Assertion `strlen(Ptr) == str_length' failed

SET SESSION sql_buffer_result=1;

CREATE TABLE t (a JSON);

ALTER TABLE t CONVERT TO CHARACTER SET ucs2 COLLATE ucs2_czech_ci;

INSERT INTO t SELECT '[1,[2,[3,[4,[5,[6,[7,[8,[9,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1,[1]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]' FROM seq_1_to_1;

SELECT JSON_DETAILED (a) FROM t;

SELECT JSON_DETAILED (a) FROM t;

mariadbd: /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_string.h:362: void Binary_string::chop(): Assertion `strlen(Ptr) == str_length' failed.

Core was generated by `/test/bb-12.1-json_depth_unlimited_MD250625-mariadb-12.1.0-linux-x86_64-dbg/bin'.

Program terminated with signal SIGABRT, Aborted.

#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>)at ./nptl/pthread_kill.c:44

[Current thread is 1 (LWP 3337873)]

(gdb) bt

#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>)at ./nptl/pthread_kill.c:44

#1  __pthread_kill_internal (signo=6, threadid=<optimized out>)at ./nptl/pthread_kill.c:78

#2  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6)at ./nptl/pthread_kill.c:89

#3  0x00007606f644527e in __GI_raise (sig=sig@entry=6)at ../sysdeps/posix/raise.c:26

#4  0x00007606f64288ff in __GI_abort () at ./stdlib/abort.c:79

#5  0x00007606f642881b in __assert_fail_base (fmt=0x7606f65d01e8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x5bdf058adc4f "strlen(Ptr) == str_length", file=file@entry=0x5bdf058ab1f0 "/test/bb-12.1-json_depth_unlimited_dbg/sql/sql_string.h", line=line@entry=362, function=function@entry=0x5bdf058adc69 "void Binary_string::chop()")at ./assert/assert.c:96

#6  0x00007606f643b517 in __assert_fail (assertion=0x5bdf058adc4f "strlen(Ptr) == str_length", file=0x5bdf058ab1f0 "/test/bb-12.1-json_depth_unlimited_dbg/sql/sql_string.h", line=362, function=0x5bdf058adc69 "void Binary_string::chop()")at ./assert/assert.c:105

#7  0x00005bdf0471848e in Binary_string::chop (this=0x7605cc01a608)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_string.h:362

#8  0x00005bdf04ad8279 in json_nice (je=0x7605cc01a6b0, nice_js=0x7605cc01a600, mode=Item_func_json_format::DETAILED, tab_size=4)at /test/bb-12.1-json_depth_unlimited_dbg/sql/item_jsonfunc.cc:454

#9  0x00005bdf04ae3557 in Item_func_json_format::val_str (this=0x7605cc01a5d8, str=0x7605cc01a600)at /test/bb-12.1-json_depth_unlimited_dbg/sql/item_jsonfunc.cc:4659

#10 0x00005bdf04cd1a1c in Item::save_str_in_field (this=0x7605cc01a5d8, field=0x7605cc0f26b8, no_conversions=true)at /test/bb-12.1-json_depth_unlimited_dbg/sql/item.cc:7158

#11 0x00005bdf04b41810 in Type_handler_string_result::Item_save_in_field (this=0x5bdf064c6ed8 <type_handler_long_blob_json>, item=0x7605cc01a5d8, field=0x7605cc0f26b8, no_conversions=true)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_type.cc:4431

#12 0x00005bdf04cd1ec5 in Item::save_in_field (this=0x7605cc01a5d8, field=0x7605cc0f26b8, no_conversions=true)at /test/bb-12.1-json_depth_unlimited_dbg/sql/item.cc:7216

#13 0x00005bdf046f9a1e in Item_result_field::save_in_result_field (this=0x7605cc01a5d8, no_conversions=true)at /test/bb-12.1-json_depth_unlimited_dbg/sql/item.h:3611

#14 0x00005bdf0491e4c8 in copy_funcs (func_ptr=0x7605cc0f2390, thd=0x7605cc000d58)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:30073

#15 0x00005bdf0491af6b in end_write (join=0x7605cc01b890, join_tab=0x7605cc01d4f0, end_of_records=false)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:26064

#16 0x00005bdf04927afa in AGGR_OP::put_record (this=0x7605cc01e358, end_of_records=false)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:33564

#17 0x00005bdf04939327 in AGGR_OP::put_record (this=0x7605cc01e358)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.h:1204

#18 0x00005bdf048f1319 in sub_select_postjoin_aggr (join=0x7605cc01b890, join_tab=0x7605cc01d4f0, end_of_records=false)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:24126

#19 0x00005bdf0491c1fd in evaluate_join_record (join=0x7605cc01b890, join_tab=0x7605cc01d078, error=0)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:24675

#20 0x00005bdf048cfa2e in sub_select (join=0x7605cc01b890, join_tab=0x7605cc01d078, end_of_records=false)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:24442

#21 0x00005bdf048f6fb5 in do_select (join=0x7605cc01b890, procedure=0x0)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:23953

#22 0x00005bdf048f6361 in JOIN::exec_inner (this=0x7605cc01b890)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:5068

#23 0x00005bdf048f555e in JOIN::exec (this=0x7605cc01b890)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:4856

#24 0x00005bdf048d035d in mysql_select (thd=0x7605cc000d58, tables=0x7605cc01a7f0, fields=@0x7605cc01a240: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x7605cc01a768, last = 0x7605cc01a768, elements = 1}, <No data fields>}, conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2164656896, result=0x7605cc01b868, unit=0x7605cc005150, select_lex=0x7605cc019f88)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:5384

#25 0x00005bdf048cfde5 in handle_select (thd=0x7605cc000d58, lex=0x7605cc005070, result=0x7605cc01b868, setup_tables_done_option=0)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_select.cc:634

#26 0x00005bdf04877b01 in execute_sqlcom_select (thd=0x7605cc000d58, all_tables=0x7605cc01a7f0)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:6166

#27 0x00005bdf0486c94e in mysql_execute_command (thd=0x7605cc000d58, is_called_from_prepared_stmt=false)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:3954

#28 0x00005bdf04864bf4 in mysql_parse (thd=0x7605cc000d58, rawbuf=0x7605cc019ef0 "SELECT JSON_DETAILED (a) FROM t", length=31, parser_state=0x7606d02b1a10)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:7882

#29 0x00005bdf04861fc8 in dispatch_command (command=COM_QUERY, thd=0x7605cc000d58, packet=0x7605cc00b269 "", packet_length=31, blocking=true)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:1877

#30 0x00005bdf048657a3 in do_command (thd=0x7605cc000d58, blocking=true)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_parse.cc:1416

#31 0x00005bdf04a51439 in do_handle_one_connection (connect=0x5bdf1ff1e178, put_in_cache=true)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_connect.cc:1414

#32 0x00005bdf04a511de in handle_one_connection (arg=0x5bdf1ffdeb18)at /test/bb-12.1-json_depth_unlimited_dbg/sql/sql_connect.cc:1326

#33 0x00007606f649caa4 in start_thread (arg=<optimized out>)at ./nptl/pthread_create.c:447

#34 0x00007606f6529c3c in clone3 ()at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78