SIGSEGV in flush_tables_with_read_lock on FLUSH TABLE

SET GLOBAL log_bin_trust_function_creators=ON;

CREATE FUNCTION f() RETURNS INT RETURN (SELECT 1 FROM t);

CREATE VIEW v AS SELECT f();

FLUSH TABLE v WITH READ LOCK;

Core was generated by `/test/MD160821-mariadb-10.7.0-linux-x86_64-dbg/bin/mysqld --no-defaults --core-'.

Program terminated with signal SIGSEGV, Segmentation fault.

#0  0x000055b31847b58d in flush_tables_with_read_lock (thd=thd@entry=

    0x150a94000db8, all_tables=<optimized out>)

    at /test/10.7_dbg/sql/sql_reload.cc:610

[Current thread is 1 (Thread 0x150ad8504700 (LWP 3707074))]

(gdb) bt

#0  0x000055b31847b58d in flush_tables_with_read_lock (thd=thd@entry=0x150a94000db8, all_tables=<optimized out>) at /test/10.7_dbg/sql/sql_reload.cc:610

#1  0x000055b3182d5606 in mysql_execute_command (thd=thd@entry=0x150a94000db8, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /test/10.7_dbg/sql/sql_parse.cc:5406

#2  0x000055b3182bdac3 in mysql_parse (thd=thd@entry=0x150a94000db8, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x150ad8503400) at /test/10.7_dbg/sql/sql_parse.cc:8030

#3  0x000055b3182cc6c8 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x150a94000db8, packet=packet@entry=0x150a9400b739 "FLUSH TABLE v WITH READ LOCK", packet_length=packet_length@entry=28, blocking=blocking@entry=true) at /test/10.7_dbg/sql/sql_class.h:1357

#4  0x000055b3182cfae9 in do_command (thd=0x150a94000db8, blocking=blocking@entry=true) at /test/10.7_dbg/sql/sql_parse.cc:1404

#5  0x000055b318445dd6 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x55b31b9243f8, put_in_cache=put_in_cache@entry=true) at /test/10.7_dbg/sql/sql_connect.cc:1418

#6  0x000055b3184463db in handle_one_connection (arg=arg@entry=0x55b31b9243f8) at /test/10.7_dbg/sql/sql_connect.cc:1312

#7  0x000055b3188aece4 in pfs_spawn_thread (arg=0x55b31b84d048) at /test/10.7_dbg/storage/perfschema/pfs.cc:2201

#8  0x0000150adc5d1609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#9  0x0000150adc1bf293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Core was generated by `/test/MD160821-mariadb-10.7.0-linux-x86_64-opt/bin/mysqld --no-defaults --core-'.

Program terminated with signal SIGSEGV, Segmentation fault.

#0  0x0000556609ebbe9b in flush_tables_with_read_lock (thd=thd@entry=

    0x149c84000c58, all_tables=<optimized out>)

    at /test/10.7_opt/sql/sql_reload.cc:610

[Current thread is 1 (Thread 0x149cd0483700 (LWP 3745301))]

(gdb) bt

#0  0x0000556609ebbe9b in flush_tables_with_read_lock (thd=thd@entry=0x149c84000c58, all_tables=<optimized out>) at /test/10.7_opt/sql/sql_reload.cc:610

#1  0x0000556609d87418 in mysql_execute_command (thd=0x149c84000c58, is_called_from_prepared_stmt=<optimized out>) at /test/10.7_opt/sql/sql_parse.cc:5406

#2  0x0000556609d74336 in mysql_parse (thd=0x149c84000c58, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at /test/10.7_opt/sql/sql_parse.cc:8030

#3  0x0000556609d80225 in dispatch_command (command=COM_QUERY, thd=0x149c84000c58, packet=<optimized out>, packet_length=<optimized out>, blocking=<optimized out>) at /test/10.7_opt/sql/sql_class.h:1357

#4  0x0000556609d82147 in do_command (thd=0x149c84000c58, blocking=blocking@entry=true) at /test/10.7_opt/sql/sql_parse.cc:1404

#5  0x0000556609e9d967 in do_handle_one_connection (connect=<optimized out>, put_in_cache=true) at /test/10.7_opt/sql/sql_connect.cc:1418

#6  0x0000556609e9dcad in handle_one_connection (arg=arg@entry=0x55660d3d6dd8) at /test/10.7_opt/sql/sql_connect.cc:1312

#7  0x000055660a1f0648 in pfs_spawn_thread (arg=0x55660d002c88) at /test/10.7_opt/storage/perfschema/pfs.cc:2201

#8  0x0000149cd1dbc609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#9  0x0000149cd19aa293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95