Bug #78937 [NEW]: Preloading unlinkable anonymous class can segfault

From: cmb Operating system: * PHP version: 7.4Git-2019-12-09 (Git) Package: opcache Bug Type: Bug Bug description:Preloading unlinkable anonymous class can segfault 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 bug report at https://bugs.php.net/bug.php?id=78937&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=78937&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=78937&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=78937&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=78937&r=needscript Try newer version: https://bugs.php.net/fix.php?id=78937&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=78937&r=support Expected behavior: https://bugs.php.net/fix.php?id=78937&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=78937&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=78937&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=78937&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=78937&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=78937&r=dst IIS Stability: https://bugs.php.net/fix.php?id=78937&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=78937&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=78937&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=78937&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=78937&r=mysqlcfg