Problematic tests list (4 rows):

bugs.core_2140_test | Error messages after parameters substitution contains '\n' characters instead of line break
bugs.core_3610_test | Can insert DUPLICATE keys in UNIQUE index
bugs.core_4302_addi_test | Lookup (or scan) in descending index could be very inefficient for some keys
bugs.core_4302_test | Lookup (or scan) in descending index could be very inefficient for some keys

This list is the same for:

6.0.0.1902 2026.04.15 3c5a73c1 | SS