From 9cce9ff81be0a229569456b9a824663291cfad08 Mon Sep 17 00:00:00 2001
From: Wez Furlong <wez@wezfurlong.org>
Date: Wed, 3 Aug 2022 21:34:12 -0700
Subject: [PATCH] fix potential panic when computing hyperlink rules

refs: https://github.com/wez/wezterm/issues/2355
---
 termwiz/src/surface/line/line.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/termwiz/src/surface/line/line.rs b/termwiz/src/surface/line/line.rs
index 87c929aa0..9959a4cda 100644
--- a/termwiz/src/surface/line/line.rs
+++ b/termwiz/src/surface/line/line.rs
@@ -499,6 +499,10 @@ impl Line {
 
     pub fn split_off(&mut self, idx: usize, seqno: SequenceNo) -> Self {
         let my_cells = self.coerce_vec_storage();
+        // Clamp to avoid out of bounds panic if the line is shorter
+        // than the requested split point
+        // <https://github.com/wez/wezterm/issues/2355>
+        let idx = idx.min(my_cells.len());
         let cells = my_cells.split_off(idx);
         Self {
             bits: self.bits,