2021-03-24  0:25:32 0 [Note] InnoDB: Uses event mutexes
2021-03-24  0:25:32 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2021-03-24  0:25:32 0 [Note] InnoDB: Number of pools: 1
2021-03-24  0:25:32 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions
2021-03-24  0:25:32 0 [Note] mariadbd: O_TMPFILE is not supported on /tmp (disabling future attempts)
2021-03-24  0:25:32 0 [Note] InnoDB: Using Linux native AIO
2021-03-24  0:25:32 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728
2021-03-24  0:25:32 0 [Note] InnoDB: Completed initialization of buffer pool
2021-03-24  0:25:32 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2021-03-24  0:25:32 0 [Note] InnoDB: 128 rollback segments are active.
2021-03-24  0:25:32 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2021-03-24  0:25:32 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2021-03-24  0:25:32 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2021-03-24  0:25:32 0 [Note] InnoDB: 10.5.9 started; log sequence number 75840139118; transaction id 14134545
2021-03-24  0:25:32 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
2021-03-24  0:25:32 0 [Note] Plugin 'FEEDBACK' is disabled.
2021-03-24  0:25:32 0 [Note] Server socket created on IP: '0.0.0.0'.
2021-03-24  0:25:32 0 [Note] Reading of all Master_info entries succeeded
2021-03-24  0:25:32 0 [Note] Added new Master_info '' to hash table
2021-03-24  0:25:32 0 [Note] /usr/sbin/mariadbd: ready for connections.
Version: '10.5.9-MariaDB-1:10.5.9+maria~focal'  socket: '/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution
2021-03-24  0:25:32 0 [Note] InnoDB: Buffer pool(s) load completed at 210324  0:25:32
210324  0:32:12 [ERROR] mysqld got signal 11 ;
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: 10.5.9-MariaDB-1:10.5.9+maria~focal
key_buffer_size=134217728
read_buffer_size=131072
max_used_connections=5
max_threads=153
thread_count=5
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467864 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7fa0e0000c58
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 = 0x7fa128667d58 thread_stack 0x49000
??:0(my_print_stacktrace)[0x562c029caaf2]
??:0(handle_fatal_signal)[0x562c024206f5]
??:0(__restore_rt)[0x7fa12c3733c0]
??:0(Type_handler_newdecimal::calc_pack_length(unsigned int) const)[0x562c020b3cae]
??:0(SEL_ARG::tree_delete(SEL_ARG*))[0x562c02567333]
??:0(SEL_ARG::tree_delete(SEL_ARG*))[0x562c02567c7f]
??:0(SEL_IMERGE::and_sel_tree(RANGE_OPT_PARAM*, SEL_TREE*, SEL_IMERGE*))[0x562c02568141]
??:0(SEL_IMERGE::and_sel_tree(RANGE_OPT_PARAM*, SEL_TREE*, SEL_IMERGE*))[0x562c025682a4]
??:0(SEL_IMERGE::and_sel_tree(RANGE_OPT_PARAM*, SEL_TREE*, SEL_IMERGE*))[0x562c0256849d]
??:0(Item_cond_and::get_mm_tree(RANGE_OPT_PARAM*, Item**))[0x562c025688e2]
??:0(SQL_SELECT::test_quick_select(THD*, Bitmap<64u>, unsigned long long, unsigned long long, bool, bool, bool, bool))[0x562c0256f266]
??:0(JOIN::optimize_inner())[0x562c0227a043]
??:0(JOIN::optimize())[0x562c0227ab73]
??:0(mysql_select(THD*, TABLE_LIST*, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x562c0227ac37]
??:0(handle_select(THD*, LEX*, select_result*, unsigned long))[0x562c0227b657]
??:0(LEX::mark_first_table_as_inserting())[0x562c02209f11]
??:0(mysql_execute_command(THD*))[0x562c022181a7]
??:0(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x562c02204a9f]
??:0(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x562c0221065f]
??:0(do_command(THD*))[0x562c02212a37]
??:0(do_handle_one_connection(CONNECT*, bool))[0x562c02318341]
??:0(handle_one_connection)[0x562c023187bd]
??:0(MyCTX_nopad::finish(unsigned char*, unsigned int*))[0x562c02676c66]
??:0(start_thread)[0x7fa12c367609]
??:0(clone)[0x7fa12bf56293]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7fa0e0010670): SELECT forums_posts.*, forums_topics.* FROM `forum_forums_posts` AS `forums_posts`  STRAIGHT_JOIN `forum_forums_topics` AS `forums_topics` ON forums_posts.topic_id=forums_topics.tid AND ( forums_topics.approved=1 OR ( forums_topics.approved=0 AND forums_topics.starter_id=6158 ) ) 
