Instructions

We are now going to show you the code changes to review. The old version of the code is on the left, the new version is on the right.

For the scientific validity of this experiment, it is vital that the review task is taken very seriously.

• Like in real life, you should find as many defects as possible and you should spend as little time as possible on the review.
• Unlike in real life, we are not interested in maintainability or design issues, but only in correctness issues ("bugs").

For example, a remark like the following is beyond the goal of the review: "Create a new class which is implemented by runnable interface that we can access multiple times." Instead, what we are interested in are the defects that make the code not work as intended under all circumstances.

Please assume that the code compiles and that the tests pass.

You will see that a previous reviewer already put a comment in line {{comment_line_number + 1}}. You are now asked to continue with your review.

To add a review remark, click on the corresponding line number. To delete a review mark, click on it again and delete the remark's text.