171010 15:22:42 [ERROR] mysqld got exception 0xc0000005 ;
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This could be because you hit a bug. It is also possible that this binary
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or one of the libraries it was linked against is corrupt, improperly built,
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or misconfigured. This error can also be caused by malfunctioning hardware.
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To report this bug, see http://kb.askmonty.org/en/reporting-bugs
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We will try our best to scrape up some info that will hopefully help
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diagnose the problem, but since we have already crashed,
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something is definitely wrong and this may fail.
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Server version: 5.5.58-MariaDB-debug
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key_buffer_size=1048576
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read_buffer_size=131072
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max_used_connections=7
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max_threads=501
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thread_count=6
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It is possible that mysqld could use up to
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key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 195826 K bytes of memory
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Hope that's ok; if not, decrease some variables in the equation.
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Thread pointer: 0x62507c7ce0
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Attempting backtrace. You can use the following information to find out
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where mysqld died. If you see no messages after this, something went
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terribly wrong...
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mysqld.exe!Field::is_real_null()[field.h:414]
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mysqld.exe!create_tmp_table()[sql_select.cc:15522]
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mysqld.exe!JOIN::exec()[sql_select.cc:2572]
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mysqld.exe!mysql_select()[sql_select.cc:3105]
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mysqld.exe!handle_select()[sql_select.cc:307]
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Inmysqld.exe!nexecute_sqlcom_select()o[sql_parse.cc:4685]D
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B: DEBUG: update_statistics for transforms/insert_select_1436.
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mysqld.exe!mysql_execute_command()[sql_parse.cc:2233]
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mysqld.exe!mysql_parse()[sql_parse.cc:5930]
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mysqld.exe!dispatch_command()[sql_parse.cc:1077]
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mysqld.exe!do_command()[sql_parse.cc:793]
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mysqld.exe!threadpool_process_request()[threadpool_common.cc:233]
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mysqld.exe!io_completion_callback()[threadpool_win.cc:568]
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KERNEL32.DLL!VirtualUnlock()
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ntdll.dll!RtlGetActiveActivationContext()
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ntdll.dll!RtlFreeUnicodeString()
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KERNEL32.DLL!BaseThreadInitThunk()
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ntdll.dll!RtlUserThreadStart()
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Trying to get some variables.
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Some pointers may be invalid and cause the dump to abort.
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Query (0x62507c56a8): SELECT DISTINCT GROUP_CONCAT( UUID_SHORT(), CURRENT_USER() ) AS field1, DEFAULT( `col_datetime_nokey` ) AS field2 FROM `c` GROUP BY `col_varchar_key` / -17676 ORDER BY BENCHMARK( 1, AVG( SIGN( ( RAND() ) ) ) ), @A := 'h' /* QNO 14276 CON_ID 11 */
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Connection ID (thread ID): 11
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Status: NOT_KILLED
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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=off
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master.err