AND forums_topics.approved!=-2 AND forums_topics.approved !=-3  LEFT JOIN `forum_forums_forums` AS `forums_forums` ON forums_topics.forum_id=forums_forums.id AND forums_forums.password IS NULL AND forums_forums.can_view_others=1 AND ( forums_forums.password IS NULL OR ( FIND_IN_SET(6,forums_forums.password_override) ) ) AND forums_forums.min_posts_view<='?' WHERE ( forums_forums.can_view_others='1' OR forums_topics.starter_id='?' )
 AND queued='?' AND forums_posts.queued!='-2' AND forums_posts.queued !='-3' AND 
 forums_topics.forum_id IN(1,14,15,17,21,5281,5279,5280,27,32,36,38,39,40,41,42,43,46,47,48,49,50,361,57,60,6126,6128,6130,67,6148,6151,82,90,92,5943,5944,97,99,101,151,176,2150,149,35,1667,150,4447,178,6164,128,129,134,135,162,4561,4562,6199,6132,6133,6359,4375,5983,1060,364,372,6240,6241,6145,362,365,366,367,369,370,373,6249,374,6352,375,6253,6254,376,5980,378,6251,6252,379,381,5982,6165,6166,6167,6176,6170,6171,6172,6173,6174,5893,6134,6135,6136,6137,6150,5284,497,5183,6142,6144,551,569,2325,605,6161,6162,654,9,4711,4432,1857,6179,6326,6196,6197,4713,1217,6178,2249,4712,1116,1117,1118,1119,1120,1121,1105,100,80,1239,1240,1241,1123,1124,1127,5277,5278,5108,5087,4082,1218,5964,1243,1244,1245,1247,1858,6255,2250,1248,1249,2172,1920,6152,1861,1317,4708,6263,1346,4710,4480,5987,4481,4515,6261,4709,1447,1448,1449,1917,2029,1475,1929,4704,4705,4706,1556,1928,1591,1585,1586,1855,5106,6131,5153,1859,5156,5157,5158,4748,4749,4750,4083,2032,2033,6347,2039,6284,5285,6243,5988,4479,2324,6101,2173,4486,5090,5089,2027,2201,2202,2203,2204,2205,2206,2207,1338,2236,2235,6245,2234,6244,5249,2238,2239,6246,5058,2251,2252,2253,6207,2255,2256,2257,2258,2260,5149,5102,5749,5100,5060,6163,2440,2441,5103,5104,5062,5000,2450,2537,2561,2829,5061,3029,3030,3031,3032,6262,3081,3157,6280,4999,3471,3472,3474,3475,3476,4377,4379,5984,6344,4909,4939,4938,4898,4899,4900,4901,4934,4935,4564,6259,2437,4880,4879,6201,5148,5146,3959,3960,3961,3962,6177,6157,6158,6160,6200,4220,4221,4222,4224,4560,4936,4892,4893,5118,5111,4394,4477,5985,4622,10,6206,12,554,6205,4992,4993,4251,4995,5059,4985,6124,4476,4922,4277,4278,4281,4620,4306,4618,4619,4309,4308,4307,4303,4304,4305,5184,4478,5986,132,1348,5247,5882,5145,5142,4279,4330,4331,4332,4333,4334,4335,5196,5057,5578,5577,4403,4402,4401,4400,4399,4398,4397,4396,4374,6123,4395,4373,1122,78,5120,5121,5091,5947,4764,5465,4675,4676,5283,5185,5187,5188,4707,5945,102,5113,5286,4996,6351,5182,5899,5147,4823,23,6266,5466,4910,5181,5143,5179,5154,6153,5250,5150,4862,6360,4882,4883,4884,4885,4886,4887,4888,4940,4941,4942,4943,4944,1343,5088,1345,5180,4891,4994,5946,6260,5105,5063,4812,5287,5302,5303,5304,5305,5306,5307,5308,6250,6230,6231,6232,6233,6234,6235,6236,5503,5502,6265,5979,6242,5390,5391,5392,5595,5594,5592,5591,5596,5597,5598,5599,6257,5883,5659,5660,5661,5662,5663,6256,5891,5695,5696,6346,6345,6339,6340,6341,6342,5720,5721,5722,5723,5724,5725,6279,6277,5812,5813,5814,5816,6343,6285,6286,6283,6258,6281,6282,6353,6354,6218,6229,6389,6357,6356,6355,6337,6084,6085,6086,6087,6088,6089,6090,6041,6042,6040,6037,6038,6209,6210,6212,6213,6214,6215,6216,6054,6055,6056,6057,6058,6059,6060,6061,6062,6064,6065,6066,6067,6068,6070,6071,6072,6073,6074,6093,6092,6082,6081,6080,6094,6095,6096,6097,6098,6102,6103,6104,6119,6120,6121,6325,6111,6112,6113,6114,6115,6116,6117,6298,6372,6300,6301,6302,6303,6304,6373,6387,6388,6349,6348,6330,6328,6329,6327,6365,6366,6367,6386,6385,6374,6375,6376,6377,6378,6390,6380,6381,6382,6383,6391,6392,6393,6394,6395,6397,6398,6399,6400,6401,6402,6403,6404,6405,6406,6407,6408) ORDER BY post_date DESC LIMIT 10

Connection ID (thread ID): 1665
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 https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /var/lib/mysql
Resource Limits:
Limit                     Soft Limit           Hard Limit           Units     
Max cpu time              unlimited            unlimited            seconds   
