From ce7361269de136e17601e2daef48f2c507a5aec3 Mon Sep 17 00:00:00 2001
From: Yoshihiro Ito <yo.i.jewelry.bab@gmail.com>
Date: Sun, 12 Jan 2025 09:58:27 +0900
Subject: [PATCH] Fix NullReferenceException

---
 src/TextMateSharp/Model/TMModel.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/TextMateSharp/Model/TMModel.cs b/src/TextMateSharp/Model/TMModel.cs
index fc14ced..5550583 100644
--- a/src/TextMateSharp/Model/TMModel.cs
+++ b/src/TextMateSharp/Model/TMModel.cs
@@ -430,7 +430,11 @@ public bool IsLineInvalid(int lineIndex)
 
         public void InvalidateLine(int lineIndex)
         {
-            this._lines.Get(lineIndex).IsInvalid = true;
+            var line = this._lines.Get(lineIndex);
+            if (line == null)
+                return;
+
+            line.IsInvalid = true;
 
             lock (_lock)
             {