2026-03-15  9:42:28 0 [Note] InnoDB: End of log at LSN=129108856
2026-03-15  9:42:28 0 [Note] InnoDB: To recover: 165 pages
2026-03-15  9:42:28 0 [Note] InnoDB: Opened 3 undo tablespaces
2026-03-15  9:42:28 0 [Note] InnoDB: 128 rollback segments in 3 undo tablespaces are active.
2026-03-15  9:42:28 0 [Note] InnoDB: Removed temporary tablespace data file: "./ibtmp1"
2026-03-15  9:42:28 0 [Note] InnoDB: Setting file './ibtmp1' size to 12.000MiB. Physically writing the file full; Please wait ...
2026-03-15  9:42:28 0 [Note] InnoDB: File './ibtmp1' size is now 12.000MiB.
2026-03-15  9:42:28 0 [Note] InnoDB: log sequence number 129108856; transaction id 57322
2026-03-15  9:42:28 0 [Note] InnoDB: Loading buffer pool(s) from /home/fuzzysql/llmsql/fuzz/mariadbdata/ib_buffer_pool
2026-03-15  9:42:28 0 [Note] Plugin 'FEEDBACK' is disabled.
2026-03-15  9:42:28 0 [Note] Plugin 'wsrep-provider' is disabled.
2026-03-15  9:42:28 0 [Note] InnoDB: Buffer pool(s) load completed at 260315  9:42:28
2026-03-15  9:42:28 0 [Note] Recovering after a crash using tc.log
2026-03-15  9:42:28 0 [Note] Starting table crash recovery...
2026-03-15  9:42:28 0 [Note] Crash table recovery finished.
2026-03-15  9:42:28 0 [Note] Server socket created on IP: '0.0.0.0'.
2026-03-15  9:42:28 0 [Note] Server socket created on IP: '::'.
2026-03-15  9:42:28 0 [Note] mariadbd: Event Scheduler: Loaded 0 events
2026-03-15  9:42:28 0 [Note] /usr/local/mysql/bin/mariadbd: ready for connections.
Version: '11.8.1-MariaDB-debug'  socket: '/tmp/mysql.sock'  port: 3306  Source distribution
mariadbd: /home/mariadb/sql/item_func.cc:7075: virtual longlong Item_func_nextval::val_int(): Assertion `table && table->s->sequence' failed.
260315  9:42:30 [ERROR] /usr/local/mysql/bin/mariadbd got signal 6 ;
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 about how to report
a bug on https://jira.mariadb.org/.

Please include the information from the server start above, to the end of the
information below.

Server version: 11.8.1-MariaDB-debug source revision: 1c4aed7c680c0402d6e97e097f03815c0e9bf4c5

The information page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mariadbd/
contains instructions to obtain a better version of the backtrace below.
Following these instructions will help MariaDB developers provide a fix quicker.

Attempting backtrace. Include this in the bug report.
(note: Retrieving this information may fail)

