Please help to resolve this mystic problem

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Please take a look at the simple console app code below:

#include "stdafx.h"

#using <mscorlib.dll>

using namespace System;

typedef struct {
unsigned long checkSum;
} DATALOG_FILE;

class CLogConfig
{
public:
CLogConfig();
~CLogConfig();

public:
DATALOG_FILE log [16];
};

CLogConfig::CLogConfig()
{
}

CLogConfig::~CLogConfig()
{
}

int _tmain()
{
CLogConfig m_LogConfig;

m_LogConfig.log[0].checkSum = 123 ;
m_LogConfig.log[5].checkSum = 456 ;
m_LogConfig.log[9].checkSum = 789 ;

return 0;
}

I set breakpoint at the beginning of main procedure, run this program in
VS.NET 2003 debugger and debug it step by step. I add
m_LogConfig.log[0].checkSum
values to watch window and observe the following:

The first statement works fine and value 123 assigned to
m_LogConfig.log[0].checkSum

However the second and third statement due to unknown reasons do not assign
values 456 and 789.

Even when I open QuickWatch window and try to change value of variable
m_LogConfig.log[5].checkSum the error dialog "Cannot Change Value" pops up.

Can anyone explain what is going wrong with this code?

Thank you
 
It looks like a bug in the debugger or build tools.

You can use tracing / console output to verify that the application
itself works correctly.

Regards,
Oleg
[VC++ MVP]
 
You are right. This is debugger bug. Tracing confirmed that all values are
set corectly.

I wonder whether someone in Microsoft will look into this problem or not?

Thanks
 
Hi Oleg,
You are right. This is debugger bug. Tracing confirmed that all values are
set corectly.
Click to expand...

I was able to replicate your problem here. It does happen with VC .NET 2003.

I've runned it under Whidbey Beta 1 too, and the "good" news is that
apparently it has been fixed. ;-)

Fabro
 
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