gcol.virtual_index_drop fails with LeakSanitizer errors

gcol.virtual_index_drop 'innodb'         [ pass ]    110

***Warnings generated in error logs during shutdown after running tests: gcol.virtual_index_drop

==3377123==ERROR: LeakSanitizer: detected memory leaks

SUMMARY: AddressSanitizer: 48 byte(s) leaked in 1 allocation(s).

Attempting backtrace. You can use the following information to find out

==3376918==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 48 byte(s) in 1 object(s) allocated from:

    #0 0x8c74ed in malloc (/mnt8t/bld/10.7-asan/bin/mariadbd+0x8c74ed)

    #1 0x28e80fc in ut_allocator<std::_Fwd_list_node<dict_v_idx_t>, true>::allocate(unsigned long, std::_Fwd_list_node<dict_v_idx_t> const*, unsigned int, bool, bool) /data/src/10.7/storage/innobase/include/ut0new.h:375:11

    #2 0x28e7d4e in ut_allocator<std::_Fwd_list_node<dict_v_idx_t>, true>::allocate(unsigned long) /data/src/10.7/storage/innobase/include/ut0new.h:321:41

    #3 0x28e7cfc in std::allocator_traits<ut_allocator<std::_Fwd_list_node<dict_v_idx_t>, true> >::allocate(ut_allocator<std::_Fwd_list_node<dict_v_idx_t>, true>&, unsigned long) /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/alloc_traits.h:314:20

    #4 0x28e7c41 in std::_Fwd_list_base<dict_v_idx_t, ut_allocator<dict_v_idx_t, true> >::_M_get_node() /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/forward_list.h:352:15

    #5 0x28e95bf in std::_Fwd_list_node<dict_v_idx_t>* std::_Fwd_list_base<dict_v_idx_t, ut_allocator<dict_v_idx_t, true> >::_M_create_node<dict_v_idx_t>(dict_v_idx_t&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/forward_list.h:360:26

    #6 0x28e92f4 in std::_Fwd_list_node_base* std::_Fwd_list_base<dict_v_idx_t, ut_allocator<dict_v_idx_t, true> >::_M_insert_after<dict_v_idx_t>(std::_Fwd_list_const_iterator<dict_v_idx_t>, dict_v_idx_t&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/forward_list.tcc:55:19

    #7 0x28e6aed in std::forward_list<dict_v_idx_t, ut_allocator<dict_v_idx_t, true> >::push_front(dict_v_idx_t&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/forward_list.h:862:15

    #8 0x301e462 in dict_index_add_col(dict_index_t*, dict_table_t const*, dict_col_t*, unsigned long) /data/src/10.7/storage/innobase/dict/dict0dict.cc:2272:20

    #9 0x3032e95 in dict_index_copy(dict_index_t*, dict_index_t const*, unsigned long, unsigned long) /data/src/10.7/storage/innobase/dict/dict0dict.cc:2332:3

    #10 0x301d644 in dict_index_build_internal_non_clust(dict_index_t*) /data/src/10.7/storage/innobase/dict/dict0dict.cc:2619:2

    #11 0x301794c in dict_index_add_to_cache(dict_index_t*&, unsigned long, dict_add_v_col_t const*) /data/src/10.7/storage/innobase/dict/dict0dict.cc:1987:6

    #12 0x2ff39ef in dict_create_index_step(que_thr_t*) /data/src/10.7/storage/innobase/dict/dict0crea.cc:1225:9

    #13 0x2b411ee in que_thr_step(que_thr_t*) /data/src/10.7/storage/innobase/que/que0que.cc:663:9

    #14 0x2b3fbfa in que_run_threads_low(que_thr_t*) /data/src/10.7/storage/innobase/que/que0que.cc:709:25

    #15 0x2b3f79b in que_run_threads(que_thr_t*) /data/src/10.7/storage/innobase/que/que0que.cc:729:2

    #16 0x288845e in create_index_dict(trx_t*, dict_index_t*, fil_encryption_t, unsigned int, dict_add_v_col_t const*) /data/src/10.7/storage/innobase/handler/handler0alter.cc:6080:2

    #17 0x286334d in prepare_inplace_alter_table_dict(Alter_inplace_info*, TABLE const*, TABLE const*, char const*, unsigned long, unsigned long, unsigned long, bool, bool) /data/src/10.7/storage/innobase/handler/handler0alter.cc:6942:12

