Q153398: FIX: Namespace and Typedef Cause C1001:’msc1.cpp’,line 1090

Article: Q153398
Product(s): Microsoft C Compiler
Version(s): 4.0 4.1 4.2
Operating System(s): 
Keyword(s): kbcode kbprogramming kbusage kbCompiler kbCPPonly kbLangCPP kbVC kbVC400bug kbVC410bug
Last Modified: 30-JUL-2001

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The information in this article applies to:

- The C/C++ Compiler (CL.EXE), included with:
   - Microsoft Visual C++, 32-bit Editions, versions 4.0, 4.1 
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 4.2 
   - Microsoft Visual C++, 32-bit Professional Edition, version 4.2 
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SYMPTOMS
========

A program that uses a namespace including a typedef name for the base class name
may cause the compiler to generate the following error message:

  fatal error C1001: INTERNAL COMPILER ERROR

In addition, this error will be followed by a message similar to this:

  

 (compiler file 'msc1.cpp', line 899)  <if using version 4.0>
 (compiler file 'msc1.cpp', line 1090) <if using version 4.1>
 (compiler file 'msc1.cpp', line 1089) <if using version 4.2>
 Please choose the Technical Support command on the Visual C++
 Help menu, or open the Technical Support help file for more information
 Error executing cl.exe.

RESOLUTION
==========

Avoid a typedef name for the base class within a different derived class
namespace.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This bug was corrected in Visual C++ version 5.0.

MORE INFORMATION
================

Sample Code
-----------

     /* Compile options needed:
     */ 
     //messages.cpp

     namespace X {
         class A{};
         typedef A B;
     }
     namespace Y{
         class C: public X::B{};
     //  Work around:  replace the above line with  the following:
     //  class C : public X::A{};

     }

Additional query words:

======================================================================
Keywords          : kbcode kbprogramming kbusage kbCompiler kbCPPonly kbLangCPP kbVC kbVC400bug kbVC410bug kbVC420bug kbVC500fix 
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : 4.0 4.1 4.2
Issue type        : kbbug
Solution Type     : kbfix

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