I preach to everyone to fail as loudly as possible and as fast as possible. Don't try to "fix" unknown errors in code. It often catches fresh graduates off guard. If you fail very loud and fast most issues will be found asap and fixed.

I had to help out a team in the cleanup of a bug that corrupted some data silently for a while before being found. It was too long out to roll back and they needed all help to identify what was real or wrong data.