Max file size             unlimited            unlimited            bytes     
Max data size             unlimited            unlimited            bytes     
Max stack size            8388608              unlimited            bytes     
Max core file size        0                    unlimited            bytes     
Max resident set          unlimited            unlimited            bytes     
Max processes             256160               256160               processes 
Max open files            16384                16384                files     
Max locked memory         65536                65536                bytes     
Max address space         unlimited            unlimited            bytes     
Max file locks            unlimited            unlimited            locks     
Max pending signals       256160               256160               signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
Max realtime timeout      unlimited            unlimited            us        
Core pattern: core

2021-03-24  0:32:17 0 [Note] InnoDB: Uses event mutexes
2021-03-24  0:32:17 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2021-03-24  0:32:17 0 [Note] InnoDB: Number of pools: 1
2021-03-24  0:32:17 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions
2021-03-24  0:32:17 0 [Note] mariadbd: O_TMPFILE is not supported on /tmp (disabling future attempts)
2021-03-24  0:32:17 0 [Note] InnoDB: Using Linux native AIO
2021-03-24  0:32:17 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728
2021-03-24  0:32:17 0 [Note] InnoDB: Completed initialization of buffer pool
2021-03-24  0:32:17 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2021-03-24  0:32:17 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=75840139118,75840139118
2021-03-24  0:32:17 0 [Note] InnoDB: Starting final batch to recover 13 pages from redo log.
2021-03-24  0:32:18 0 [Note] InnoDB: 128 rollback segments are active.
2021-03-24  0:32:18 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"
2021-03-24  0:32:18 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2021-03-24  0:32:18 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2021-03-24  0:32:18 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2021-03-24  0:32:18 0 [Note] InnoDB: 10.5.9 started; log sequence number 75840200402; transaction id 14135010
2021-03-24  0:32:18 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
2021-03-24  0:32:18 0 [Note] Plugin 'FEEDBACK' is disabled.
2021-03-24  0:32:18 0 [Note] Server socket created on IP: '0.0.0.0'.
2021-03-24  0:32:18 0 [Note] Reading of all Master_info entries succeeded
2021-03-24  0:32:18 0 [Note] Added new Master_info '' to hash table
2021-03-24  0:32:18 0 [Note] /usr/sbin/mariadbd: ready for connections.
Version: '10.5.9-MariaDB-1:10.5.9+maria~focal'  socket: '/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution
2021-03-24  0:32:18 0 [Note] InnoDB: Buffer pool(s) load completed at 210324  0:32:18
2021-03-24  0:32:20 419 [ERROR] mariadbd: Table './usp_forum/forum_core_store' is marked as crashed and should be repaired
2021-03-24  0:32:20 419 [Warning] Checking table:   './usp_forum/forum_core_store'
2021-03-24  0:32:20 419 [ERROR] mariadbd: Table './usp_forum/forum_core_sessions' is marked as crashed and should be repaired
2021-03-24  0:32:20 419 [Warning] Checking table:   './usp_forum/forum_core_sessions'
2021-03-24  0:32:20 419 [ERROR] mariadbd: Table './usp_forum/forum_core_output_cache' is marked as crashed and should be repaired
2021-03-24  0:32:20 419 [Warning] Checking table:   './usp_forum/forum_core_output_cache'
2021-03-24  0:32:20 419 [ERROR] mariadbd: Table './usp_forum/forum_core_members' is marked as crashed and should be repaired
2021-03-24  0:32:20 419 [Warning] Checking table:   './usp_forum/forum_core_members'
2021-03-24  0:32:20 419 [ERROR] mariadbd: Table './usp_forum/forum_forums_topics' is marked as crashed and should be repaired
