Bug #76080 [Com]: Segmentation fault running a simple script

Edit report at https://bugs.php.net/bug.php?id=76080&edit=1 ID: 76080 Comment by: ekin at coproductivity dot com Reported by: r dot dellaversana+php at gmail dot com Summary: Segmentation fault running a simple script Status: Open Type: Bug Package: Reproducible crash Operating System: Ubuntu 17.10 PHP Version: 7.2.3 Block user comment: N Private report: N New Comment: Can reproduce on fresh master. valgrind says: ==21607== start counting count: ==21607== Stack overflow in thread #1: can't grow stack to 0xffe801000 ==21607== ==21607== Process terminating with default action of signal 11 (SIGSEGV) ==21607== Access not within mapped region at address 0xFFE801FF8 ==21607== Stack overflow in thread #1: can't grow stack to 0xffe801000 ==21607== at 0xCC4E4E: zend_std_get_gc (zend_object_handlers.c:119) https://gist.github.com/ekinhbayar/d1c8a4c26b75d219f6703bdc41f3eaa9 Previous Comments: ------------------------------------------------------------------------ [2018-03-10 16:40:19] r dot dellaversana+php at gmail dot com Description: ------------ I have a segmentation fault in a very simple class. It builds a simple linked list and when I try to scan the list the php cli crashes. I tried with php 5.6.33 and php 7.2.3 both on Ubuntu 17.10. Simply run the script below and see the core dump happen! gdb says: Program terminated with signal SIGSEGV, Segmentation fault. #0 0x0000556cb4949594 in gc_mark_grey (ref=0x7fa2b2378c60) at /tmp/php-build/source/7.2.3/Zend/zend_gc.c:499 Test script: --------------- https://pastebin.com/8KeB6RSZ Expected result: ---------------- start counting count: 200000 Actual result: -------------- Segmentation fault gdb says: Program terminated with signal SIGSEGV, Segmentation fault. #0 0x0000556cb4949594 in gc_mark_grey (ref=0x7fa2b2378c60) at /tmp/php-build/source/7.2.3/Zend/zend_gc.c:499 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76080&edit=1