Cancelling an ADD operation late enough destroys paper and simulation.

[Ammoniacres]

Testmerges

N/A

Round ID

No response

Description of the bug

Cancelling an ADD operation (adding property from reference to target) right before the operation lets you pick recipe options causes the reference paper to be destroyed and the target not to produce a new simulation paper.

What's the difference with what should have happened?

The operation should have cancelled cleanly and returned two usable papers.

How do we reproduce this bug?

1. ADD a property from reference to target.
2. Wait until the machine is about to give you options for recipe ingredients.
3. Cancel.
   ...

Issue Bingo

• Issue could be reproduced at least once
• Issue happened in a recent (less than 7 days ago) round
• Couldn't find an existing issue about this (https://github.com/cmss13-devs/cmss13/issues)