (\Throwable $_ffl_e) {}Resulted in this output:
php: /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/Zend/zend_weakrefs.c:126: void zend_weakref_unregister(zend_object *, void *, _Bool): Assertion `tagged_ptr && "Weakref not registered?"' failed.
Aborted (core dumped)
To reproduce:
/home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php ./test.php
Commit:
9dc29aafa5eecc71a9f9e2c7607b588597a91810
Configurations:
CC="clang-12" CXX="clang++-12" CFLAGS="-DZEND_VERIFY_TYPE_INFERENCE" CXXFLAGS="-DZEND_VERIFY_TYPE_INFERENCE" ./configure --enable-debug --enable-address-sanitizer --enable-undefined-sanitizer --enable-re2c-cgoto --enable-fpm --enable-litespeed --enable-phpdbg-debug --enable-zts --enable-bcmath --enable-calendar --enable-dba --enable-dl-test --enable-exif --enable-ftp --enable-gd --enable-gd-jis-conv --enable-mbstring --enable-pcntl --enable-shmop --enable-soap --enable-sockets --enable-sysvmsg --enable-zend-test --with-zlib --with-bz2 --with-curl --with-enchant --with-gettext --with-gmp --with-mhash --with-ldap --with-libedit --with-readline --with-snmp --with-sodium --with-xsl --with-zip --with-mysqli --with-pdo-mysql --with-pdo-pgsql --with-pgsql --with-sqlite3 --with-pdo-sqlite --with-webp --with-jpeg --with-freetype --enable-sigchild --with-readline --with-pcre-jit --with-iconv
Operating System:
Ubuntu 20.04 Host, Docker 0599jiangyc/flowfusion:latest
This bug was found by fusion-fuzz
PHP Version
nightly
Operating System
No response
Activity
zhalker commentedon Jul 9, 2026
@YuanchengJiang I look at this and I have only one question, why?
ndossche commentedon Jul 9, 2026
Same bug class as #15867, essentially all a dupe of the OOM weakref inconsistency issues.
ndossche commentedon Oct 25, 2026
This issue is fixed as a consequence of the general graceful OOM handling, closing.