SELECT * FROM ( SELECT 1 AS t , 4 AS x ) ss GROUP BY x , x HAVING x = ( SELECT ( ( SELECT EXISTS ( SELECT 1 ) ) NOT IN ( SELECT 1 UNION SELECT 1 ) ) ) ORDER BY x ; 

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mariadbd(_ZN21Item_exists_subselect7val_intEv+0x23)[0x55822a0744a3]

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mariadbd(_ZN10Item_equal9add_constEP3THDP4Item+0x56)[0x558229fe3a66]

mariadbd(_ZN10Item_equal16merge_with_checkEP3THDPS_b+0xc5)[0x558229fe3d85]

mariadbd(_Z24propagate_new_equalitiesP3THDP4ItemP4ListI10Item_equalEP10COND_EQUALPb+0xe0)[0x558229d783e0]

mariadbd(_Z36and_new_conditions_to_optimized_condP3THDP4ItemPP10COND_EQUALR4ListIS1_EPNS1_11cond_resultE+0x462)[0x558229e9c602]

mariadbd(_ZN4JOIN14optimize_innerEv+0x152b)[0x558229da29eb]

mariadbd(_ZN4JOIN8optimizeEv+0xda)[0x558229da2e2a]

mariadbd(_Z12mysql_selectP3THDP10TABLE_LISTR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0xd1)[0x558229da2f21]

mariadbd(_Z13handle_selectP3THDP3LEXP13select_resulty+0x154)[0x558229da3774]

mariadbd(+0x826f55)[0x558229d16f55]

mariadbd(_Z21mysql_execute_commandP3THDb+0x419e)[0x558229d25f0e]

mariadbd(_Z11mysql_parseP3THDPcjP12Parser_state+0x1e7)[0x558229d27237]

mariadbd(_Z16dispatch_command19enum_server_commandP3THDPcjb+0x14bd)[0x558229d29a1d]

mariadbd(_Z10do_commandP3THDb+0x138)[0x558229d2b818]

mariadbd(_Z24do_handle_one_connectionP7CONNECTb+0x3bf)[0x558229e533af]

mariadbd(handle_one_connection+0x5d)[0x558229e536fd]

mariadbd(+0xcd1906)[0x55822a1c1906]

/lib/x86_64-linux-gnu/libc.so.6(+0x94b43)[0x7f2ed5091b43]

/lib/x86_64-linux-gnu/libc.so.6(clone+0x44)[0x7f2ed5122bb4]

Trying to get some variables.

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

Query (0x7f2e7c0130d8): SELECT * FROM ( SELECT 1 AS t , 4 AS x ) ss GROUP BY x , x HAVING x = ( SELECT ( ( SELECT EXISTS ( SELECT 1 ) ) NOT IN ( SELECT 1 UNION SELECT 1 ) ) ) ORDER BY x

Connection ID (thread ID): 4

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=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off,hash_join_cardinality=on