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Assertion !EG(exception) in ZEND_FE_FREE when unpacking a generator into a by-ref parameter throws #25313
Description
Description
The following code:
<?php
set_error_handler(function($n, $s) { throw new Exception($s); });
function test($a, $b, $c, &$ref) {}
function gen($array) { foreach ($array as $e) yield $e; }
test(...gen([1, 2]), ...gen([3, 4]));Resulted in this output:
php: Zend/zend_vm_execute.h:15738: const zend_op *ZEND_FE_FREE_SPEC_TMPVAR_HANDLER(zend_execute_data *, const zend_op *): Assertion `!((&_tsrm_ls_cache)->eg.exception)' failed.
Aborted (core dumped)
To reproduce: ./sapi/cli/php test.php
Commit:
33a61f765a94e018a8d55d962a73e8c8331ee256
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-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-pcre-jit --with-iconv
Operating System:
Ubuntu 20.04 Host, Docker 0599jiangyc/flowfusion:latest
This report is automatically generated by FlowFusion
PHP Version
nightly
Operating System
No response
Activity
ndossche commentedon Nov 8, 2026
Reproduces in 8.4+.