Problematic tests list (72 rows):

bugs.core_1746_test | Expression index can be created while doing inserts into table
bugs.core_1894_test | Circular dependencies between computed fields crash the engine
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_3100_test | Wait mode and lock timeout of external transaction of EXECUTE STATEMENT not matched to corresponding parameters of local transaction
bugs.core_3188_test | page 0 is of wrong type (expected 6, found 1)
bugs.core_3450_test | Inefficient optimization (regression)
bugs.core_3610_test | Can insert DUPLICATE keys in UNIQUE index
bugs.core_3672_test | computed index by SUBSTRING function for long columns
bugs.core_3691_test | Missing constraint name in foreign key error message in FB 2.1.4
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_4386_test | Report more details for "object in use" errors
bugs.core_4754_test | Bugcheck 167 (invalid SEND request) while working with GTT from several attachments (using EXECUTE STATEMENT ... ON EXTERNAL and different roles)
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_4923_test | Add ability to track domains rename in DDL triggers
bugs.core_4933_test | Add better transaction control to isql
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_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_5756_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_5843_test | Wrong handling of failures of TRANSACTION START trigger
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_6252_test | UNIQUE / PRIMARY KEY constraint can be violated when AUTODDL = OFF and mixing commands for DDL and DML
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_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_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_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.blob.test_blob_over_4gb | Check ability to operate with blob with size greater than 4Gb
functional.blob.test_read_blob_in_multiple_cursors | Ability to read same blob_id using multiple cursors
functional.blob.test_small_blob_caching | Operations with inline streamed blobs when boundary values are used for seek() and read() methods.
functional.gtcs.test_computed_fields_13 | Computed fields
functional.index.create.test_all_cases_basic | CREATE INDEX: check all cases
functional.monitoring.test_04 | SYSDBA must see all attachments and their transactions, non-privileged user - only those which was of his login.
functional.replication.test_ddl_triggers_must_not_fire_on_replica | DDL-triggers must fire only on master DB
functional.session.test_alter_session_reset | Test results of ALTER SESSION RESET
functional.session.test_ext_conn_pool_01 | External Connections Pool, functionality test 01
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:

6.0.0.1886 2026.04.07 b137a213 | CS
6.0.0.1887 2026.04.09 2e189290 | CS