[draft]

180424 19:16:28 [ERROR] mysqld got signal 6 ;

Server version: 10.3.7-MariaDB-debug-log

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=27

max_threads=153

thread_count=35

It is possible that mysqld could use up to 

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467545 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7fda20000a98

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 = 0x7fda9f7b3ec0 thread_stack 0x49000

/home/alice/git/10.3/sql/mysqld(my_print_stacktrace+0x40)[0x5599243c3829]

/home/alice/git/10.3/sql/mysqld(handle_fatal_signal+0x3e1)[0x559923bb1a6e]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fdaed8a6390]

linux/raise.c:54(__GI_raise)[0x7fdaecc5f428]

stdlib/abort.c:91(__GI_abort)[0x7fdaecc6102a]

posix/libc_fatal.c:175(__fsetlocking)[0x7fdaecca17ea]

malloc/malloc.c:5006(malloc_printerr)[0x7fdaeccae698]

sql/mdl.h:583(MDL_ticket::~MDL_ticket())[0x559923a33644]

sql/mdl.cc:966(MDL_ticket::destroy(MDL_ticket*))[0x559923a2e5e6]

sql/mdl.cc:2635(MDL_context::release_lock(enum_mdl_duration, MDL_ticket*))[0x559923a3143a]

sql/mdl.cc:2677(MDL_context::release_locks_stored_before(enum_mdl_duration, MDL_ticket*))[0x559923a315dd]

sql/mdl.cc:2850(MDL_context::release_transactional_locks())[0x559923a31a88]

sql/sql_parse.cc:6414(mysql_execute_command(THD*))[0x5599238cca34]

sql/sp_head.cc:3600(sp_instr_stmt::exec_core(THD*, unsigned int*))[0x5599237f0df6]

sql/sp_head.cc:3316(sp_lex_keeper::reset_lex_and_exec_core(THD*, unsigned int*, bool, sp_instr*))[0x5599237f020c]

sql/sp_head.cc:3503(sp_instr_stmt::execute(THD*, unsigned int*))[0x5599237f09ad]

sql/sp_head.cc:1354(sp_head::execute(THD*, bool))[0x5599237ea76b]

sql/sp_head.cc:2292(sp_head::execute_procedure(THD*, List<Item>*))[0x5599237ed10c]

sql/sql_parse.cc:2944(do_execute_sp(THD*, sp_head*))[0x5599238c126b]

sql/sql_parse.cc:3186(Sql_cmd_call::execute(THD*))[0x5599238c1e34]

sql/sql_parse.cc:6282(mysql_execute_command(THD*))[0x5599238cc1e8]

sql/sql_parse.cc:8001(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x5599238d0f25]

sql/sql_parse.cc:1848(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x5599238be2fd]

sql/sql_parse.cc:1391(do_command(THD*))[0x5599238bcd35]

sql/sql_connect.cc:1402(do_handle_one_connection(CONNECT*))[0x559923a24d4d]

sql/sql_connect.cc:1309(handle_one_connection)[0x559923a24acd]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7fdaed89c6ba]

x86_64/clone.S:111(clone)[0x7fdaecd3141d]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x7fda2008b4f0): SELECT CONCAT( table2.`col_varchar_nokey`, table1.`col_varchar_nokey` ) AS field1 FROM ( CC AS table1 STRAIGHT_JOIN ( ( BB AS table2 INNER JOIN C AS table3 ON (table3.`pk` <> table2.`pk` ) ) ) ON (( table3.`pk` >= table2.`col_int_nokey` ) AND (table3.`pk` < table2.`pk` ) ) ) ORDER BY field1, field1 DESC, field1, field1  /* QNO 185 CON_ID 36 */  /* QNO 252 CON_ID 36 */

Connection ID (thread ID): 36

Status: NOT_KILLED