Dear Maintainer, This bug has been corrected in version 4.7 as showed in the changelog
https://github.com/squid-cache/squid/blob/master/ChangeLog ð Bug 4796: comm.cc !isOpen(conn->fd) assertion when rotating logs I also have this problem with Buster package, and have successfully tested it corrected in SID package (4.8.1). Regards, O. Boursin
