Problematic tests list (62 rows):

bugs.core_0883_test | The built-in BLR printer doesn't support all FB2 features
bugs.core_1152_test | Cannot erase a table with check constraints referencing more than a single columns
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_4337_test | gfix -sweep makes "reconnect" when it is removed from mon$attachments by delete command (issued in another window)
bugs.core_4731_test | Prohibit an ability to issue DML or DDL statements on RDB$ tables (CORE-4731)
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_4880_test | Better performance of creating packages containing many functions
bugs.core_4937_test | View/subselect with "union" does not use computed index
bugs.core_5383_test | Dependencies in Package not recognised
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_5737_test | Invalid parameters of gds transaction in ISQL
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_6166_test | Problems with long object names (> 255 bytes)
bugs.core_6300_test | Next attachment id, next statement id and some other additions [CORE-6300]
bugs.core_6444_test | Ability to query Firebird configuration using SQL
bugs.gh_0310_test | System table with keywords
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_7141_test | Services manager breaks long lines into 1023 bytes portions when using isc_info_svc_line in Service::query()
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_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_8661_test | Strange output from SHOW DEPENDENCIES command on 6.0
bugs.gh_8663_test | Problem with restore time when DB has many indices (possible regression in 6.x)
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.blob.test_blob_over_4gb | Check ability to operate with blob with size greater than 4Gb
functional.gtcs.test_computed_fields_13 | Computed fields
functional.gtcs.test_misplaced_collation_in_extracted_metadata | Misplaced collation when extracting metadata with isql
functional.gtcs.test_returning_01 | Test of RETURNING clause: INSERT, UPDATE, MERGE.
functional.replication.test_ddl_triggers_must_not_fire_on_replica | DDL-triggers must fire only on master DB
functional.replication.test_disallow_rdb_backup_history_replication | Disallow replication of RDB$BACKUP_HISTORY
functional.replication.test_duplicates_in_rw_replica_after_conflicting_insert | Conflicting INSERT propagated into a read-write replica may cause duplicate records to appear
functional.replication.test_failed_ddl_commands_can_be_replicated | Failed DDL commands can be replicated
functional.replication.test_generator_could_not_be_transferred_to_replica | Generator values may not replicate after commit
functional.replication.test_invalid_msg_if_target_db_has_no_replica_flag | Invalid message in replication.log (and possibly crash in the case of synchronous replication) when the target DB has no its "replica" flag set
functional.replication.test_lookup_problems_for_intl_data_in_unique_indices | Lookup problems for INTL strings in unique indices
functional.replication.test_make_async_reinit_reliable | Make asynchronous replica re-initialization reliable #8324
functional.replication.test_shutdown_during_applying_segments_leads_to_crash | Crash or hang while shutting down the replica database if segments are being applied
functional.replication.test_some_updates_crash_server_on_replica_side | Some updates can crash Firebird server on replica side
functional.replication.test_sync_replica_allow_spaces_in_username_or_password | Leading, trailing or inner space character specified in 'sync_replica' must not cause error
functional.replication.test_sync_replica_server_hangs_on_disconnect | Synchronous replication hangs on disconnect [CORE6497]
functional.replication.test_uk_violation_in_rw_repl_if_constraint_name_is_used | PK/UK violation error raises in RW replica if constraint name is used to check uniqueness instead of index name
functional.replication.test_updating_blob_with_empty_string_stops_replication | Replication gets stuck due to "Blob xxx.xx is not found for table xxx" error

This list is the same for:

6.0.0.1948 2026.05.13 f8eee951 | SS