2026-03-14 1:52:33 0 [Note] InnoDB: End of log at LSN=7075668 2026-03-14 1:52:33 0 [Note] InnoDB: To recover: 204 pages 2026-03-14 1:52:34 0 [Note] InnoDB: Opened 3 undo tablespaces 2026-03-14 1:52:34 0 [Note] InnoDB: 128 rollback segments in 3 undo tablespaces are active. 2026-03-14 1:52:34 0 [Note] InnoDB: Removed temporary tablespace data file: "./ibtmp1" 2026-03-14 1:52:34 0 [Note] InnoDB: Setting file './ibtmp1' size to 12.000MiB. Physically writing the file full; Please wait ... 2026-03-14 1:52:34 0 [Note] InnoDB: File './ibtmp1' size is now 12.000MiB. 2026-03-14 1:52:34 0 [Note] InnoDB: log sequence number 7075668; transaction id 14616 2026-03-14 1:52:34 0 [Note] InnoDB: Loading buffer pool(s) from /home/fuzzysql/llmsql/fuzz/bugreplay/mariadbdata/ib_buffer_pool 2026-03-14 1:52:34 0 [Note] Plugin 'FEEDBACK' is disabled. 2026-03-14 1:52:34 0 [Note] Plugin 'wsrep-provider' is disabled. 2026-03-14 1:52:34 0 [Note] InnoDB: Buffer pool(s) load completed at 260314 1:52:34 2026-03-14 1:52:34 0 [Note] Recovering after a crash using tc.log 2026-03-14 1:52:34 0 [Note] Starting table crash recovery... 2026-03-14 1:52:34 0 [Note] Crash table recovery finished. 2026-03-14 1:52:34 0 [Note] Server socket created on IP: '0.0.0.0'. 2026-03-14 1:52:34 0 [Note] Server socket created on IP: '::'. 2026-03-14 1:52:34 0 [Note] mariadbd: Event Scheduler: Loaded 0 events 2026-03-14 1:52:34 2 [Note] Reading Master_info: 'master-channel1.info' Relay_info:'relay-log-channel1.info' 2026-03-14 1:52:34 2 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MariaDB server acts as a replica and has its hostname changed. Please use '--log-basename=#' or '--relay-log=a796d126d77d-relay-bin' to avoid this problem. 2026-03-14 1:52:34 2 [Note] Initialized Master_info from 'master-channel1.info' 2026-03-14 1:52:34 3 [Note] Master 'channel1': Slave I/O thread: Start asynchronous replication to master '@:3306' in log '' at position 4 2026-03-14 1:52:34 3 [ERROR] Master 'channel1': Slave I/O: Fatal error: Invalid (empty) username when attempting to connect to the master server. Connection attempt terminated. Internal MariaDB error code: 1593 2026-03-14 1:52:34 3 [Note] Master 'channel1': Slave I/O thread killed while connecting to master 2026-03-14 1:52:34 3 [Note] Master 'channel1': Slave I/O thread exiting, read up to log 'FIRST', position 4; GTID position , master :3306 2026-03-14 1:52:34 2 [Note] Started replication for 'channel1' 2026-03-14 1:52:34 4 [Note] Master 'channel1': Slave SQL thread initialized, starting replication in log 'FIRST' at position 4, relay log './a796d126d77d-relay-bin-channel1.000001' position: 4; GTID position '' 2026-03-14 1:52:34 2 [Note] Reading Master_info: 'master-replication_channel.info' Relay_info:'relay-log-replication_channel.info' 2026-03-14 1:52:34 2 [Note] Initialized Master_info from 'master-replication_channel.info' 2026-03-14 1:52:34 5 [Note] Master 'replication_channel': Slave I/O thread: Start asynchronous replication to master '@:3306' in log '' at position 4 2026-03-14 1:52:34 5 [ERROR] Master 'replication_channel': Slave I/O: Fatal error: Invalid (empty) username when attempting to connect to the master server. Connection attempt terminated. Internal MariaDB error code: 1593 2026-03-14 1:52:34 5 [Note] Master 'replication_channel': Slave I/O thread killed while connecting to master 2026-03-14 1:52:34 5 [Note] Master 'replication_channel': Slave I/O thread exiting, read up to log 'FIRST', position 4; GTID position , master :3306 2026-03-14 1:52:34 2 [Note] Started replication for 'replication_channel' 2026-03-14 1:52:34 6 [Note] Master 'replication_channel': Slave SQL thread initialized, starting replication in log 'FIRST' at position 4, relay log './a796d126d77d-relay-bin-replication_channel.000001' position: 4; GTID position '' 2026-03-14 1:52:34 0 [Note] /usr/local/mysql/bin/mariadbd: ready for connections. Version: '11.4.0-MariaDB-debug' socket: '/tmp/mysql.sock' port: 3306 Source distribution 260314 1:52:36 [ERROR] mysqld got signal 11 ; Sorry, we probably made a mistake, and this is a bug. Your assistance in bug reporting will enable us to fix this for the next release. 