PSS ID Number: 255528
Article Last Modified on 10/16/2002
The information in this article applies to:
- Microsoft C/C++ Compiler (CL.EXE)
This article was previously published under Q255528
SYMPTOMS
An access violation may occur if you have a class derived from ostringstream and if this class has a constructor with variable number of arguments.
CAUSE
Incorrect code is generated when the first argument in the variable argument list is a zero.
RESOLUTION
To workaround the problem, use any one of the following three resolutions:
- Do not use variable number of arguments for the class constructor.
- Let the first argument in the constructor's variable argument list be a non-zero value.
- Use a default class constructor with no arguments and then call another member function with a variable argument list.
STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.
MORE INFORMATION
Steps to Reproduce Behavior
Compile Options : cl /GX test.cpp
//Test.cpp
#include <iostream>
#include <sstream>
using namespace std;
class Test : public ostringstream
{
public:
Test(bool n, ...)
{
}
};
void main()
{
cout << "Calling Test " << endl;
Test my_test1(true, 1); //OK.
cout << "Calling Test again " << endl;
Test my_test2(true, 0); //Causes Access Violation
}
Keywords: kbBug kbCPPonly kbSTL KB255528
Technology: kbAudDeveloper kbCVCComp kbVCsearch
