Adding just deleted entries to RAR archive will lead to crash. It's tested on the latest master (13721e2a673a578ac955fb4f4be8e409668b3f84).

Steps to reproduce:

1. Create a new RAR archive.
2. Add any folder to it.
3. Delete the added folder.
4. Add it again. <-- Here it crashes

It doesn't matter if archive became empty after deleting the folder.
The bug seems to be present only for RAR archives, tested the same steps on 7-z - it's okay.