2021-03-24  0:32:20 419 [Warning] Checking table:   './usp_forum/forum_forums_topics'
2021-03-24  0:32:20 495 [ERROR] mariadbd: Table './usp_forum/forum_core_members_known_devices' is marked as crashed and should be repaired
2021-03-24  0:32:20 495 [Warning] Checking table:   './usp_forum/forum_core_members_known_devices'
2021-03-24  0:32:20 511 [ERROR] mariadbd: Table './usp_forum/forum_core_item_markers' is marked as crashed and should be repaired
2021-03-24  0:32:20 511 [Warning] Checking table:   './usp_forum/forum_core_item_markers'
2021-03-24  0:32:20 533 [ERROR] mariadbd: Table './usp_forum/forum_core_view_updates' is marked as crashed and should be repaired
2021-03-24  0:32:20 533 [Warning] Checking table:   './usp_forum/forum_core_view_updates'
2021-03-24  0:32:21 576 [ERROR] mariadbd: Table './usp_forum/forum_gflcore_servers' is marked as crashed and should be repaired
2021-03-24  0:32:21 576 [Warning] Checking table:   './usp_forum/forum_gflcore_servers'
2021-03-24  0:32:21 596 [ERROR] mariadbd: Table './usp_forum/forum_core_queue' is marked as crashed and should be repaired
2021-03-24  0:32:21 596 [Warning] Checking table:   './usp_forum/forum_core_queue'
2021-03-24  0:32:21 678 [ERROR] mariadbd: Table './usp_forum/forum_core_tasks_log' is marked as crashed and should be repaired
2021-03-24  0:32:21 678 [Warning] Checking table:   './usp_forum/forum_core_tasks_log'
2021-03-24  0:32:21 693 [ERROR] mariadbd: Table './usp_forum/forum_core_widgets' is marked as crashed and should be repaired
2021-03-24  0:32:21 693 [Warning] Checking table:   './usp_forum/forum_core_widgets'
2021-03-24  0:32:21 707 [ERROR] mariadbd: Table './usp_forum/forum_trophies_members' is marked as crashed and should be repaired
2021-03-24  0:32:21 707 [Warning] Checking table:   './usp_forum/forum_trophies_members'
2021-03-24  0:32:21 710 [ERROR] mariadbd: Table './usp_forum/forum_core_notifications' is marked as crashed and should be repaired
2021-03-24  0:32:21 710 [Warning] Checking table:   './usp_forum/forum_core_notifications'
2021-03-24  0:32:21 719 [ERROR] mariadbd: Table './usp_forum/forum_core_statistics' is marked as crashed and should be repaired
2021-03-24  0:32:21 719 [Warning] Checking table:   './usp_forum/forum_core_statistics'
2021-03-24  0:32:22 802 [ERROR] mariadbd: Table './usp_forum/forum_core_tasks' is marked as crashed and should be repaired
2021-03-24  0:32:22 802 [Warning] Checking table:   './usp_forum/forum_core_tasks'
2021-03-24  0:32:22 827 [ERROR] mariadbd: Table './usp_forum/forum_gflcore_stats' is marked as crashed and should be repaired
2021-03-24  0:32:22 827 [Warning] Checking table:   './usp_forum/forum_gflcore_stats'
2021-03-24  0:32:22 888 [ERROR] mariadbd: Table './usp_forum/forum_topic_viewedby' is marked as crashed and should be repaired
2021-03-24  0:32:22 888 [Warning] Checking table:   './usp_forum/forum_topic_viewedby'
2021-03-24  0:32:22 892 [ERROR] mariadbd: Table './usp_forum/forum_core_sitemap' is marked as crashed and should be repaired
2021-03-24  0:32:22 892 [Warning] Checking table:   './usp_forum/forum_core_sitemap'
2021-03-24  0:32:22 930 [ERROR] mariadbd: Table './usp_forum/forum_core_advertisements' is marked as crashed and should be repaired
2021-03-24  0:32:22 930 [Warning] Checking table:   './usp_forum/forum_core_advertisements'
2021-03-24  0:32:22 931 [ERROR] mariadbd: Table './usp_forum/forum_core_sys_conf_settings' is marked as crashed and should be repaired
2021-03-24  0:32:22 931 [Warning] Checking table:   './usp_forum/forum_core_sys_conf_settings'
2021-03-24  0:32:22 968 [ERROR] mariadbd: Table './usp_forum/forum_steam_profiles' is marked as crashed and should be repaired
2021-03-24  0:32:22 968 [Warning] Checking table:   './usp_forum/forum_steam_profiles'
2021-03-24  0:32:22 973 [ERROR] mariadbd: Table './usp_forum/forum_core_members_known_ip_addresses' is marked as crashed and should be repaired
2021-03-24  0:32:22 973 [Warning] Checking table:   './usp_forum/forum_core_members_known_ip_addresses'