Server version: 10.3.17-MariaDB-1:10.3.17+maria~bionic

key_buffer_size=134217728

read_buffer_size=2097152

max_used_connections=1

max_threads=102

thread_count=7

It is possible that mysqld could use up to 

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 760034 K  bytes of memory

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

Thread pointer: 0x7f1370000c08

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 = 0x7f13dc1d9dd8 thread_stack 0x49000

mysqld(my_print_stacktrace+0x2e)[0x5569b87e4e6e]

mysqld(handle_fatal_signal+0x515)[0x5569b827d885]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x12890)[0x7f13e2f0f890]

mysqld(Item_field::fix_fields(THD*, Item**)+0x219)[0x5569b82a1089]

mysqld(Item_direct_view_ref::fix_fields(THD*, Item**)+0x113)[0x5569b82a2003]

mysqld(Item_func::fix_fields(THD*, Item**)+0x147)[0x5569b82da067]

mysqld(Item_cond::fix_fields(THD*, Item**)+0x424)[0x5569b82b18b4]

mysqld(JOIN::optimize_inner()+0x705)[0x5569b80f1dc5]

mysqld(JOIN::optimize()+0x37)[0x5569b80f3fb7]

mysqld(mysql_derived_optimize(THD*, LEX*, TABLE_LIST*)+0xef)[0x5569b8067ebf]

mysqld(mysql_handle_single_derived(LEX*, TABLE_LIST*, unsigned int)+0xb1)[0x5569b8067771]

mysqld(JOIN::optimize_inner()+0x63e)[0x5569b80f1cfe]

mysqld(JOIN::optimize()+0x37)[0x5569b80f3fb7]

mysqld(mysql_select(THD*, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*)+0x856)[0x5569b80f5d86]

mysqld(handle_select(THD*, LEX*, select_result*, unsigned long)+0x14d)[0x5569b80f5f8d]

mysqld(mysql_execute_command(THD*)+0x7d57)[0x5569b80a5127]

mysqld(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool)+0x20a)[0x5569b80a56ba]

mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool)+0x1c57)[0x5569b80a8037]

mysqld(do_command(THD*)+0x178)[0x5569b80a8df8]

mysqld(do_handle_one_connection(CONNECT*)+0x33e)[0x5569b817b1de]

mysqld(handle_one_connection+0x3d)[0x5569b817b2ad]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x76db)[0x7f13e2f046db]

/lib/x86_64-linux-gnu/libc.so.6(clone+0x3f)[0x7f13e250688f]

Trying to get some variables.

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

Query (0x7f137000f5e0): insert into `table_d` (`name`, `uuid`, `c_id`) select distinct (     case         when (x2.x4 is null) then null         else (substring(x2.x4, 1, 100))     end),    case        when (x2.x16 is not null) then x2.x17        else null    end,    x2.x18 from (select x19.x23 as x18, x19.x32 as x33, x19.x81 as x4, x19.x90 as x16, x19.x139 as x17, x19.x140 as x141,           (case when (x216.`d_id` is null) then null else 1 end) as x217           from (               select x255.x258 as x23, x255.x264 as x32, x255.x267 as x37,                 x255.x293 as x81,                 x255.x298 as x90,                 x255.x323 as x139,                 (case when (x324.`d_id` is null) then null else 1 end) as x140             from (                 select                        x325.`c_id` as x258,                        x325.`a_id` as x264,                        x325.`uuid` as x267,                       x326.`name` as x293,                       (case when (x327.`uuid` is null) then null else 1 end) as x298,                       x327.`uuid` as x323                   from `table_c` x325                            inner join `table_a` x326 on x325.`a_id` = x326.`a_id`                            left outer join `table_b` x327 on x327.`uuid` = x326.`uuid`) x255                      left outer join `table_d` x324 on x324.`c_id` = x255.x258) x19                left outer join `table_d` x216 on (x19.x37 = x216.`uuid`) and false) x2          left outer join `table_d` x328 on (x2.x33 = x328.`a_id`) where (((x2.x141 is null) and (x2.x217 is null)) and (x328.`d_id` is null))

Connection ID (thread ID): 10

Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on

/git/10.3/sql/item.cc:6052: virtual bool Item_field::fix_fields(THD*, Item**): Assertion `context' failed.

