Bug #77434 [Com]: php-fpm workers are segfaulting in zend_gc_addref

Edit report at https://bugs.php.net/bug.php?id=77434&edit=1 ID: 77434 Comment by: bugs dot php dot net at mundpropaganda dot net Reported by: bugs dot php dot net at mundpropaganda dot net Summary: php-fpm workers are segfaulting in zend_gc_addref Status: Open Type: Bug Package: opcache Operating System: Archlinux PHP Version: 7.3Git-2019-01-09 (Git) Block user comment: N Private report: N New Comment: I meant the problem goes away when I set "opcache.optimization_level=0" (checked twice , sorry again) Previous Comments: ------------------------------------------------------------------------ [2019-01-09 14:48:37] bugs dot php dot net at mundpropaganda dot net Oh, I'm sorry… The problem indeed goes away after I set "opcache.protect_memory=1". I hadn't reloaded php-fpm correctly before. The backtrace I get with opcache.protect_memory=1 follows: #0 0x00007f7ddb598d7f in raise () from /usr/lib/libc.so.6 #1 0x00007f7ddb583672 in abort () from /usr/lib/libc.so.6 #2 0x00007f7ddb583548 in __assert_fail_base.cold.0 () from /usr/lib/libc.so.6 #3 0x00007f7ddb591396 in __assert_fail () from /usr/lib/libc.so.6 #4 0x000055a2619614f0 in rc_dtor_func (p=0x7f7ddad66d80) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.c:64 #5 0x000055a261977277 in i_zval_ptr_dtor (zval_ptr=0x7f7dd20e0060, __zend_filename=0x55a2621cc210 "/home/krist/tmp/php-7.3.2/Zend/zend_hash.c", __zend_lineno=1491) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.h:44 #6 0x000055a26197c072 in zend_array_destroy (ht=0x7f7dd213b480) at /home/krist/tmp/php-7.3.2/Zend/zend_hash.c:1491 #7 0x000055a261961694 in zend_array_destroy_wrapper (arr=0x7f7dd213b480) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.c:90 #8 0x000055a26196151f in rc_dtor_func (p=0x7f7dd213b480) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.c:65 #9 0x000055a261977277 in i_zval_ptr_dtor (zval_ptr=0x7f7ddad6c788, __zend_filename=0x55a2621cc210 "/home/krist/tmp/php-7.3.2/Zend/zend_hash.c", __zend_lineno=1487) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.h:44 #10 0x000055a26197c034 in zend_array_destroy (ht=0x7f7dd213b5a0) at /home/krist/tmp/php-7.3.2/Zend/zend_hash.c:1487 #11 0x000055a261961694 in zend_array_destroy_wrapper (arr=0x7f7dd213b5a0) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.c:90 #12 0x000055a26196151f in rc_dtor_func (p=0x7f7dd213b5a0) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.c:65 #13 0x000055a261977277 in i_zval_ptr_dtor (zval_ptr=0x7f7dd213a620, __zend_filename=0x55a2621cc210 "/home/krist/tmp/php-7.3.2/Zend/zend_hash.c", __zend_lineno=1487) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.h:44 #14 0x000055a26197c034 in zend_array_destroy (ht=0x7f7dd213b540) at /home/krist/tmp/php-7.3.2/Zend/zend_hash.c:1487 #15 0x000055a261961694 in zend_array_destroy_wrapper (arr=0x7f7dd213b540) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.c:90 #16 0x000055a26196151f in rc_dtor_func (p=0x7f7dd213b540) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.c:65 #17 0x000055a261977277 in i_zval_ptr_dtor (zval_ptr=0x7f7dd2131408, __zend_filename=0x55a2621cc210 "/home/krist/tmp/php-7.3.2/Zend/zend_hash.c", __zend_lineno=1487) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.h:44 #18 0x000055a26197c034 in zend_array_destroy (ht=0x7f7dd213b4e0) at /home/krist/tmp/php-7.3.2/Zend/zend_hash.c:1487 #19 0x000055a261961694 in zend_array_destroy_wrapper (arr=0x7f7dd213b4e0) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.c:90 #20 0x000055a26196151f in rc_dtor_func (p=0x7f7dd213b4e0) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.c:65 #21 0x000055a2619b28e1 in i_zval_ptr_dtor (zval_ptr=0x7f7dd2136238, __zend_filename=0x55a2621d13c0 "/home/krist/tmp/php-7.3.2/Zend/zend_objects.c", __zend_lineno=55) at /home/krist/tmp/php-7.3.2/Zend/zend_variables.h:44 #22 0x000055a2619b2bbe in zend_object_std_dtor (object=0x7f7dd21361c0) at /home/krist/tmp/php-7.3.2/Zend/zend_objects.c:55 #23 0x000055a2619b9b0d in zend_objects_store_free_object_storage (objects=0x55a26237e568 <executor_globals+840>, fast_shutdown=0 '\000') at /home/krist/tmp/php-7.3.2/Zend/zend_objects_API.c:118 #24 0x000055a26194ba71 in shutdown_executor () at /home/krist/tmp/php-7.3.2/Zend/zend_execute_API.c:268 #25 0x000055a261963f7d in zend_deactivate () at /home/krist/tmp/php-7.3.2/Zend/zend.c:1104 #26 0x000055a2618ca496 in php_request_shutdown (dummy=0x0) at /home/krist/tmp/php-7.3.2/main/main.c:1926 #27 0x000055a261a52f3b in main (argc=3, argv=0x7ffdbd24e6e8) ------------------------------------------------------------------------ [2019-01-09 14:35:06] nikic@php.net In that case, does setting opcache.protect_memory=1 produce a different backtrace? ------------------------------------------------------------------------ [2019-01-09 14:31:52] bugs dot php dot net at mundpropaganda dot net Unfortunately it doesn't. It's exactly the same with opcache.optimization_level=0 ------------------------------------------------------------------------ [2019-01-09 14:26:03] nikic@php.net Does the problem go away if you set opcache.optimization_level=0? ------------------------------------------------------------------------ [2019-01-09 14:21:22] bugs dot php dot net at mundpropaganda dot net Forgot to mention: When I disable opcache, the problem goes away. Also by downgrading back to PHP 7.2 (with opcache enabled) ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=77434 -- Edit this bug report at https://bugs.php.net/bug.php?id=77434&edit=1