Description:
------------
PHP version: 7.0.9-r2
Configure line: './configure' '--prefix=/usr' '--build=x86_64-pc-linux-gnu' '--host=x86_64-pc-linux-gnu' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc' '--localstatedir=/var/lib' '--docdir=/usr/share/doc/php-7.0.9-r2' '--htmldir=/usr/share/doc/php-7.0.9-r2/html' '--prefix=/usr/lib64/php7.0' '--mandir=/usr/lib64/php7.0/man' '--infodir=/usr/lib64/php7.0/info' '--libdir=/usr/lib64/php7.0/lib' '--with-libdir=lib64' '--localstatedir=/var' '--without-pear' '--enable-maintainer-zts' '--disable-bcmath' '--with-bz2=/usr' '--disable-calendar' '--enable-ctype' '--without-curl' '--disable-dom' '--without-enchant' '--disable-exif' '--disable-fileinfo' '--disable-filter' '--disable-ftp' '--with-gettext=/usr' '--without-gmp' '--enable-hash' '--without-mhash' '--with-iconv' '--disable-intl' '--disable-ipv6' '--enable-json' '--without-kerberos' '--disable-libxml' '--without-libxml-dir' '--enable-mbstring' '--with-mcrypt=/usr' '--with-onig=/usr' '--with-openssl=/usr' '--with-openssl-dir=/usr' '--disable-pcntl' '--disable-phar' '--enable-pdo' '--disable-opcache' '--without-pgsql' '--enable-posix' '--without-pspell' '--without-recode' '--disable-simplexml' '--disable-shmop' '--without-snmp' '--disable-soap' '--disable-sockets' '--without-sqlite3' '--disable-sysvmsg' '--disable-sysvsem' '--disable-sysvshm' '--without-fpm-systemd' '--without-tidy' '--disable-tokenizer' '--disable-wddx' '--disable-xml' '--disable-xmlreader' '--disable-xmlwriter' '--without-xmlrpc' '--without-xsl' '--disable-zip' '--with-zlib=/usr' '--disable-debug' '--enable-dba' '--without-cdb' '--with-db4=/usr' '--disable-flatfile' '--without-gdbm' '--disable-inifile' '--without-qdbm' '--without-freetype-dir' '--disable-gd-jis-conv' '--without-jpeg-dir' '--without-png-dir' '--without-xpm-dir' '--without-gd' '--without-interbase' '--without-mysqli' '--with-mysql-sock=/var/run/mysqld/mysqld.sock' '--without-unixODBC' '--without-iodbc' '--without-oci8' '--without-pdo-dblib' '--with-pdo-mysql=mysqlnd' '--without-pdo-pgsql' '--without-pdo-sqlite' '--without-pdo-firebird' '--without-pdo-odbc' '--without-pdo-oci' '--with-readline=/usr' '--without-libedit' '--without-mm' '--with-pic' '--with-pcre-regex=/usr' '--with-pcre-dir=/usr' '--with-config-file-path=/etc/php/apache2-php7.0' '--with-config-file-scan-dir=/etc/php/apache2-php7.0/ext-active' '--disable-embed' '--disable-cli' '--disable-cgi' '--disable-fpm' '--with-apxs2=/usr/bin/apxs' '--disable-phpdbg' 'build_alias=x86_64-pc-linux-gnu' 'host_alias=x86_64-pc-linux-gnu' 'CPPFLAGS='

Basically, the `declare(ticks=1);` line and `register_tick_function` line together cause PHP to throw a segmentation fault. Having just one line or the other works as expected. The function passed to register_ticks_function() doesn't seem to make any difference. I'm almost entirely sure PHP is throwing a seg fault because the Apache error logs say "AH00052: child pid YYYYY exit signal Segmentation fault (11)

Test script:
---------------
<?php

declare(ticks=1);
$ticks = 0;
register_tick_function(
	function() use (&$ticks){
		$ticks++;
	}
);

var_dump($ticks);

Expected result:
----------------
The result above should dump 0 or an int counting the number of ticks it takes ti run the code.

Actual result:
--------------
The actual result is that the web browser claims the page was reset and nothing is ever loaded.