no message

tests/webtbs/tw3899.pp

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+{ Source provided for Free Pascal Bug Report 3899 }
+{ Submitted by "Stefan Glienke" on  2005-04-19 }
+{ e-mail: glienke@cpa.de }
+program project2;
+
+{$mode objfpc}{$H+}
+
+uses
+  Classes;
+  
+type
+  TZVariant = packed record
+    VInteger: Int64;
+  end;
+
+  IZInterface = IUnknown;
+
+  IZObject = interface(IZInterface)
+    ['{EF46E5F7-00CF-4DDA-BED0-057D6686AEE0}']
+    function Equals(const Value: IZInterface): Boolean;
+  end;
+
+  IZClonnable = interface(IZObject)
+    ['{ECB7F3A4-7B2E-4130-BA66-54A2D43C0149}']
+  end;
+
+  IZAnyValue = interface (IZClonnable)
+    ['{E81988B3-FD0E-4524-B658-B309B02F0B6A}']
+  end;
+  
+  TZAbstractObject = class(TInterfacedObject, IZObject)
+  public
+    function Equals(const Value: IZInterface): Boolean; virtual;
+  end;
+
+  TZAnyValue = class(TZAbstractObject, IZAnyValue)
+  private
+    FValue: TZVariant;
+  public
+    constructor Create(Value: TZVariant);
+    function Equals(const Value: IZInterface): Boolean; override;
+  end;
+
+constructor TZAnyValue.Create(Value: TZVariant);
+begin
+  FValue := Value;
+end;
+
+function TZAnyValue.Equals(const Value: IZInterface): Boolean;
+var
+  Temp: IZAnyValue;
+begin
+  if Value <> nil then
+  begin
+    if Value.QueryInterface(IZAnyValue, Temp) = 0 then
+    begin
+      Result := False;
+      Temp := nil;
+    end
+    else
+      Result := inherited Equals(Value);
+  end
+  else
+    Result := False;
+end;
+
+function TZAbstractObject.Equals(const Value: IZInterface): Boolean;
+begin
+  if Value <> nil then
+  begin
+    Result := (IZInterface(Self) = Value)
+      or ((Self as IZInterface) = (Value as IZInterface));
+  end
+  else
+    Result := False;
+end;
+
+
+var
+  ARecord: TZVariant;
+  AValue: IZAnyValue;
+
+begin
+  ARecord.VInteger := 42;
+  AValue := TZAnyValue.Create(ARecord);
+
+  AValue.Equals(AValue);
+  AValue.Equals(AValue); // <-- this call produces av
+
+end.