*** GDB info
#0 0x00007fa0cde0c771 in pthread_kill () from /lib64/libpthread.so.0
#1 0x0000000000ab7586 in my_write_core (sig=11) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/mysys/stacktrace.c:422
#2 0x000000000072f9ff in handle_fatal_signal (sig=11) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/signal_handler.cc:236
#3 <signal handler called>
#4 0x00007fa0cca58fde in _int_malloc () from /lib64/libc.so.6
#5 0x00007fa0cca5b12c in malloc () from /lib64/libc.so.6
#6 0x0000000000ab15ae in my_malloc (size=48, my_flags=16) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/mysys/my_malloc.c:38
#7 0x00000000008453be in String::realloc (this=0x7fa07874e388, alloc_length=40) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_string.cc:96
#8 0x0000000000845ea6 in String::append (this=0x7fa07874e388, s=0x7fa0780050a0 "SET @@global.query_cache_type = 'ON,OFF'", arg_length=40) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_string.cc:460
#9 0x000000000098d9b8 in random_name_to_avoid_gcc_bug_29365::Buffer::append (this=0x7fa07874e378, str=0x7fa0780050a0 "SET @@global.query_cache_type = 'ON,OFF'", length=40) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/opt_trace.cc:822
#10 0x000000000098cf09 in Opt_trace_stmt::set_query (this=0x7fa07874e300, query=0x7fa0780050a0 "SET @@global.query_cache_type = 'ON,OFF'", length=40, charset=0x17b4100 <my_charset_utf8_latvian_uca_ci>) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/opt_trace.cc:515
#11 0x000000000098e642 in Opt_trace_context::set_query (this=0x1d7d268, query=0x7fa0780050a0 "SET @@global.query_cache_type = 'ON,OFF'", length=40, charset=0x17b4100 <my_charset_utf8_latvian_uca_ci>) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/opt_trace.cc:1255
#12 0x000000000098f434 in Opt_trace_start::Opt_trace_start (this=0x7fa0b0237940, thd=0x1d7ad40, tbl=0x0, sql_command=SQLCOM_SET_OPTION, set_vars=0x1d7df48, query=0x7fa0780050a0 "SET @@global.query_cache_type = 'ON,OFF'", query_length=40, instr=0x0, query_charset=0x17b4100 <my_charset_utf8_latvian_uca_ci>) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/opt_trace2server.cc:217
#13 0x00000000007e2858 in mysql_execute_command (thd=0x1d7ad40) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_parse.cc:2798
#14 0x00000000007ed193 in mysql_parse (thd=0x1d7ad40, rawbuf=0x7fa0780050a0 "SET @@global.query_cache_type = 'ON,OFF'", length=40, parser_state=0x7fa0b0237e30) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_parse.cc:6773
#15 0x00000000007df5fc in dispatch_command (command=COM_QUERY, thd=0x1d7ad40, packet=0x2488c31 "SET @@global.query_cache_type = 'ON,OFF';", packet_length=41) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_parse.cc:1432
#16 0x00000000007de528 in do_command (thd=0x1d7ad40) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_parse.cc:1049
#17 0x00000000007a64e5 in do_handle_one_connection (thd_arg=0x1d7ad40) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_connect.cc:1532
#18 0x00000000007a5fed in handle_one_connection (arg=0x1d7ad40) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/sql/sql_connect.cc:1443
#19 0x0000000000dc5bac in pfs_spawn_thread (arg=0x2534770) at /mnt/workspace/percona-server-5.6-binaries-debug-yassl/label_exp/centos6-64/percona-server-5.6.21-69.0/storage/perfschema/pfs.cc:1860
#20 0x00007fa0cde07df3 in start_thread () from /lib64/libpthread.so.0
#21 0x00007fa0ccad101d in clone () from /lib64/libc.so.6
***** Crashing query
SET @@global.query_cache_type = 'ON,OFF'
Single threaded run, single mysqld involved