output: #fixed code
                                  public void testToArray() throws SQLException {
  
          Object[] a = null;
          assertTrue(this.rs.next());
          a = processor.toArray(this.rs);
          assertEquals(COLS, a.length);
          assertEquals("1", a[0]);
          assertEquals("2", a[1]);
          assertEquals("3", a[2]);
              
          assertTrue(this.rs.next());
          a = processor.toArray(this.rs);
          assertEquals(COLS, a.length);
  
          assertEquals("4", a[0]);
          assertEquals("5", a[1]);
          assertEquals("6", a[2]);
              
          assertFalse(this.rs.next());
      }
input: #vulnerable code 
                                  public void testToArray() throws SQLException {
  
          int rowCount = 0;
          Object[] a = null;
          while (this.rs.next()) {
              a = processor.toArray(this.rs);
              assertEquals(COLS, a.length);
              rowCount++;
          }
  
          assertEquals(ROWS, rowCount);
          assertEquals("4", a[0]);
          assertEquals("5", a[1]);
          assertEquals("6", a[2]);
      } 
                              #location 12 
                              #vulnerability type NULL_DEREFERENCE