Sig 11 in json_normalize_sort

--source include/have_innodb.inc

CREATE TABLE t (a JSON)Engine=InnoDB;

INSERT INTO t VALUES (CONCAT (REPEAT('{"v":',5000),'1',REPEAT('}',5000)));

SELECT JSON_EQUALS (a,a) FROM t;

Program terminated with signal SIGSEGV, Segmentation fault.

#0  0x0000624a37adbf52 in json_normalize_sort (val=0x781b2c791928) at /test/bb-12.1-json_depth_unlimited_dbg/strings/json_normalize.c:323

....so on similar lines

#3519 0x0000624a37adbfca in json_normalize_sort (val=0x781b2c0adc08) at /test/bb-12.1-json_depth_unlimited_dbg/strings/json_normalize.c:331

#3520 0x0000624a37adbfca in json_normalize_sort (val=0x781be00f3c60) at /test/bb-12.1-json_depth_unlimited_dbg/strings/json_normalize.c:331

#3521 0x0000624a37adbd6a in json_normalize (result=0x781be00f3e28, s=0x781b2c068e98 "{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":{\"v\":"..., size=30001, cs=0x624a388df458 <my_charset_utf8mb4_bin>, current_mem_root=0x781b2c006e20, temp_je=0x781b2c0175a0, stack=0x781b2c017658) at /test/bb-12.1-json_depth_unlimited_dbg/strings/json_normalize.c:849

#3522 0x0000624a36f4b3c5 in Item_func_json_equals::val_bool (this=0x781b2c017378) at /test/bb-12.1-json_depth_unlimited_dbg/sql/item_jsonfunc.cc:712

#3523 0x0000624a36b6f7e2 in Item_bool_func::val_int (this=0x781b2c017378) at /test/bb-12.1-json_depth_unlimited_dbg/sql/item_cmpfunc.h:245

#3524 0x0000624a36fc15b5 in Type_handler::Item_send_long (this=0x624a3893c948 <type_handler_bool>, item=0x781b2c017378, protocol=0x781b2c001430, buf=0x781be00f4020) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_type.cc:7745

#3525 0x0000624a36fd5e2d in Type_handler_long::Item_send (this=0x624a3893c948 <type_handler_bool>, item=0x781b2c017378, protocol=0x781b2c001430, buf=0x781be00f4020) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_type.h:6086

#3526 0x0000624a36b348cd in Item::send (this=0x781b2c017378, protocol=0x781b2c001430, buffer=0x781be00f4020) at /test/bb-12.1-json_depth_unlimited_dbg/sql/item.h:1212

#3527 0x0000624a36b82b22 in Protocol::send_result_set_row (this=0x781b2c001430, row_items=0x781b2c016ec0) at /test/bb-12.1-json_depth_unlimited_dbg/sql/protocol.cc:1359

#3528 0x0000624a36c42e6e in select_send::send_data (this=0x781b2c018798, items=...) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_class.cc:3347

#3529 0x0000624a36c42b00 in select_result_sink::send_data_with_check (this=0x781b2c018798, items=..., u=0x781b2c005150, sent=0) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_class.cc:3245

#3530 0x0000624a36d6652d in end_send (join=0x781b2c0187c0, join_tab=0x781b2c01a670, end_of_records=false) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:25795

#3531 0x0000624a36d921fd in evaluate_join_record (join=0x781b2c0187c0, join_tab=0x781b2c01a1f8, error=0) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:24675

#3532 0x0000624a36d45a2e in sub_select (join=0x781b2c0187c0, join_tab=0x781b2c01a1f8, end_of_records=false) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:24442

#3533 0x0000624a36d6cfb5 in do_select (join=0x781b2c0187c0, procedure=0x0) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:23953

#3534 0x0000624a36d6c361 in JOIN::exec_inner (this=0x781b2c0187c0) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:5068

#3535 0x0000624a36d6b55e in JOIN::exec (this=0x781b2c0187c0) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:4856

#3536 0x0000624a36d4635d in mysql_select (thd=0x781b2c000d58, tables=0x781b2c017720, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2164525824, result=0x781b2c018798, unit=0x781b2c005150, select_lex=0x781b2c016c08) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:5384

#3537 0x0000624a36d45de5 in handle_select (thd=0x781b2c000d58, lex=0x781b2c005070, result=0x781b2c018798, setup_tables_done_option=0) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:634

#3538 0x0000624a36cedb01 in execute_sqlcom_select (thd=0x781b2c000d58, all_tables=0x781b2c017720) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:6166

#3539 0x0000624a36ce294e in mysql_execute_command (thd=0x781b2c000d58, is_called_from_prepared_stmt=false) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:3954

#3540 0x0000624a36cdabf4 in mysql_parse (thd=0x781b2c000d58, rawbuf=0x781b2c016b70 "SELECT JSON_EQUALS (a,a) FROM t", length=31, parser_state=0x781be00f6a10) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:7882

#3541 0x0000624a36cd7fc8 in dispatch_command (command=COM_QUERY, thd=0x781b2c000d58, packet=0x781b2c1c93b9 "", packet_length=31, blocking=true) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:1877

#3542 0x0000624a36cdb7a3 in do_command (thd=0x781b2c000d58, blocking=true) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:1416

#3543 0x0000624a36ec7439 in do_handle_one_connection (connect=0x624a6fc44fd8, put_in_cache=true) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_connect.cc:1414

#3544 0x0000624a36ec71de in handle_one_connection (arg=0x624a6fc9a2a8) at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_connect.cc:1326

#3545 0x0000781be1e9caa4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447

#3546 0x0000781be1f29c3c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78