From 6dde8e3ceac21f2940cb5dfc9a9734a77faec6de Mon Sep 17 00:00:00 2001
From: MikiraSora <mikirasora0409@126.com>
Date: Wed, 15 Jan 2025 13:59:59 +0800
Subject: [PATCH] fix crash

---
 .../Graphics/Drawing/TargetImpl/VisibleLineVerticesQuery.cs    | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/OngekiFumenEditor/Modules/FumenVisualEditor/Graphics/Drawing/TargetImpl/VisibleLineVerticesQuery.cs b/OngekiFumenEditor/Modules/FumenVisualEditor/Graphics/Drawing/TargetImpl/VisibleLineVerticesQuery.cs
index 47250c2d..4a59ddf4 100644
--- a/OngekiFumenEditor/Modules/FumenVisualEditor/Graphics/Drawing/TargetImpl/VisibleLineVerticesQuery.cs
+++ b/OngekiFumenEditor/Modules/FumenVisualEditor/Graphics/Drawing/TargetImpl/VisibleLineVerticesQuery.cs
@@ -82,7 +82,8 @@ void CheckIfSoflanChanged2(double totalTGrid, bool isVailed)
                     if (diff < 0)
                     {
                         var xGrid = start.CalulateXGrid(checkTGrid);
-                        PostPoint(checkTGrid, xGrid, isVailed);
+                        if (xGrid is not null)
+                            PostPoint(checkTGrid, xGrid, isVailed);
                     }
 
                     affectedSoflanPoints.RemoveAt(affectedSoflanPoints.Count - 1);