Article: Q177937
Product(s): Microsoft C Compiler
Version(s): 5.0,5.0sp1,5.0sp2,6.0
Operating System(s):
Keyword(s): 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 Enterprise Edition, versions 5.0, 5.0sp1, 5.0sp2, 6.0
- Microsoft Visual C++, 32-bit Professional Edition, versions 5.0, 5.0sp1, 5.0sp2, 6.0
- Microsoft Visual C++, 32-bit Learning Edition, version 6.0
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SYMPTOMS
========
Adding a function call in the Developer Studio debugger Watch window may result
in the following message if the function returns a struct or union with a field
width greater than 4 bytes:
Error: cannot display value
RESOLUTION
==========
There is no workaround for this problem.
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
================
The following procedure reproduces this problem:
1. Create a new console application project and add the following file to the
project:
/* File: TEST.CPP */
struct _XX
{
char m1;
char m2;
char m3;
char m4;
} XX;
struct _XX fun()
{
return XX;
}
int main()
{
fun();
return 0;
}
2. Build the project.
3. Click Build|Start Debug|Step Into on the Developer Studio menu.
4. Goto the Watch window by selecting View|Debug Windows|Watch.
5. Add the following watch expression in the "Name" column: fun()
Results: You will see the message "Error: cannot display value" in the "Value"
column.
Additional query words:
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Keywords : kbDebug kbide kbVC500bug kbVC600bug kbNoUpdate
Technology : kbVCsearch kbAudDeveloper kbIntegratedDebugger
Version : :5.0,5.0sp1,5.0sp2,6.0
Issue type : kbbug
Solution Type : kbfix
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