#0  __memcpy_avx_unaligned ()
    at ../sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S:273
#1  0x00005555556798d8 in memcpy (__len=18446744073709551614,
    __src=0x7fffed43e1fc, __dest=0x7fffed49e390)
    at /usr/include/x86_64-linux-gnu/bits/string3.h:53
#2  zend_string_init (persistent=0, len=18446744073709551614,
    str=0x7fffed43e1fc "\303\237\343\201\224a")
    at /build/php7.0-Y7XHJx/php7.0-7.0.3/Zend/zend_string.h:159
#3  php_pcre_split_impl (pce=pce@entry=0x555555d4aea0,
    subject=0x7fffed43e1f8 "\303\251\303\204\303\237\343\201\224a",
    subject_len=10, return_value=return_value@entry=0x7ffff381b240,
    limit_val=-1, flags=<optimized out>)
    at /build/php7.0-Y7XHJx/php7.0-7.0.3/ext/pcre/php_pcre.c:1808
#4  0x000055555567a1eb in zif_preg_split (execute_data=<optimized out>,
    return_value=0x7ffff381b240)
    at /build/php7.0-Y7XHJx/php7.0-7.0.3/ext/pcre/php_pcre.c:1721