Description:
------------
I am getting the following segfaults in syslog:
when I start load phalcon extension with opcache，and it will be aborted (core dump) .But it will be work fined without opcache.

centos 6.10
kernel version 2.6.32-042stab123.9

```
[root@gdb-debug coredump]# /usr/local/php-7.2.13/bin/php -m
[PHP Modules]
bcmath
calendar
Core
ctype
curl
date
dom
fileinfo
filter
gd
hash
iconv
json
ldap
libxml
mbstring
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
pdo_sqlite
phalcon
phpdbg_webhelper
posix
Reflection
session
SimpleXML
soap
sockets
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
Zend OPcache
zip
zlib

[Zend Modules]
Zend OPcache

php: /root/php-7.2.13/ext/opcache/ZendAccelerator.c:637: accel_replace_string_by_process_permanent: Assertion `0' failed.
Aborted (core dumped)
```

gdb backtrace:

```
(gdb) source /root/php-7.2.13/.gdbinit 
(gdb) zbacktrace
(gdb) bt
#0  0x00007fbd932c34f5 in raise () from /lib64/libc.so.6
#1  0x00007fbd932c4cd5 in abort () from /lib64/libc.so.6
#2  0x00007fbd932bc66e in __assert_fail_base () from /lib64/libc.so.6
#3  0x00007fbd932bc730 in __assert_fail () from /lib64/libc.so.6
#4  0x00007fbd90151bcd in accel_replace_string_by_process_permanent (str=0x7fbd882dc650) at /root/php-7.2.13/ext/opcache/ZendAccelerator.c:637
#5  0x00007fbd90151896 in accel_copy_permanent_strings (new_interned_string=0x7fbd90151b79 <accel_replace_string_by_process_permanent>) at /root/php-7.2.13/ext/opcache/ZendAccelerator.c:580
#6  0x00007fbd90151cb2 in accel_use_permanent_interned_strings () at /root/php-7.2.13/ext/opcache/ZendAccelerator.c:665
#7  0x00007fbd90157400 in accel_shutdown () at /root/php-7.2.13/ext/opcache/ZendAccelerator.c:2797
#8  0x00007fbd90159b4d in zm_shutdown_zend_accelerator (type=1, module_number=42) at /root/php-7.2.13/ext/opcache/zend_accelerator_module.c:434
#9  0x0000000000aaca9d in module_destructor (module=0x360e7f0) at /root/php-7.2.13/Zend/zend_API.c:2564
#10 0x0000000000aa0845 in module_destructor_zval (zv=0x7ffd6cf77150) at /root/php-7.2.13/Zend/zend.c:690
#11 0x0000000000ab70e0 in _zend_hash_del_el_ex (ht=0x1725780, idx=41, p=0x32a68f0, prev=0x0) at /root/php-7.2.13/Zend/zend_hash.c:998
#12 0x0000000000ab71ae in _zend_hash_del_el (ht=0x1725780, idx=41, p=0x32a68f0) at /root/php-7.2.13/Zend/zend_hash.c:1021
#13 0x0000000000ab8733 in zend_hash_graceful_reverse_destroy (ht=0x1725780) at /root/php-7.2.13/Zend/zend_hash.c:1477
#14 0x0000000000aaa784 in zend_destroy_modules () at /root/php-7.2.13/Zend/zend_API.c:2008
#15 0x0000000000aa0d4c in zend_shutdown () at /root/php-7.2.13/Zend/zend.c:905
#16 0x0000000000a0b111 in php_module_shutdown () at /root/php-7.2.13/main/main.c:2453
#17 0x0000000000b9e772 in main (argc=2, argv=0x329ee70) at /root/php-7.2.13/sapi/cli/php_cli.c:1418
```