Problematic tests list (54 rows):
bugs.core_2140_test  Error messages after parameters substitution contains '\n' characters instead of line break
bugs.core_2712_test  Do not print "invalid request BLR" for par.cpp errors with valid BLR
bugs.core_3188_test  page 0 is of wrong type (expected 6, found 1)
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
bugs.core_4819_test  EXECUTE PROCEDURE's RETURNING_VALUES and EXECUTE STATEMENT's INTO does not check validity of assignments targets leading to bugcheck
bugs.core_4923_test  Add ability to track domains rename in DDL triggers
bugs.core_4937_test  View/subselect with "union" does not use computed index
bugs.core_5074_test  Lost the charset ID in selection of array element
bugs.core_5161_test  Unique index could be created on non-unique data
bugs.core_5275_test  Expression index may become inconsistent if CREATE INDEX was interrupted after b-tree creation but before commiting
bugs.core_5410_test  Dependencies are not stored when using some type of contructions in subroutines
bugs.core_5481_test  Available indices are not used in some cases if ORDER BY expression is a filtered one
bugs.core_5488_session_idle_test  Timeouts for running SQL statements and idle connections
bugs.core_5606_test  Add expression index name to exception message if computation failed
bugs.core_5908_test  Enhance dynamic libraries loading related error messages
bugs.core_5921_test  Provide information about Global Commit Number, Commit Number of currently used database snapshot (if any) and Commit Numbers assigned to the committed transactions
bugs.core_6095_test  Extend trace record for COMMIT/ROLLBACK RETAINING to allow chaining of transaction ids
bugs.core_6300_test  Next attachment id, next statement id and some other additions [CORE-6300]
bugs.core_6336_test  Regression in FB 4.x: error "Implementation of text subtype <NNNN> not located" on attempt to use some collations defined in fbintl.conf [CORE6336]
bugs.core_6444_test  Ability to query Firebird configuration using SQL
bugs.gh_0310_test  System table with keywords
bugs.gh_3812_test  Query with SP doesn't accept explicit plan [CORE3451]
bugs.gh_6802_test  When the statement timeout is set, it causes the lock manager to delay reporting deadlocks until timeout is expired
bugs.gh_6869_test  Domain CHECK-expression can be ignored when we DROP objects that are involved in it
bugs.gh_7050_test  Add table MON$COMPILED_STATEMENTS and columns
bugs.gh_7062_test  Creation of expression index does not release its statement correctly
bugs.gh_7220_test  Dependencies of subroutines are not preserved after backup restore
bugs.gh_7269_test  Database restore must make every effort on activating deferred indexes
bugs.gh_7398_test  Worst plan sort created to execute an indexed tables
bugs.gh_7426_test  Ensure the DDL trigger requests are cached
bugs.gh_7466_plans_tracking_test  Add COMPILE trace events - ability to see execution plan of every PSQL statement.
bugs.gh_7466_test  Add COMPILE trace events for procedures/functions/triggers
bugs.gh_7804_test  The partial index is not involved when filtering conditions through OR.
bugs.gh_7904_test  More realistic cardinality adjustments for unmatchable booleans // FB5 bad plan for query
bugs.gh_8077_test  Error "Too many recursion levels" does not stop execuition of code that uses ON DISCONNECT trigger (FB 4.x+)
bugs.gh_8161_test  Cardinality estimation should use primary record versions only
bugs.gh_8278_test  Avoid index lookup for a NULL key if the condition is known to always be FALSE in this case
bugs.gh_8488_test  MIN/MAX aggregates may badly affect the join order in queries with mixed INNER/LEFT joins
bugs.gh_8661_test  Strange output from SHOW DEPENDENCIES command on 6.0
bugs.gh_8851_test  'Internal error' when calling outer procedure after deleting unused result variable from inner procedure
bugs.gh_8946_test  PERCENTILE_CONT and PERCENTILE_DISC functions #2
functional.arno.optimizer.test_opt_inner_join_05  INNER JOIN join order LIKE and STARTING WITH
functional.basic.isql.test_06  Let ISQL show per-table run-time statistics.
functional.gtcs.test_computed_fields_13  Computed fields
functional.index.create.test_all_cases_basic  CREATE INDEX: check all cases
functional.replication.test_ddl_triggers_must_not_fire_on_replica  DDL-triggers must fire only on master DB
functional.sqlite.test_b5ca442af9  "Malformed database schema" when creating a failing index within a transaction
functional.table.alter.test_03  ALTER TABLE - ADD CONSTRAINT - PRIMARY KEY
functional.table.alter.test_04  ALTER TABLE - ADD CONSTRAINT - UNIQUE
functional.table.alter.test_05  ALTER TABLE - ALTER - TO
functional.trigger.alter.test_alter_dml_basic  ALTER TRIGGER - basic checks for DML triggers
functional.trigger.database.test_transactioncommit_01  Trigger on commit transaction. See also CORE-645

This list is the same for:
6.0.0.1902 2026.04.15 3c5a73c1  CS