Bug #78937 [Opn->Csd]: Preloading unlinkable anonymous class can segfault

Edit report at https://bugs.php.net/bug.php?id=78937&edit=1 ID: 78937 Updated by: dmitry@php.net Reported by: cmb@php.net Summary: Preloading unlinkable anonymous class can segfault -Status: Open +Status: Closed Type: Bug Package: opcache Operating System: * PHP Version: 7.4Git-2019-12-09 (Git) Block user comment: N Private report: N New Comment: Automatic comment on behalf of dmitry@zend.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=20ef51db22c46fd45976eb6d0b780c14022c8873 Log: Fixed bug #78937 (Preloading unlinkable anonymous class can segfault) Previous Comments: ------------------------------------------------------------------------ [2019-12-09 16:37:55] cmb@php.net Additional info: the preloader uses opcache_compile_file() to preload preload.inc, and the error log shows: PHP Warning: Can't preload already declared class class@anonymous in … ------------------------------------------------------------------------ [2019-12-09 13:36:30] cmb@php.net Description: ------------ When code is preloaded which uses unlinkable anonymous classes, PHP can crash. When running the test script in debug mode with r42a2fb8, I hit an assertion failure: php7_debug.dll!ZEND_DECLARE_ANON_CLASS_SPEC_HANDLER(_zend_execute_data * execute_data) Line 2449 (c:\php-sdk\phpdev\vc15\x64\php-src-7.4\Zend\zend_vm_execute.h:2449) php7_debug.dll!execute_ex(_zend_execute_data * ex) Line 53379 (c:\php-sdk\phpdev\vc15\x64\php-src-7.4\Zend\zend_vm_execute.h:53379) php7_debug.dll!zend_execute(_zend_op_array * op_array, _zval_struct * return_value) Line 57665 (c:\php-sdk\phpdev\vc15\x64\php-src-7.4\Zend\zend_vm_execute.h:57665) php7_debug.dll!zend_execute_scripts(int type, _zval_struct * retval, int file_count, ...) Line 1664 (c:\php-sdk\phpdev\vc15\x64\php-src-7.4\Zend\zend.c:1664) php7_debug.dll!php_execute_script(_zend_file_handle * primary_file) Line 2619 (c:\php-sdk\phpdev\vc15\x64\php-src-7.4\main\main.c:2619) php.exe!do_cli(int argc, char * * argv) Line 962 (c:\php-sdk\phpdev\vc15\x64\php-src-7.4\sapi\cli\php_cli.c:962) php.exe!main(int argc, char * * argv) Line 1352 (c:\php-sdk\phpdev\vc15\x64\php-src-7.4\sapi\cli\php_cli.c:1352) Test script: --------------- preload.inc <?php function foo() { return new class extends Bar {}; } ?> test.php <?php var_dump(foo()->test()); ?> Expected result: ---------------- object(class@anonymous)#1 (0) { } Actual result: -------------- assertion failure/segfault ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=78937&edit=1