Subject: bug#58158: 29.0.50; [overlay] Interval tree iteration considered harmful

From: Stefan Monnier <[email-masked]>
Date: Fri, 30 Sep 2022 14:29:59 -0400

> Info for Stefan: I've now removed the per-tree null node, and make check
> shows no unexpected results.

Thanks.  It's an improvement, but I still don't understand how it
works :-(

        Stefan