text: -- malloc.test
  -- 
  -- db eval {
  --     PRAGMA locking_mode = normal;
  --     BEGIN;
  --     CREATE TABLE t1(a PRIMARY KEY, b);
  --     INSERT INTO t1 VALUES(1, 'one');
  --     INSERT INTO t1 VALUES(2, 'two');
  --     INSERT INTO t1 VALUES(3, 'three');
  --     COMMIT;
  --     PRAGMA locking_mode = exclusive;
  -- }
  PRAGMA locking_mode = normal;
  BEGIN;
  CREATE TABLE t1(a PRIMARY KEY, b);
  INSERT INTO t1 VALUES(1, 'one');
  INSERT INTO t1 VALUES(2, 'two');
  INSERT INTO t1 VALUES(3, 'three');
  COMMIT;
  PRAGMA locking_mode = exclusive;