# mysqld options used (likely many or most are not required): --max_allowed_packet=33554432 --maximum-bulk_insert_buffer_size=1M --maximum-join_buffer_size=1M --maximum-max_heap_table_size=1M --maximum-max_join_size=1M --maximum-myisam_max_sort_file_size=1M --maximum-myisam_mmap_size=1M --maximum-myisam_sort_buffer_size=1M --maximum-optimizer_trace_max_mem_size=1M --maximum-preload_buffer_size=1M --maximum-query_alloc_block_size=1M --maximum-query_prealloc_size=1M --maximum-range_alloc_block_size=1M --maximum-read_buffer_size=1M --maximum-read_rnd_buffer_size=1M --maximum-sort_buffer_size=1M --maximum-tmp_table_size=1M --maximum-transaction_alloc_block_size=1M --maximum-transaction_prealloc_size=1M --log-output=none --sql_mode=ONLY_FULL_GROUP_BY --innodb_file_per_table=1 --innodb_flush_method=O_DIRECT --innodb_stats_persistent=off --loose-idle_write_transaction_timeout=0 --loose-idle_transaction_timeout=0 --loose-idle_readonly_transaction_timeout=0 --connect_timeout=60 --interactive_timeout=28800 --slave_net_timeout=60 --net_read_timeout=30 --net_write_timeout=60 --loose-table_lock_wait_timeout=50 --wait_timeout=28800 --lock-wait-timeout=86400 --innodb-lock-wait-timeout=50 --log_output=FILE --log-bin --log_bin_trust_function_creators=1 --loose-max-statement-time=30 --loose-debug_assert_on_not_freed_memory=0 --innodb-buffer-pool-size=300M

SET GLOBAL innodb_stats_persistent=1;#NOERROR

SET GLOBAL innodb_change_buffering_debug=1;#NOERROR

SET @@GLOBAL.innodb_limit_optimistic_insert_debug = 2;#NOERROR

CREATE TABLE t1(c1 DATE NULL, c2 BINARY(25) NOT NULL, c3 SMALLINT(4) NULL, c4 BINARY(15) NOT NULL PRIMARY KEY, c5 DATE NOT NULL UNIQUE KEY,c6 NUMERIC(10,8) NOT NULL DEFAULT 3.141592);#NOERROR                                               

ALTER TABLE t1 MODIFY COLUMN c2 YEAR(2); ;

SELECT SLEEP(3);   # Likely not required

Core was generated by `/test/MD010121-mariadb-10.6.0-linux-x86_64-dbg/bin/mysqld --no-defaults --max_a'.

Program terminated with signal SIGABRT, Aborted.

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6)

    at ../sysdeps/unix/sysv/linux/pthread_kill.c:56

[Current thread is 1 (Thread 0x1497a59f0700 (LWP 3581261))]

(gdb) bt

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:56

#1  0x000055c8bec6a0d7 in my_write_core (sig=sig@entry=6) at /test/10.6_dbg/mysys/stacktrace.c:424

#2  0x000055c8be3feab1 in handle_fatal_signal (sig=6) at /test/10.6_dbg/sql/signal_handler.cc:330

#3  <signal handler called>

#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50

#5  0x00001497da723859 in __GI_abort () at abort.c:79

#6  0x000055c8bea4b263 in ib::fatal::~fatal (this=<optimized out>, __in_chrg=<optimized out>) at /test/10.6_dbg/storage/innobase/ut/ut0ut.cc:573                                                                                              

#7  0x000055c8be9f4b88 in srv_monitor_task () at /test/10.6_dbg/storage/innobase/include/ut0ut.h:412

#8  0x000055c8bebf55a0 in tpool::thread_pool_generic::timer_generic::run (this=0x55c8c22e4cc0) at /test/10.6_dbg/tpool/tpool_generic.cc:309                                                                                                   

#9  tpool::thread_pool_generic::timer_generic::execute (arg=0x55c8c22e4cc0) at /test/10.6_dbg/tpool/tpool_generic.cc:329                                                                                                                      

#10 0x000055c8bebf650f in tpool::task::execute (this=0x55c8c22e4d00) at /test/10.6_dbg/tpool/task.cc:52

#11 0x000055c8bebf50b9 in tpool::thread_pool_generic::worker_main (this=0x55c8c1b7ee40, thread_var=0x55c8c1b8e5e0) at /test/10.6_dbg/tpool/tpool_generic.cc:546                                                                               

#12 0x000055c8bebf53f2 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__t=<optimized out>, __f=<optimized out>) at /usr/include/c++/9/bits/invoke.h:89                                                                                                                    

#13 std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=<optimized out>) at /usr/include/c++/9/bits/invoke.h:95                                                  

#14 std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=<optimized out>) at /usr/include/c++/9/thread:244         

#15 std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=<optimized out>) at /usr/include/c++/9/thread:251                       

#16 std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=<optimized out>) at /usr/include/c++/9/thread:195

#17 0x00001497dab15d84 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6

#18 0x00001497dac31609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#19 0x00001497da820293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

2021-01-16 17:25:21 0 [ERROR] [FATAL] InnoDB: innodb_fatal_semaphore_wait_threshold was exceeded for dict_sys.mutex. Please refer to https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/                                  

210116 17:25:21 [ERROR] mysqld got signal 6 ;