проверка на сравнимость

Author: Mr-Rm

src/ScriptEngine/Machine/GenericIValueComparer.cs

@@ -5,6 +5,7 @@ This Source Code Form is subject to the terms of the
 at http://mozilla.org/MPL/2.0/.
 ----------------------------------------------------------*/
 
+using System;
 using System.Collections.Generic;
 using OneScript.Values;
 using ScriptEngine.Machine.Contexts;
@@ -42,7 +43,7 @@ public int Compare(IValue x, IValue y)
            if (ReferenceEquals(x, y))
                 return 0;
 
-            if (x.SystemType == y.SystemType)
+            if (x is IComparable && x.SystemType == y.SystemType )
                 return x.CompareTo(y);
             else
                 return x.ToString().CompareTo(y.ToString());