* sqlite3: pass None for NULL authorizer args instead of crashing
CPython's authorizer callback receives NULL for arg1/arg2/db_name/access
when not applicable (e.g. SQLITE_READ on a table gives NULL for the
database name in some versions). Previously RustPython passed these
pointers to ptr_to_str which would crash or produce an error.
Now ptr_to_str_or_none is used: NULL pointers become Python None, which
matches CPython behavior and allows test_table_access and
test_column_access to pass.
Assisted-by: GitHub Copilot:claude-sonnet-4-6
* fix(sqlite3): avoid reentrant deadlock in Statement::new
sqlite3_prepare_v2 can synchronously invoke the authorizer callback,
which may call back into Connection methods (e.g. set_authorizer)
that require the same db lock. Holding db_lock across the prepare()
call caused a self-deadlock when a callback re-entered the connection.
Release the lock after sql_limit check and copy the raw handle before
calling prepare(), so FFI calls that can trigger Python re-entrancy
happen outside the lock scope.
Fixes hang in test_authorizer_concurrent_mutation_in_call
CPython 3.14 added check_num_params() which raises ProgrammingError when
narg/n_arg/num_params is out of range (-1..=SQLITE_LIMIT_FUNCTION_ARG).
RustPython passed invalid values directly to SQLite, resulting in an
OperationalError instead.
Add check_num_params() helper and call it in create_function(),
create_aggregate(), and create_window_function().
Assisted-by: GitHub Copilot:claude-sonnet-4-6
* Update sqlite3, dbm.sqlite3 and tests to CPython 3.14.2
* Add skip decorators for failing sqlite3 tests
Skip tests that fail due to unimplemented features or behavior differences:
- _iterdump not implemented (test_dump.py)
- Unraisable exception handling not implemented (test_hooks.py, test_userfunctions.py)
- Keyword-only arguments not supported for various methods
- Autocommit behavior differences (test_transactions.py)
- TransactionTests skipped due to timeout parameter type issue
- Various error message differences (test_dbapi.py)
- SQLITE_DBCONFIG constants not implemented
- Row and Connection signature inspection issues
All tests now pass with 95 skipped out of 493 total tests.
* Change @unittest.skip to @unittest.expectedFailure per code review
- Convert @unittest.skip decorators to @unittest.expectedFailure for tests that fail without panic/hang
- Keep @unittest.skip only for TransactionTests class (setUp fails with timeout=0 int type)
* fixup
Jiseok CHOI