diff --git a/NETGenerator/NETGenerator.cs b/NETGenerator/NETGenerator.cs
index 085f2e977..1bf5d61ef 100644
--- a/NETGenerator/NETGenerator.cs
+++ b/NETGenerator/NETGenerator.cs
@@ -9846,9 +9846,15 @@ namespace PascalABCCompiler.NETGenerator
             is_addr = tmp_is_addr;
             il.Emit(OpCodes.Brfalse, FalseLabel);
             value.ret_if_true.visit(this);
+            var ti = helper.GetTypeReference(value.ret_if_true.type);
+            if (ti != null)
+                EmitBox(value.ret_if_true, ti.tp);
             il.Emit(OpCodes.Br, EndLabel);
             il.MarkLabel(FalseLabel);
             value.ret_if_false.visit(this);
+            ti = helper.GetTypeReference(value.ret_if_false.type);
+            if (ti != null)
+                EmitBox(value.ret_if_false, ti.tp);
             il.MarkLabel(EndLabel);
             
         }
diff --git a/TestSuite/power1.pas b/TestSuite/power1.pas
index b5e2f6486..d541748a6 100644
--- a/TestSuite/power1.pas
+++ b/TestSuite/power1.pas
@@ -1,20 +1,21 @@
-const r = 3**2;
+const
+  r = 3 ** 2;
 
 begin
-  assert(round(2**3)=8);
-  assert(round(3 * 2**3)=24);
-  assert(round(2**3 * 3)=24);
-  assert(round(2.0**3)=8);
-  assert(round(2**3.0)=8);
-  assert(round(-2**2)=4);
-  assert(round(-(2**2))=-4);
+  assert(round(2 ** 3) = 8);
+  assert(round(3 * 2 ** 3) = 24);
+  assert(round(2 ** 3 * 3) = 24);
+  assert(round(2.0 ** 3) = 8);
+  assert(round(2 ** 3.0) = 8);
+  assert(round(-2 ** 2) = 4);
+  assert(round(-(2 ** 2)) = -4);
   var b: byte := 2;
-  assert(round(b**2) = 4);
-  assert(abs(2**-2-0.25) < 0.0001);
-  var i := round(2**3);
+  assert(round(b ** 2) = 4);
+  assert(abs(2 ** -2 - 0.25) < 0.0001);
+  var i := round(2 ** 3);
   assert(i = 8);
   assert(round(r) = 9);
   var bi := new BigInteger(3);
-  assert(bi**2 = 9);
+  assert(bi ** 2 = 9);
   var bi2 := bi ** 2;
 end.
\ No newline at end of file
diff --git a/TestSuite/question3.pas b/TestSuite/question3.pas
new file mode 100644
index 000000000..b05b24e83
--- /dev/null
+++ b/TestSuite/question3.pas
@@ -0,0 +1,44 @@
+var i: integer;
+
+type
+  I1 = interface
+    
+    procedure p1;
+  
+  end;
+  R1 = record(I1)
+    
+    public procedure p1;
+    begin
+      Inc(i);
+    end;
+    
+    public constructor;
+    begin
+    end;
+  
+  end;
+  R2 = record(I1)
+    
+    public next1: I1;
+    public next2: I1;
+    
+    public procedure p1;
+    begin
+      next1.p1;
+      next2.p1;
+    end;
+    
+    public constructor(b:boolean);
+    begin
+      next1 := b? I1(new R2(false)) : I1(new R1);
+      next2 := b? I1(new R2(false)) : I1(new R1);
+    end;
+  
+  end;
+
+begin
+  var a := new R2(true);
+  a.p1;
+  assert(i = 4);
+end.
\ No newline at end of file
diff --git a/TestSuite/question4.pas b/TestSuite/question4.pas
new file mode 100644
index 000000000..8d1357163
--- /dev/null
+++ b/TestSuite/question4.pas
@@ -0,0 +1,9 @@
+begin
+  var o: object;
+  var b := true;
+  o := b ? 1 : 2;
+  assert(integer(o) = 1);
+  b := false;
+  o := b ? 1 : 2;
+  assert(integer(o) = 2);
+end.
\ No newline at end of file
diff --git a/TreeConverter/TreeRealization/Expressions.cs b/TreeConverter/TreeRealization/Expressions.cs
index 84d3f2d5b..4c930f402 100644
--- a/TreeConverter/TreeRealization/Expressions.cs
+++ b/TreeConverter/TreeRealization/Expressions.cs
@@ -273,6 +273,10 @@ namespace PascalABCCompiler.TreeRealization
             this._condition = condition;
             this._ret_if_true = ret_if_true;
             this._ret_if_false = ret_if_false;
+            /*if (ret_if_true is null_const_node)
+                this.conversion_type = ret_if_false.conversion_type;
+            else
+                this.conversion_type = ret_if_true.conversion_type;*/
         }
 
         public expression_node internal_condition
diff --git a/bin/TestRunner.exe b/bin/TestRunner.exe
index abd3aa0aa..2decbf7b5 100644
Binary files a/bin/TestRunner.exe and b/bin/TestRunner.exe differ
diff --git a/bin/TestRunner.pas b/bin/TestRunner.pas
index 78948df56..83ee50dbe 100644
--- a/bin/TestRunner.pas
+++ b/bin/TestRunner.pas
@@ -1,4 +1,4 @@
-// Copyright (c) Ivan Bondarev, Stanislav Mihalkovich (for details please see \doc\copyright.txt)
+// Copyright (c) Ivan Bondarev, Stanislav Mihalkovich (for details please see \doc\copyright.txt)
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 {$reference Compiler.dll}
 {$reference CodeCompletion.dll}
@@ -60,6 +60,8 @@ begin
       if comp.ErrorsList[0].GetType() = typeof(PascalABCCompiler.Errors.CompilerInternalError) then
         System.Windows.Forms.MessageBox.Show('Compilation of '+files[i]+' failed'+System.Environment.NewLine+comp.ErrorsList[0].ToString());
     end;
+    if i mod 20 = 0 then
+      System.GC.Collect();
   end;
   
 end;
@@ -91,6 +93,8 @@ begin
       System.Windows.Forms.MessageBox.Show('Compilation of '+files[i]+' failed'+System.Environment.NewLine+comp.ErrorsList[0].ToString());
       Halt();
     end;
+    if i mod 20 = 0 then
+      System.GC.Collect();
   end;
   
 end;
@@ -121,6 +125,8 @@ begin
       System.Windows.Forms.MessageBox.Show('Compilation of '+files[i]+' failed'+System.Environment.NewLine+comp.ErrorsList[0].ToString());
       Halt();
     end;
+    if i mod 20 = 0 then
+      System.GC.Collect();
   end;
   
 end;
@@ -149,7 +155,7 @@ begin
       Halt();
     end;
   end;
-  
+  System.GC.Collect;
 end;
 
 procedure CompileAllUsesUnits;
@@ -176,7 +182,7 @@ begin
       Halt();
     end;
   end;
-  
+  System.GC.Collect;
 end;
 
 procedure CopyPCUFiles;