From a5d88b64ae85391bb62dda03270afb546c6ca5c6 Mon Sep 17 00:00:00 2001
From: Noah Hellman <noah@hllmn.net>
Date: Wed, 1 Feb 2023 18:05:25 +0100
Subject: [PATCH] parser: avoid panic

---
 src/span.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/span.rs b/src/span.rs
index 126f9b4..fab7709 100644
--- a/src/span.rs
+++ b/src/span.rs
@@ -236,8 +236,10 @@ impl<'s> InlineSpans<'s> {
                         return CowStr::Borrowed(&sp.of(src)[span.start() - a..span.end() - a]);
                     }
                     (span.start() - a)..sp.len()
-                } else {
+                } else if a <= span.end() {
                     0..sp.len().min(span.end() - a)
+                } else {
+                    break;
                 };
                 s.push_str(&sp.of(src)[r]);
             }