From 641e904074538ef985767e2397af07b78a169821 Mon Sep 17 00:00:00 2001
From: Noah Hellman <noah@hllmn.net>
Date: Thu, 26 Jan 2023 21:28:51 +0100
Subject: [PATCH] inline: disallow containers of zero length

---
 src/inline.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/inline.rs b/src/inline.rs
index 81e01ff..058a989 100644
--- a/src/inline.rs
+++ b/src/inline.rs
@@ -404,6 +404,10 @@ impl<I: Iterator<Item = char> + Clone> Parser<I> {
                     let (d, e) = self.openers[o];
                     let e_attr = e;
                     let e_opener = e + 1;
+                    if e_opener == self.events.len() - 1 {
+                        // empty container
+                        return None;
+                    }
                     let inner_span = Span::new(self.events[e_opener].span.end(), self.span.start());
                     let mut event_closer = match Container::try_from(d) {
                         Ok(cont) => {