Subject: bug#42437: 26.3; calc-dots creates interval form starting with -inf

From: Mattias Engdegård <[email-masked]>
Date: Mon, 20 Jul 2020 13:34:53 +0200

Hello Allen,

This looks very much like bug#39040, which has been fixed in Emacs 27 (not yet released).
If you don't mind building from source, maybe you could try that version?