    #18 0x2849cc8 in ha_innobase::prepare_inplace_alter_table(TABLE*, Alter_inplace_info*) /data/src/10.7/storage/innobase/handler/handler0alter.cc:8276:7

    #19 0x19f0733 in handler::ha_prepare_inplace_alter_table(TABLE*, Alter_inplace_info*) /data/src/10.7/sql/handler.cc:5171:10

    #20 0x11f8dce in mysql_inplace_alter_table(THD*, TABLE_LIST*, TABLE*, TABLE*, Alter_inplace_info*, MDL_request*, st_ddl_log_state*, TRIGGER_RENAME_PARAM*, Alter_table_ctx*) /data/src/10.7/sql/sql_table.cc:7446:20

    #21 0x11e3bdd in mysql_alter_table(THD*, st_mysql_const_lex_string const*, st_mysql_const_lex_string const*, HA_CREATE_INFO*, TABLE_LIST*, Alter_info*, unsigned int, st_order*, bool, bool) /data/src/10.7/sql/sql_table.cc:10342:16

    #22 0x145da1f in Sql_cmd_alter_table::execute(THD*) /data/src/10.7/sql/sql_alter.cc:544:11

    #23 0xe46743 in mysql_execute_command(THD*, bool) /data/src/10.7/sql/sql_parse.cc:5988:26

    #24 0xe17a62 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /data/src/10.7/sql/sql_parse.cc:8027:18

    #25 0xe107e4 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /data/src/10.7/sql/sql_parse.cc:1894:7

    #26 0xe1a749 in do_command(THD*, bool) /data/src/10.7/sql/sql_parse.cc:1402:17

    #27 0x1436f99 in do_handle_one_connection(CONNECT*, bool) /data/src/10.7/sql/sql_connect.cc:1418:11

    #28 0x14365e3 in handle_one_connection /data/src/10.7/sql/sql_connect.cc:1312:5

    #29 0x24e9777 in pfs_spawn_thread /data/src/10.7/storage/perfschema/pfs.cc:2201:3

SUMMARY: AddressSanitizer: 48 byte(s) leaked in 1 allocation(s).

220109 18:16:36 [ERROR] mysqld got signal 6 ;

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: 10.7.2-MariaDB-debug-log

read_buffer_size=131072

max_used_connections=2

thread_count=0

Thread pointer: 0x0

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 = 0x0 thread_stack 0x100000

??:0(__interceptor_backtrace)[0x88457b]

mysys/stacktrace.c:212(my_print_stacktrace)[0x351ff49]

sql/signal_handler.cc:226(handle_fatal_signal)[0x19b5df9]

sigaction.c:0(__restore_rt)[0x7fae82c10140]

linux/raise.c:51(__GI_raise)[0x7fae82878ce1]

stdlib/abort.c:81(__GI_abort)[0x7fae82862537]

:0(__sanitizer::Abort())[0x8e51e7]

:0(__sanitizer::Die())[0x8e3b61]

:0(__lsan::HandleLeaks())[0x8f0cf8]

:0(__lsan::DoLeakCheck())[0x8ee461]

stdlib/exit.c:109(__run_exit_handlers)[0x7fae8287b4d7]

:0(__GI_exit)[0x7fae8287b67a]

addr2line: DWARF error: could not find variable specification at offset 1ed1d

mysqld.cc:0(mysqld_exit(int))[0x8fd2aa]

sql/mysqld.cc:5905(mysqld_main(int, char**))[0x904c55]

sql/main.cc:34(main)[0x8f9a92]

csu/libc-start.c:308(__libc_start_main)[0x7fae82863d0a]

??:0(_start)[0x84d47a]

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 /dev/shm/var_auto_Qa30/mysqld.1/data

Resource Limits:

Fatal signal 11 while backtracing

worker[1] Using MTR_BUILD_THREAD 300, with reserved ports 16000..16019

gcol.virtual_index_drop 'innodb'         [ pass ]     70

innodb.alter_copy 'innodb'               [ pass ]  14181

--------------------------------------------------------------------------

The servers were restarted 0 times

Spent 14.251 of 17 seconds executing testcases

Completed: All 2 tests were successful.