Problematic tests list (66 rows):
bugs.core_1292_test  Can't create table using long username and UTF8 as attachment charset
bugs.core_3690_dialect_3_test  Wrong warning message for ambiguous query
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_4342_test  Non-privileged user can delete records from RDB$SECURITY_CLASSES table
bugs.core_4731_test  Prohibit an ability to issue DML or DDL statements on RDB$ tables (CORE-4731)
bugs.core_4743_test  Granted role does not work with non-ascii username
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_4937_test  View/subselect with "union" does not use computed index
bugs.core_5060_test  Cannot CREATE VIEW that selects from a system table, despite having all grants
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_5618_test  Part of the pages of the second level blobs is not released when deleting relations
bugs.core_5746_test  Remove the restriction on create/delete, enable/disable the user indexes in system tables
bugs.core_5754_test  ALTER TRIGGER check privilege for alter database instead of table
bugs.core_5756_addi_test  Regression: FB crashes when trying to recreate table that is in use by DML (3.0.3; 3.0.4; 4.0.0)
bugs.core_5840_test  Ignor of reference privilege
bugs.core_5861_test  GRANT OPTION is not checked for new object
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_6732_test  Stored procedure isn't able to execute statement 'GRANT'
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_6934_test  SQL SECURITY DEFINER does not affect the ownership of created DDL objects
bugs.gh_6935_test  SQL SECURITY DEFINER has inconsistent behaviour if the object owner is non-privileged
bugs.gh_6963_test  grant references not working
bugs.gh_7050_test  Add table MON$COMPILED_STATEMENTS and columns
bugs.gh_7217_test  user with DROP ANY PACKAGE privilege can not execute DROP PACKAGE BODY
bugs.gh_7220_test  Dependencies of subroutines are not preserved after backup restore
bugs.gh_7304_test  Events in system attachments (like garbage collector) are not traced
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_7744_test  Provide ability to run "ALTER SQL SECURITY DEFINER / INVOKER" without specifying further part of proc/func/package
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_8219_test  Database creation in 3.0.12, 4.0.5 and 5.0.1 slower than in previous releases
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_8386_test  Crash when creating index on table that uses UDR and ParallelWorkers > 1
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
functional.arno.optimizer.test_opt_inner_join_05  INNER JOIN join order LIKE and STARTING WITH
functional.basic.isql.test_02  ISQL - SHOW SYSTEM TABLES
functional.basic.isql.test_03  ISQL - SHOW SYSTEM parameters
functional.gtcs.test_computed_fields_13  Computed fields
functional.gtcs.test_returning_01  Test of RETURNING clause: INSERT, UPDATE, MERGE.
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.replication.test_missed_privilege_for_object_belonging_to_non_dba  Replication stops if GRANT issued by NON-DBA user who has RDB$ADMIN role and appropriate object (table, etc) belongs to another user
functional.syspriv.test_grant_revoke_any_ddl_right  Check ability to grant right for issuing CREATE/ALTER/DROP statements
functional.syspriv.test_grant_revoke_any_object  Check ability to query, modify and deleting data plus add/drop constraints on any table
functional.syspriv.test_use_granted_by_clause  Check ability to query, modify and deleting data plus add/drop constraints on any table
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:
6.0.0.1942 2026.05.11 7589a56a  SS