Thread pointer: 0x7f9550000b10
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 = 7f9583175e28 thread_stack 0x40000
/usr/local/mysql57/bin/mysqld(my_print_stacktrace+0x35)[0xf25c45]
/usr/local/mysql57/bin/mysqld(handle_fatal_signal+0x4a4)[0x7b8604]
/lib64/libpthread.so.0[0x37f160f7e0]
/usr/local/mysql57/bin/mysqld(_ZN16Multisource_info9delete_miEPKc+0x2df)[0xf082ff]
/usr/local/mysql57/bin/mysqld(_Z11reset_slaveP3THDP11Master_infob+0x1c5)[0xef1e05]
/usr/local/mysql57/bin/mysqld(_Z11reset_slaveP3THD+0x2e2)[0xef21b2]
/usr/local/mysql57/bin/mysqld(_Z15reset_slave_cmdP3THD+0x98)[0xef2388]
/usr/local/mysql57/bin/mysqld(_Z20reload_acl_and_cacheP3THDmP10TABLE_LISTPi+0x30c)[0xd2ae3c]
/usr/local/mysql57/bin/mysqld(_Z21mysql_execute_commandP3THDb+0x83a)[0xcfaf2a]
/usr/local/mysql57/bin/mysqld(_Z11mysql_parseP3THDP12Parser_state+0x3cd)[0xcff97d]
/usr/local/mysql57/bin/mysqld(_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command+0x1099)[0xd00a79]
/usr/local/mysql57/bin/mysqld(_Z10do_commandP3THD+0x194)[0xd016e4]
/usr/local/mysql57/bin/mysqld(handle_connection+0x2a4)[0xdce6e4]
/usr/local/mysql57/bin/mysqld(pfs_spawn_thread+0x171)[0x121b951]
/lib64/libpthread.so.0[0x37f1607aa1]
/lib64/libc.so.6(clone+0x6d)[0x37f0ee893d]