when -r option is used (reverse) and when the feed is empty, rsstail
segfaults

   rsstail -u 'https://hnrss.org/bestcomments' -r
   zsh: segmentation fault  rsstail -u 'https://hnrss.org/bestcomments' -r

this only happens when the feed is empty. The above example works most
of the time, but sometimes happens to be empty and rsstail than always
segfaults

here is the saved empty feed that triggers the segfault:

<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hacker News:
Best
Comments</title><link>https://news.ycombinator.com/bestcomments</link><description>Hacker
News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss
v2.1.1</generator><lastBuildDate>Thu, 02 Nov 2023 10:13:33
+0000</lastBuildDate><atom:link href="https://hnrss.org/bestcomments"
rel="self" type="application/rss+xml"></atom:link></channel></rss>