From 7f6265ecf3380dea4179f49a8cc8e5734b4df174 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bla=C5=BE=20Hrastnik?= <blaz@mxxn.io>
Date: Thu, 24 Jun 2021 01:38:02 +0900
Subject: [PATCH] fix: crash with ctrl-c on empty file

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

diff --git a/helix-core/src/comment.rs b/helix-core/src/comment.rs
index dff99babd..07f685d83 100644
--- a/helix-core/src/comment.rs
+++ b/helix-core/src/comment.rs
@@ -51,7 +51,7 @@ pub fn toggle_line_comments(doc: &Rope, selection: &Selection) -> Transaction {
         let lines = start..end + 1;
         let (commented, skipped, min) = find_line_comment(token, text, lines.clone());
 
-        changes.reserve(end - start - skipped.len());
+        changes.reserve((end - start).saturating_sub(skipped.len()));
 
         for line in lines {
             if skipped.contains(&line) {