Server crashed on JSON_ARRAYAGG(DISTINCT ...) [strcoll.ic:255]

200807 14:36:00 [ERROR] mysqld got exception 0xc0000005 ;

This could be because you hit a bug. It is also possible that this binary

or one of the libraries it was linked against is corrupt, improperly built,

or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help

diagnose the problem, but since we have already crashed, 

something is definitely wrong and this may fail.

Server version: 10.5.4-MariaDB

key_buffer_size=134217728

read_buffer_size=67108864

max_used_connections=1

max_threads=65537

thread_count=2

It is possible that mysqld could use up to 

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 266322 K  bytes of memory

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

Thread pointer: 0xfe9e0a58f8

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...

server.dll!my_strnncollsp_utf8mb4_bin()[strcoll.ic:255]

server.dll!Field_blob::cmp_max()[field.cc:8512]

server.dll!group_concat_key_cmp_with_distinct_with_nulls()[item_sum.cc:3608]

server.dll!tree_insert()[tree.c:248]

server.dll!Item_func_group_concat::add()[item_sum.cc:4173]

server.dll!update_sum_func()[sql_select.cc:25642]

server.dll!end_send_group()[sql_select.cc:22009]

server.dll!evaluate_join_record()[sql_select.cc:20824]

server.dll!AGGR_OP::end_send()[sql_select.cc:28871]

server.dll!sub_select_postjoin_aggr()[sql_select.cc:20311]

server.dll!do_select()[sql_select.cc:20136]

server.dll!JOIN::exec_inner()[sql_select.cc:4444]

server.dll!JOIN::exec()[sql_select.cc:4226]

server.dll!mysql_select()[sql_select.cc:4651]

server.dll!handle_select()[sql_select.cc:417]

server.dll!execute_sqlcom_select()[sql_parse.cc:6209]

server.dll!mysql_execute_command()[sql_parse.cc:3939]

server.dll!mysql_parse()[sql_parse.cc:7997]

server.dll!dispatch_command()[sql_parse.cc:1877]

server.dll!do_command()[sql_parse.cc:1355]

server.dll!threadpool_process_request()[threadpool_common.cc:354]

server.dll!tp_callback()[threadpool_common.cc:194]

ntdll.dll!RtlFreeUnicodeString()

ntdll.dll!RtlFreeUnicodeString()

KERNEL32.DLL!BaseThreadInitThunk()

ntdll.dll!RtlUserThreadStart()

Trying to get some variables.

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

Query (0xfe9e0852e0): SELECT 

COUNT(DISTINCT flightRecordId),

JSON_ARRAYAGG(DISTINCT JSON_OBJECT('ocDeviceId', ocDeviceId, 'keys', JSON_EXTRACT(versionData,'$')))

FROM device JOIN flightrecord USING(deviceId)

JOIN othercomponent USING(flightRecordId)

JOIN ocversion USING(ocId)

WHERE calendarWeek > 202025 AND country LIKE 'DE%'

GROUP BY ocDeviceId

#GROUP BY JSON_KEYS(versionData)

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

The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains

information that should help you find out what is causing the crash.

Writing a core file at D:\MariaDB 10.5\data\