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: 11.4.0-MariaDB-debug source revision: a82ab43fcb5404e1b2ab8744eb34ab717d71b6d9 key_buffer_size=134217728 read_buffer_size=131072 max_used_connections=1 max_threads=153 thread_count=3 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 468189 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x62c000210288 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 = 0x7fffd4209bf8 thread_stack 0x49000 addr2line: DWARF error: invalid or unhandled FORM value: 0x25 /usr/local/mysql/bin/mariadbd(__interceptor_backtrace+0x5b)[0x555555ee728b] /usr/local/mysql/bin/mariadbd(my_print_stacktrace+0x127)[0x555557740ae7] /usr/local/mysql/bin/mariadbd(handle_fatal_signal+0x472)[0x555556788c22] sigaction.c:0(__restore_rt)[0x7ffff7c26420] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (0x62900014a2a8): SELECT v1, v2, v3, ENCRYPT('secret', 'salt') AS crypt_encrypted FROM t2 Connection ID (thread ID): 7 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,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,cset_narrowing=off,sargable_casefold=on The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mariadbd/ contains information that should help you find out what is causing the crash. Writing a core file... Working directory at /home/fuzzysql/llmsql/fuzz/bugreplay/mariadbdata 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 unlimited unlimited processes Max open files 1048576 1048576 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 1029288 1029288 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 Kernel version: Linux version 5.15.0-119-generic (buildd@lcy02-amd64-068) (gcc (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #129~20.04.1-Ubuntu SMP Wed Aug 7 13:07:13 UTC 2024 2026-03-14 1:52:36 0 [Note] Starting MariaDB 11.4.0-MariaDB-debug source revision a82ab43fcb5404e1b2ab8744eb34ab717d71b6d9 as process 605972 2026-03-14 1:52:36 0 [Note] InnoDB: !!!!!!!! UNIV_DEBUG switched on !!!!!!!!! 2026-03-14 1:52:36 0 [Note] InnoDB: Compressed tables use zlib 1.2.11 2026-03-14 1:52:36 0 [Note] InnoDB: Number of transaction pools: 1 2026-03-14 1:52:36 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions 2026-03-14 1:52:36 0 [Note] mariadbd: O_TMPFILE is not supported on /tmp (disabling future attempts) 2026-03-14 1:52:36 0 [Note] InnoDB: Initializing buffer pool, total size = 128.000MiB, chunk size = 2.000MiB 2026-03-14 1:52:36 0 [Note] InnoDB: Completed initialization of buffer pool 2026-03-14 1:52:36 0 [Note] InnoDB: Buffered log writes (block size=512 bytes) 2026-03-14 1:52:36 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=55108 2026-03-14 1:52:37 0 [Note] InnoDB: End of log at LSN=7101717 2026-03-14 1:52:37 0 [Note] InnoDB: To recover: 204 pages 2026-03-14 1:52:37 0 [Note] InnoDB: Opened 3 undo tablespaces 2026-03-14 1:52:37 0 [Note] InnoDB: 128 rollback segments in 3 undo tablespaces are active. 2026-03-14 1:52:37 0 [Note] InnoDB: Removed temporary tablespace data file: "./ibtmp1" 2026-03-14 1:52:37 0 [Note] InnoDB: Setting file './ibtmp1' size to 12.000MiB. Physically writing the file full; Please wait ... 