[php-src] Issue #12623: Segmentation fault in ZEND_DO_UCALL_SPEC_RETVAL_USED_HANDLER

Issue: https://github.com/php/php-src/issues/12623 Author: pfustc ### Description Hi @dstogov, I see another segmentation fault issue on x86 while running phpunit tests. It's reproducible with CALL VM and GCC global regs disabled. Please follow below steps to reproduce. **1. Configure and build php** ```bash $ cd /tmp $ git clone git@github.com:php/php-src.git $ cd php-src $ php Zend/zend_vm_gen.php --with-vm-kind=CALL $ bash buildconf $ bash configure --enable-debug --enable-bcmath --enable-dba --enable-fpm --enable-ftp --enable-gd \ --enable-mbstring --enable-xmlreader --disable-gcc-global-regs $ make -j 50 $ make install ``` **2. Build phpunit** ```bash $ cd /tmp $ git clone https://github.com/sebastianbergmann/phpunit.git $ cd phpunit $ composer install ``` **3. Run with some options** ```bash $ php -d opcache.enable_cli=1 -d opcache.jit=1205 -d opcache.jit_buffer_size=128M \ -d opcache.protect_memory=1 ./phpunit Segmentation fault (core dumped) ``` Some GDB output ```gdb Program received signal SIGSEGV, Segmentation fault. 0x0000555555bbd5f2 in ZEND_DO_UCALL_SPEC_RETVAL_USED_HANDLER (execute_data=0x7ffff5417c00) at /home/penli01/php-src/Zend/zend_vm_execute.h:1570 1570 zend_function *fbc = call->func; (gdb) l 1565 1566 static ZEND_OPCODE_HANDLER_RET ZEND_FASTCALL ZEND_DO_UCALL_SPEC_RETVAL_USED_HANDLER(ZEND_OPCODE_HANDLER_ARGS) 1567 { 1568 USE_OPLINE 1569 zend_execute_data *call = EX(call); 1570 zend_function *fbc = call->func; 1571 zval *ret; 1572 1573 SAVE_OPLINE(); 1574 EX(call) = call->prev_execute_data; (gdb) p call $1 = (zend_execute_data *) 0x0 ``` ### PHP Version master @ https://github.com/php/php-src/commit/c15988aab3865c6c3f99b4564a641c7316bb5518 ### Operating System Ubuntu 22.04