From 72f62781f4b3be01e165bca29f6b277ac7a9fcce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20F=C3=A4rber?= <01mf02@gmail.com>
Date: Tue, 7 Nov 2023 15:00:01 +0100
Subject: [PATCH] Do not panic on empty input.

---
 src/source.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/source.rs b/src/source.rs
index 43982cb..45db40c 100644
--- a/src/source.rs
+++ b/src/source.rs
@@ -156,7 +156,7 @@ impl<I: AsRef<str>> Source<I> {
                 .lines
                 .binary_search_by_key(&offset, |line| line.offset)
                 .unwrap_or_else(|idx| idx.saturating_sub(1));
-            let line = self.lines[idx];
+            let line = self.line(idx)?;
             assert!(
                 offset >= line.offset,
                 "offset = {}, line.offset = {}",