2026-03-14 1:52:37 0 [Note] InnoDB: File './ibtmp1' size is now 12.000MiB. 2026-03-14 1:52:37 0 [Note] InnoDB: log sequence number 7101717; transaction id 14667 2026-03-14 1:52:37 0 [Note] InnoDB: Loading buffer pool(s) from /home/fuzzysql/llmsql/fuzz/bugreplay/mariadbdata/ib_buffer_pool 2026-03-14 1:52:37 0 [Note] Plugin 'FEEDBACK' is disabled. 2026-03-14 1:52:37 0 [Note] InnoDB: Buffer pool(s) load completed at 260314 1:52:37 2026-03-14 1:52:37 0 [Note] Plugin 'wsrep-provider' is disabled. 2026-03-14 1:52:37 0 [Note] Recovering after a crash using tc.log 2026-03-14 1:52:37 0 [Note] Starting table crash recovery... 2026-03-14 1:52:37 0 [Note] Crash table recovery finished. 2026-03-14 1:52:37 0 [Note] Server socket created on IP: '0.0.0.0'. 2026-03-14 1:52:37 0 [Note] Server socket created on IP: '::'. 2026-03-14 1:52:37 0 [Note] mariadbd: Event Scheduler: Loaded 0 events 2026-03-14 1:52:37 2 [Note] Reading Master_info: 'master-channel1.info' Relay_info:'relay-log-channel1.info' 2026-03-14 1:52:37 2 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MariaDB server acts as a replica and has its hostname changed. Please use '--log-basename=#' or '--relay-log=a796d126d77d-relay-bin' to avoid this problem. 2026-03-14 1:52:37 2 [Note] Initialized Master_info from 'master-channel1.info' 2026-03-14 1:52:37 3 [Note] Master 'channel1': Slave I/O thread: Start asynchronous replication to master '@:3306' in log '' at position 4 2026-03-14 1:52:37 3 [ERROR] Master 'channel1': Slave I/O: Fatal error: Invalid (empty) username when attempting to connect to the master server. Connection attempt terminated. Internal MariaDB error code: 1593 2026-03-14 1:52:37 3 [Note] Master 'channel1': Slave I/O thread killed while connecting to master 2026-03-14 1:52:37 3 [Note] Master 'channel1': Slave I/O thread exiting, read up to log 'FIRST', position 4; GTID position , master :3306 2026-03-14 1:52:37 2 [Note] Started replication for 'channel1' 2026-03-14 1:52:37 4 [Note] Master 'channel1': Slave SQL thread initialized, starting replication in log 'FIRST' at position 4, relay log './a796d126d77d-relay-bin-channel1.000001' position: 4; GTID position '' 2026-03-14 1:52:37 2 [Note] Reading Master_info: 'master-replication_channel.info' Relay_info:'relay-log-replication_channel.info' 2026-03-14 1:52:37 2 [Note] Initialized Master_info from 'master-replication_channel.info' 2026-03-14 1:52:37 5 [Note] Master 'replication_channel': Slave I/O thread: Start asynchronous replication to master '@:3306' in log '' at position 4 2026-03-14 1:52:37 5 [ERROR] Master 'replication_channel': Slave I/O: Fatal error: Invalid (empty) username when attempting to connect to the master server. Connection attempt terminated. Internal MariaDB error code: 1593 2026-03-14 1:52:37 5 [Note] Master 'replication_channel': Slave I/O thread killed while connecting to master 2026-03-14 1:52:37 5 [Note] Master 'replication_channel': Slave I/O thread exiting, read up to log 'FIRST', position 4; GTID position , master :3306 2026-03-14 1:52:37 2 [Note] Started replication for 'replication_channel' 2026-03-14 1:52:37 6 [Note] Master 'replication_channel': Slave SQL thread initialized, starting replication in log 'FIRST' at position 4, relay log './a796d126d77d-relay-bin-replication_channel.000001' position: 4; GTID position '' 2026-03-14 1:52:37 0 [Note] /usr/local/mysql/bin/mariadbd: ready for connections. Version: '11.4.0-MariaDB-debug' socket: '/tmp/mysql.sock' port: 3306 Source distribution 2026-03-14 1:52:53 7 [Warning] Aborted connection 7 to db: 'test_db' user: 'dobigthing' host: 'localhost' (Got an error reading communication packets)