LineBreakChangedがnullになっている可能性があった

diff --git a/Core/Document.cs b/Core/Document.cs
index 782a84b..f5a1b15 100644 (file)
--- a/Core/Document.cs
+++ b/Core/Document.cs
@@ -199,6 +199,7 @@ namespace FooEditEngine
             this.SelectionChanged += new EventHandler((s, e) => { });
             this.CaretChanged += (s, e) => { };
             this.AutoIndentHook += (s, e) => { };
+            this.LineBreakChanged += (s, e) => { };
         }
 
         void WacthDogPattern_Updated(object sender, EventArgs e)