Comment 4 for bug 435547

I had a use case for weakrefs within the same database, and discovered the issue while trying to figure out how they worked. In fact, the same hobby project where I also discovered issue185066 and issue428039. Unfortunately that code died with my old hard drive about two months ago, so I can't look up what it was right now. I hope to get back to it some day, both because the project was algorithmically interesting, and because it was a good way for me to learn about all the dark corners of the ZODB. Catching and helping to fix a bug or two along the way was a bonus. :)