[php-src] Issue #11713: ext/reflection causes stack overflow under valgrind when CC=clang

Issue: https://github.com/php/php-src/issues/11713 Author: ju1ius ### Description Please refer to this [reproducer repository](https://github.com/ju1ius/php-vg-bug). Using php compiled with CC=clang and --enable-debug --with-valgrind, instanciating any Reflection object causes valgrind to crash. Here's an exerpt of the gdb backtrace: ```gdb ... the rest is just an infinite loop 0x0000000000a00f01 in object_init_ex (arg=0x1ffeffd5b8, class_type=0x4c96f20) at Zend/zend_API.c:1794 0x0000000000b06622 in zend_throw_exception_zstr (exception_ce=0x4c96f20, message=0x4dec7d0, code=0) at Zend/zend_exceptions.c:828 0x0000000000b02b06 in zend_throw_exception (exception_ce=0x4c96f20, message=0x4dec6b0 "Cannot instantiate abstract class Error", code=0) at Zend/zend_exceptions.c:848 0x00000000009f86e6 in zend_throw_error (exception_ce=0x4c96f20, format=0xd569e6 "Cannot instantiate abstract class %s") at Zend/zend.c:1714 0x0000000000a00d6c in _object_and_properties_init (arg=0x1ffeffd888, class_type=0x4c96f20, properties=0x0) at Zend/zend_API.c:1755 0x0000000000a00f01 in object_init_ex (arg=0x1ffeffd5b8, class_type=0x4c96f20) at Zend/zend_API.c:1794 0x0000000000b06622 in zend_throw_exception_zstr (exception_ce=0x4c96f20, message=0x4dec7d0, code=0) at Zend/zend_exceptions.c:828 0x0000000000b02b06 in zend_throw_exception (exception_ce=0x4c96f20, message=0x4dec6b0 "Cannot instantiate abstract class Error", code=0) at Zend/zend_exceptions.c:848 0x00000000009f86e6 in zend_throw_error (exception_ce=0x4c96f20, format=0xd569e6 "Cannot instantiate abstract class %s") at Zend/zend.c:1714 0x0000000000a00d6c in _object_and_properties_init (arg=0x1ffeffd888, class_type=0x4c96f20, properties=0x0) at Zend/zend_API.c:1755 0x0000000000a00f01 in object_init_ex (arg=0x1ffeffd888, class_type=0x4c96f20) at Zend/zend_API.c:1794 0x0000000000b06622 in zend_throw_exception_zstr (exception_ce=0x4c96f20, message=0x4dec630, code=0) at Zend/zend_exceptions.c:828 0x0000000000b02b06 in zend_throw_exception (exception_ce=0x4c96f20, message=0x4dec510 "Cannot instantiate abstract class Error", code=0) at Zend/zend_exceptions.c:848 0x00000000009f86e6 in zend_throw_error (exception_ce=0x4c96f20, format=0xd569e6 "Cannot instantiate abstract class %s") at Zend/zend.c:1714 0x0000000000a00d6c in _object_and_properties_init (arg=0x1ffeffdb58, class_type=0x4c96f20, properties=0x0) at Zend/zend_API.c:1755 0x0000000000a00f01 in object_init_ex (arg=0x1ffeffdb58, class_type=0x4c96f20) at Zend/zend_API.c:1794 0x0000000000b06622 in zend_throw_exception_zstr (exception_ce=0x4c96f20, message=0x4dec490, code=0) at Zend/zend_exceptions.c:828 0x0000000000b02b06 in zend_throw_exception (exception_ce=0x4c96f20, message=0x4dec370 "Class \"ReflectionFunction\" not found", code=0) at Zend/zend_exceptions.c:848 0x00000000009f86e6 in zend_throw_error (exception_ce=0x4c96f20, format=0xd32947 "%s") at Zend/zend.c:1714 0x00000000009dbed6 in zend_throw_or_error (fetch_type=512, exception_ce=0x0, format=0xcb23e2 "Class \"%s\" not found") at Zend/zend_execute_API.c:241 0x00000000009dc00c in report_class_fetch_error (class_name=0x4debdb0, fetch_type=512) at Zend/zend_execute_API.c:1635 0x00000000009dc1fe in zend_fetch_class_by_name (class_name=0x4debdb0, key=0x4debe20, fetch_type=512) at Zend/zend_execute_API.c:1724 0x0000000000a87861 in ZEND_NEW_SPEC_CONST_UNUSED_HANDLER (execute_data=0x4d91300) at Zend/zend_vm_execute.h:10482 0x0000000000a3a049 in execute_ex (ex=0x4d91300) at Zend/zend_vm_execute.h:56856 0x0000000000a3a3da in zend_execute (op_array=0x4deb1f0, return_value=0x0) at Zend/zend_vm_execute.h:61445 0x00000000009f920c in zend_execute_scripts (type=8, retval=0x0, file_count=3) at Zend/zend.c:1864 0x0000000000933561 in php_execute_script (primary_file=0x1fff0008f8) at main/main.c:2482 0x0000000000bc4b33 in do_cli (argc=2, argv=0x4bba7c0) at sapi/cli/php_cli.c:963 0x0000000000bc3cb9 in main (argc=2, argv=0x4bba7c0) at sapi/cli/php_cli.c:1337 ``` ### PHP Version PHP 8.3-dev ### Operating System Debian bullseye and sid