Comment 2 for bug 1696942

Today 24.06.2017, we hit it again. MySQL crashed with the same bug:

2017-06-23T11:31:26.156921Z 2541990 [Note] Aborted connection 2541990 to db: 'xxxxx' user: 'xxxx' host: '192.168.xx.xx' (Got timeout reading communication packets)

*** Error in `/usr/sbin/mysqld': double free or corruption (!prev): 0x00007fb1a0007880 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x7d053)[0x7fb3a34eb053]
/usr/sbin/mysqld(_Z15row_search_mvccPh15page_cur_mode_tP14row_prebuilt_tmm+0xaa4)[0x11098c4]
/usr/sbin/mysqld(_ZN11ha_innobase10index_readEPhPKhj16ha_rkey_function+0x316)[0xff4326]
/usr/sbin/mysqld(_ZN7handler17ha_index_read_mapEPhPKhm16ha_rkey_function+0x248)[0x80bc58]
/usr/sbin/mysqld(_ZN7handler16read_range_firstEPK12st_key_rangeS2_bb+0x5c)[0x80c40c]
/usr/sbin/mysqld(_ZN7handler21multi_range_read_nextEPPc+0x99)[0x7ff059]
/usr/sbin/mysqld(_ZN18QUICK_RANGE_SELECT8get_nextEv+0x5a)[0xe0605a]
/usr/sbin/mysqld[0xc3747a]
/usr/sbin/mysqld(_Z10sub_selectP4JOINP7QEP_TABb+0x11b)[0xca8d8b]
/usr/sbin/mysqld(_ZN4JOIN4execEv+0x267)[0xca1967]
/usr/sbin/mysqld(_Z12handle_queryP3THDP3LEXP12Query_resultyy+0x17d)[0xd13f5d]
/usr/sbin/mysqld[0x75f7c1]
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THDb+0x482e)[0xcd518e]
/usr/sbin/mysqld(_Z11mysql_parseP3THDP12Parser_state+0x60d)[0xcd84dd]
/usr/sbin/mysqld(_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command+0xaba)[0xcd902a]
/usr/sbin/mysqld(_Z10do_commandP3THD+0x1df)[0xcdaabf]
/usr/sbin/mysqld(handle_connection+0x2b8)[0xda2f28]
/usr/sbin/mysqld(pfs_spawn_thread+0x1b4)[0xf22a94]
/lib64/libpthread.so.0(+0x7dc5)[0x7fb3a5311dc5]
/lib64/libc.so.6(clone+0x6d)[0x7fb3a3564c4d]
======= Memory map: ========