Q168430: FIX: Using Referenced Integer to Access Array Generates CXX0034

Article: Q168430
Product(s): Microsoft C Compiler
Version(s): 4.0,4.1,4.2,5.0,6.0
Operating System(s): 
Keyword(s): kberrmsg kbDebug kbide kbVC500bug kbVC600bug kbNoUpdate
Last Modified: 10-FEB-2002

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The information in this article applies to:

- The Integrated Debugger, used with:
   - Microsoft Visual C++, 32-bit Editions, versions 4.0, 4.1 
   - Microsoft Visual C++, 32-bit Enterprise Edition, versions 4.2, 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Professional Edition, versions 4.2, 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
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SYMPTOMS
========

The Visual C++ debugger generates the following error while using a referenced
integer to access array.

  Error: CXX0034: types incompatible with operator

The MORE INFORMATION section below contains a sample showing this behavior.

RESOLUTION
==========

The workaround is not to use referenced integer a[i] to access array as shown in
the sample. Use index value instead, as a[1].

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

This problem was corrected in Microsoft Visual C++ .NET.

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

Steps to Reproduce Behavior
---------------------------

Build the following sample with debug information:

     //test.cpp
     int func(int& i, int a[])
       {
        return 0;
       }

     int main(void)
       {
       int a[] = {1, 2, 3};
       int  i = 1;
       func(i, a);// SET A BREAKPOINT HERE
         return 0;
       }

Start the debugger with a breakpoint shown. If you now step into func() by
hitting the F11 key and put a watch on "a[i]," you will get the error mentioned
above. However, evaluating "i" and "a[1]" works just fine.

Additional query words:

======================================================================
Keywords          : kberrmsg kbDebug kbide kbVC500bug kbVC600bug kbNoUpdate 
Technology        : kbVCsearch kbAudDeveloper kbIntegratedDebugger
Version           : :4.0,4.1,4.2,5.0,6.0
Issue type        : kbbug
Solution Type     : kbfix

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