diff --git a/TestSuite/lambdas22.pas b/TestSuite/lambdas22.pas
new file mode 100644
index 000000000..78123da6b
--- /dev/null
+++ b/TestSuite/lambdas22.pas
@@ -0,0 +1,9 @@
+begin
+  var i := 0;
+  var p: Action0 := ()->begin i := 1 end;
+  var l := Lst&<Action0>();
+  l.Add(()->begin i := 2 end);
+  var l2 := l.ConvertAll(a->p);
+  l2[0]();
+  assert(i = 1);
+end.
\ No newline at end of file
diff --git a/TestSuite/libs/l2.pas b/TestSuite/libs/l2.pas
new file mode 100644
index 000000000..278e37548
--- /dev/null
+++ b/TestSuite/libs/l2.pas
@@ -0,0 +1,20 @@
+library l2;
+
+type
+  
+  t1 = class
+    
+    public function m1 := 0;
+    
+  end;
+  
+  t2 = class(t1)
+    public static i: integer;
+    public static procedure m1;
+    begin
+      i := 1;
+    end;
+    
+  end;
+  
+end.
\ No newline at end of file
diff --git a/TreeConverter/TreeRealization/generics.cs b/TreeConverter/TreeRealization/generics.cs
index 72923fb04..5b11e182b 100644
--- a/TreeConverter/TreeRealization/generics.cs
+++ b/TreeConverter/TreeRealization/generics.cs
@@ -589,6 +589,8 @@ namespace PascalABCCompiler.TreeRealization
 
         private static bool CheckIfTypeDependsOnUndeducedGenericParameters(type_node formalType, type_node[] deduced) //lroman
         {
+            if (formalType == null)
+                return false;
             if (formalType.generic_function_container != null)
             {
                 var par_num = formalType.generic_param_index;