From e933bdef07ba39aca6c43fdf9554f364e2a2170f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=91=D0=BE=D0=BD=D0=B4=D0=B0=D1=80=D0=B5=D0=B2=20=D0=98?=
 =?UTF-8?q?=D0=B2=D0=B0=D0=BD?= <ibond84@googlemail.com>
Date: Sun, 13 Oct 2019 20:20:02 +0200
Subject: [PATCH] bug fix #2123

---
 Compiler/PCU/PCUReader.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Compiler/PCU/PCUReader.cs b/Compiler/PCU/PCUReader.cs
index 474a8dccb..b5dae0f75 100644
--- a/Compiler/PCU/PCUReader.cs
+++ b/Compiler/PCU/PCUReader.cs
@@ -740,7 +740,10 @@ namespace PascalABCCompiler.PCU
             if (template_types.Length > 0)
             {
                 if (!pure_template)
-                    t = t.MakeGenericType(template_types);
+                {
+                    if (t.IsGenericTypeDefinition)
+                        t = t.MakeGenericType(template_types);
+                }
                 else
                 {
                     ts.name = type_name.Remove(0, type_name.LastIndexOf('.') + 1);