Bug #66748 [Opn->Fbk]: GC causes Segmentation Fault

Edit report at https://bugs.php.net/bug.php?id=66748&edit=1 ID: 66748 Updated by: laruence@php.net Reported by: znakomstvaastrasoft at gmail dot com Summary: GC causes Segmentation Fault -Status: Open +Status: Feedback Type: Bug Package: Reproducible crash Operating System: CentOS 6 PHP Version: 5.4.25 Block user comment: N Private report: N New Comment: Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. Previous Comments: ------------------------------------------------------------------------ [2014-02-20 15:06:37] znakomstvaastrasoft at gmail dot com Description: ------------ I'm running a CLI script causing a segfault. Debugging with GDB gives me this: (gdb) bt #0 zval_scan (pz=0x0) at /usr/src/debug/php-5.4.25/Zend/zend_gc.c:516 #1 0x0000000000601b8d in zval_scan (pz=<value optimized out>) at /usr/src/debug/php-5.4.25/Zend/zend_gc.c:568 #2 0x0000000000601b8d in zval_scan (pz=<value optimized out>) at /usr/src/debug/php-5.4.25/Zend/zend_gc.c:568 #3 0x0000000000601b8d in zval_scan (pz=<value optimized out>) at /usr/src/debug/php-5.4.25/Zend/zend_gc.c:568 #4 0x0000000000602431 in zobj_scan () at /usr/src/debug/php-5.4.25/Zend/zend_gc.c:605 #5 gc_scan_roots () at /usr/src/debug/php-5.4.25/Zend/zend_gc.c:625 #6 gc_collect_cycles () at /usr/src/debug/php-5.4.25/Zend/zend_gc.c:796 #7 0x00000000006028d4 in gc_zval_possible_root (zv=<value optimized out>) at /usr/src/debug/php-5.4.25/Zend/zend_gc.c:166 #8 0x0000000000669011 in gc_zval_check_possible_root (execute_data=0x7f1e1e4ab340) at /usr/src/debug/php-5.4.25/Zend/zend_gc.h:183 #9 zend_pzval_unlock_func (execute_data=0x7f1e1e4ab340) at /usr/src/debug/php-5.4.25/Zend/zend_execute.c:81 #10 _get_zval_ptr_var (execute_data=0x7f1e1e4ab340) at /usr/src/debug/php-5.4.25/Zend/zend_execute.c:184 #11 ZEND_ASSIGN_SPEC_CV_VAR_HANDLER (execute_data=0x7f1e1e4ab340) at /usr/src/debug/php-5.4.25/Zend/zend_vm_execute.h:33137 #12 0x000000000064bf88 in execute (op_array=0x1a11720) at /usr/src/debug/php-5.4.25/Zend/zend_vm_execute.h:410 #13 0x00000000005e1e40 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/src/debug/php-5.4.25/Zend/zend.c:1315 #14 0x0000000000584b68 in php_execute_script (primary_file=0x7fff7ad27070) at /usr/src/debug/php-5.4.25/main/main.c:2502 #15 0x000000000068d903 in do_cli (argc=6, argv=0x7fff7ad283c8) at /usr/src/debug/php-5.4.25/sapi/cli/php_cli.c:989 #16 0x000000000068e0c8 in main (argc=6, argv=0x7fff7ad283c8) at /usr/src/debug/php-5.4.25/sapi/cli/php_cli.c:1365 Digging deeper, GC tries to check zval, which is 0-pointer and fails. I can send a core dump by request. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=66748&edit=1