Q164000: FIX: C1001 Compiler File MAIN.C Line 413

Article: Q164000
Product(s): Microsoft C Compiler
Version(s): winnt:4.2
Operating System(s): 
Keyword(s): kbcode kbCompiler kbCPPonly kbLangCPP kbVC kbVC500fix kbHWx86
Last Modified: 04-AUG-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 Enterprise Edition, version 4.2 
   - Microsoft Visual C++, 32-bit Professional Edition, version 4.2 
-------------------------------------------------------------------------------

SYMPTOMS
========

Calling typeid with a temporary object causes the following error:

  fatal error C1001: INTERNAL COMPILER ERROR (compiler file
  'd:\backend\src\P2\main.c', line 413)

  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
==========

Instead of calling typeid with a temporary object, create a stack object and
then call typeid, referencing the stack object.

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: none
     */ 

     #include <typeinfo>

     struct X {
        X() {};
        ~X() {};
     };

     // This main function will cause the error.
     void main()
     {
         const type_info& t = typeid(X());
     }

     // For the workaround, replace main above with the following:
     void main()
     {
         X y;
         const type_info& t = typeid(y);
     }

Additional query words: kbVC420bug kbDSupport typeid RTTI

======================================================================
Keywords          : kbcode kbCompiler kbCPPonly kbLangCPP kbVC kbVC500fix kbHWx86 
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : winnt:4.2
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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