190828 11:01:19 [ERROR] mysqld got signal 6 ;

linux/raise.c:54(__GI_raise)[0x7f2db8a73428]

stdlib/abort.c:91(__GI_abort)[0x7f2db8a7502a]

assert/assert.c:92(__assert_fail_base)[0x7f2db8a6bbd7]

/lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7f2db8a6bc82]

sql/item.cc:6060(Item_field::fix_fields(THD*, Item**))[0x55766ee0b705]

sql/item.h:824(Item::fix_fields_if_needed(THD*, Item**))[0x55766ee14241]

sql/item.cc:8973(Item_direct_view_ref::fix_fields(THD*, Item**))[0x55766e9e72b0]

sql/item.h:824(Item::fix_fields_if_needed(THD*, Item**))[0x55766ee618f1]

sql/item_func.cc:351(Item_func::fix_fields(THD*, Item**))[0x55766e9e72b0]

sql/item.h:824(Item::fix_fields_if_needed(THD*, Item**))[0x55766e9e72dd]

sql/item.h:827(Item::fix_fields_if_needed_for_scalar(THD*, Item**))[0x55766ea6118b]

sql/item.h:832(Item::fix_fields_if_needed_for_bool(THD*, Item**))[0x55766ee30bf4]

sql/item_cmpfunc.cc:4605(Item_cond::fix_fields(THD*, Item**))[0x55766eb253fd]

sql/sql_select.cc:1664(JOIN::optimize_inner())[0x55766eb24829]

sql/sql_select.cc:1453(JOIN::optimize())[0x55766ea974df]

sql/sql_derived.cc:907(mysql_derived_optimize(THD*, LEX*, TABLE_LIST*))[0x55766ea95b1e]

sql/sql_derived.cc:199(mysql_handle_single_derived(LEX*, TABLE_LIST*, unsigned int))[0x55766eb25789]

sql/sql_select.cc:1717(JOIN::optimize_inner())[0x55766eb24829]

sql/sql_select.cc:1453(JOIN::optimize())[0x55766eb2e424]

sql/sql_select.cc:4229(mysql_select(THD*, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x55766eb20400]

sql/sql_select.cc:386(handle_select(THD*, LEX*, select_result*, unsigned long))[0x55766eae3f56]

sql/sql_parse.cc:4566(mysql_execute_command(THD*))[0x55766eaee804]

sql/sql_parse.cc:7829(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x55766eadc348]

sql/sql_parse.cc:1858(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x55766eadad29]

sql/sql_parse.cc:1402(do_command(THD*))[0x55766ec45ca4]

sql/sql_connect.cc:1403(do_handle_one_connection(CONNECT*))[0x55766ec459e0]

sql/sql_connect.cc:1309(handle_one_connection)[0x55766f51e3ae]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7f2db96b06ba]

x86_64/clone.S:111(clone)[0x7f2db8b4541d]

Trying to get some variables.

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

Query (0x7f2d60012818): insert into `table_d` (`name`, `uuid`, `c_id`) select distinct ( case when (x2.x4 is null) then null else (substring(x2.x4, 1, 100)) end), case when (x2.x16 is not null) then x2.x17 else null end, x2.x18 from (select x19.x23 as x18, x19.x32 as x33, x19.x81 as x4, x19.x90 as x16, x19.x139 as x17, x19.x140 as x141, (case when (x216.`d_id` is null) then null else 1 end) as x217 from ( select x255.x258 as x23, x255.x264 as x32, x255.x267 as x37, x255.x293 as x81, x255.x298 as x90, x255.x323 as x139, (case when (x324.`d_id` is null) then null else 1 end) as x140 from ( select x325.`c_id` as x258, x325.`a_id` as x264, x325.`uuid` as x267, x326.`name` as x293, (case when (x327.`uuid` is null) then null else 1 end) as x298, x327.`uuid` as x323 from `table_c` x325 inner join `table_a` x326 on x325.`a_id` = x326.`a_id`                            left outer join `table_b` x327 on x327.`uuid` = x326.`uuid`) x255 left outer join `table_d` x324 on x324.`c_id` = x255.x258) x19 left outer join `table_d` x216 on (x19.x37 = x216.`uuid`) and false) x2 left outer join `table_d` x328 on (x2.x33 = x328.`a_id`) where (((x2.x141 is null) and (x2.x217 is null)) and (x328.`d_id` is null))