Thread pointer: 0x62c0001e0288
stack_bottom = 0x7fffceddd000 thread_stack 0x49000
addr2line: DWARF error: invalid or unhandled FORM value: 0x25
/usr/local/mysql/bin/mariadbd(__interceptor_backtrace+0x5b)[0x555555f30feb]
/usr/local/mysql/bin/mariadbd(my_print_stacktrace+0x127)[0x5555578409a7]
/usr/local/mysql/bin/mariadbd(handle_fatal_signal+0x29f)[0x55555681e11f]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7ffff7c26420]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7ffff770b00b]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7ffff76ea859]
/lib/x86_64-linux-gnu/libc.so.6(+0x22729)[0x7ffff76ea729]
/lib/x86_64-linux-gnu/libc.so.6(+0x33fd6)[0x7ffff76fbfd6]
addr2line: DWARF error: invalid or unhandled FORM value: 0x25
/usr/local/mysql/bin/mariadbd(_ZN17Item_func_nextval7val_intEv+0x62e)[0x55555693878e]
/usr/local/mysql/bin/mariadbd(_ZN4Item17save_int_in_fieldEP5Fieldb+0x35)[0x55555687c745]
/usr/local/mysql/bin/mariadbd(_ZN4Item13save_in_fieldEP5Fieldb+0x4c)[0x55555687c8fc]
/usr/local/mysql/bin/mariadbd(_ZN5Field11set_defaultEv+0x95)[0x5555567bc115]
/usr/local/mysql/bin/mariadbd(_ZN18Item_default_value13save_in_fieldEP5Fieldb+0x85)[0x55555688d455]
/usr/local/mysql/bin/mariadbd(_Z11fill_recordP3THDP5TABLER4ListI4ItemES6_bb+0x4e8)[0x5555561379f8]
/usr/local/mysql/bin/mariadbd(_Z36fill_record_n_invoke_before_triggersP3THDP5TABLER4ListI4ItemES6_b14trg_event_typePb+0x5c)[0x555556138d8c]
/usr/local/mysql/bin/mariadbd(_ZN14Sql_cmd_update19update_single_tableEP3THD+0x32e6)[0x555556470236]
/usr/local/mysql/bin/mariadbd(_ZN14Sql_cmd_update13execute_innerEP3THD+0x94)[0x55555647d784]
/usr/local/mysql/bin/mariadbd(_ZN11Sql_cmd_dml7executeEP3THD+0x293)[0x555556377c23]
/usr/local/mysql/bin/mariadbd(_Z21mysql_execute_commandP3THDb+0x47cf)[0x5555562415af]
/usr/local/mysql/bin/mariadbd(_Z11mysql_parseP3THDPcjP12Parser_state+0x528)[0x555556231bc8]
/usr/local/mysql/bin/mariadbd(_Z16dispatch_command19enum_server_commandP3THDPcjb+0x2080)[0x55555622d210]
/usr/local/mysql/bin/mariadbd(_Z10do_commandP3THDb+0x7c3)[0x555556232a13]
/usr/local/mysql/bin/mariadbd(_Z24do_handle_one_connectionP7CONNECTb+0x324)[0x55555652b574]
/usr/local/mysql/bin/mariadbd(handle_one_connection+0x19d)[0x55555652b15d]
/usr/local/mysql/bin/mariadbd(pfs_spawn_thread+0xff)[0x555556f059cf]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x8609)[0x7ffff7c1a609]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x43)[0x7ffff77e7353]

Connection ID (thread ID): 3
Status: NOT_KILLED
Query (0x62d0003d44a8): UPDATE t3 SET v1 = DEFAULT, v2 = DEFAULT, v3 = DEFAULT, v4 = DEFAULT, seq_val = DEFAULT WHERE id = 1
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=on,sargable_casefold=on

Writing a core file...
Working directory at /home/fuzzysql/llmsql/fuzz/mariadbdata
Resource Limits (excludes unlimited resources):
Limit                     Soft Limit           Hard Limit           Units     
Max stack size            8388608              unlimited            bytes     
Max core file size        0                    unlimited            bytes     
Max open files            1048576              1048576              files     
Max locked memory         65536                65536                bytes     
Max pending signals       1029288              1029288              signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
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

2026-03-15  9:42:31 0 [Note] Starting MariaDB 11.8.1-MariaDB-debug source revision 1c4aed7c680c0402d6e97e097f03815c0e9bf4c5 server_uid w4t3zVyPMupQjkMu1bsMP24iETc= as process 711568
2026-03-15  9:42:31 0 [Note] InnoDB: !!!!!!!! UNIV_DEBUG switched on !!!!!!!!!
2026-03-15  9:42:31 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2026-03-15  9:42:31 0 [Note] InnoDB: Number of transaction pools: 1
2026-03-15  9:42:31 0 [Note] InnoDB: Using AVX512 instructions
2026-03-15  9:42:31 0 [Note] mariadbd: O_TMPFILE is not supported on /tmp (disabling future attempts)
2026-03-15  9:42:31 0 [Note] InnoDB: Initializing buffer pool, total size = 128.000MiB, chunk size = 2.000MiB
2026-03-15  9:42:31 0 [Note] InnoDB: Completed initialization of buffer pool
2026-03-15  9:42:31 0 [Note] InnoDB: Buffered log writes (block size=512 bytes)
2026-03-15  9:42:31 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=123687163