Same crash reproduced on PS 5.7.14 and PS 5.7.15:

2016-10-27 07:18:21 0x7fb1fa7f9700  InnoDB: Assertion failure in thread 140402388604672 in file fts0que.cc line 3831
InnoDB: Failing assertion: !query->intersection
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
11:18:21 UTC - mysqld got signal 6 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
Attempting to collect some information that could help diagnose the problem.
As this is a crash and something is definitely wrong, the information
collection process might fail.
Please help us make Percona Server better by reporting any
bugs at http://bugs.percona.com/

key_buffer_size=8388608
read_buffer_size=131072
max_used_connections=1
max_threads=152
thread_count=1
connection_count=1
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 68309 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7fb1cf816000
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 7fb1fa7f8df0 thread_stack 0x40000
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(my_print_stacktrace+0x2e)[0xfee3be]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(handle_fatal_signal+0x4a1)[0x943d51]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7fb1fa24a330]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x37)[0x7fb1f83e5c37]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x148)[0x7fb1f83e9028]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld[0x91458b]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_Z9fts_queryP5trx_tP12dict_index_tjPKhmPP12fts_result_ty+0x2371)[0x1320981]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_ZN11ha_innobase11ft_init_extEjjP6String+0x379)[0x1095929]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_ZN15Item_func_match11init_searchEP3THD+0x157)[0xa0a6c7]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_Z12init_ftfuncsP3THDP13st_select_lex+0x4c)[0xda86fc]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_ZN4JOIN8optimizeEv+0x23cc)[0xdf0c1c]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_ZN13st_select_lex8optimizeEP3THD+0x4a)[0xe2c92a]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_Z12handle_queryP3THDP3LEXP12Query_resultyy+0x165)[0xe2caf5]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld[0x90aeba]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_Z21mysql_execute_commandP3THDb+0x31a4)[0xdf7524]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_Z11mysql_parseP3THDP12Parser_state+0x5d5)[0xdf9c75]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command+0x1211)[0xdfaef1]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(_Z10do_commandP3THD+0x1cd)[0xdfb65d]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(handle_connection+0x2a4)[0xeb2124]
/home/przemyslaw.malkowski/sandboxes/tarballs/percona5.7.15/bin/mysqld(pfs_spawn_thread+0x1b4)[0x101bb04]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x8184)[0x7fb1fa242184]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fb1f84a937d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (7fb1cf828030): select content_id,page from text_content where MATCH (text_content.text_content) AGAINST ('+databases +language +compliance +limitations ' IN BOOLEAN MODE) limit 300
Connection ID (thread ID): 2