[#MDEV-27415] main.json_normalize and main.json_equals fail with UBSAN runtime error

The tests only exist in 10.7+. I have no information whether the root cause affects earlier versions.

10.7 9f2a6bbe
main.json_equals [ fail ] Found warnings/errors in server log file!
Test ended at 2022-01-03 18:03:07
line
/data/src/10.7/strings/json_lib.c:844:25: runtime error: index 200 out of bounds for type 'json_string_char_classes [128]'
/data/src/10.7/strings/json_lib.c:844:25: runtime error: load of address 0x564204a58e20 with insufficient space for an object of type 'json_string_char_classes'
^ Found warnings in /mnt8t/bld/10.7-ubsan-nightly/mysql-test/var/log/mysqld.1.err
ok

/data/src/10.7/strings/json_lib.c:844:25: runtime error: index 200 out of bounds for type 'json_string_char_classes [128]'
/data/src/10.7/strings/json_lib.c:844:25: runtime error: load of address 0x55ffc5b46e20 with insufficient space for an object of type 'json_string_char_classes'
0x55ffc5b46e20: note: pointer points here
0c 00 00 00 0c 00 00 00 0c 00 00 00 0c 00 00 00 0c 00 00 00 0c 00 00 00 0c 00 00 00 0c 00 00 00
^

[MDEV-27415] main.json_normalize and main.json_equals fail with UBSAN runtime error Created: 2022-01-03 Updated: 2022-05-11 Resolved: 2022-05-11
Status:	Closed
Project:	MariaDB Server
Component/s:	JSON, Tests
Affects Version/s:	10.7
Fix Version/s:	10.7.5, 10.8.2