Article ID: 216720
Article Last Modified on 11/18/2003
APPLIES TO
- Microsoft Visual C++ 6.0 Enterprise Edition
- Microsoft Visual C++ 6.0 Professional Edition
- Microsoft Visual C++ 6.0 Standard Edition
This article was previously published under Q216720
SYMPTOMS
When using a bitwise OR operation on a bool reference and compiling with optimizations that include /Og (global optimizations), the resulting executable may generate an access violation.
CAUSE
The current implementation of a bool is an 8-bit value. The OR operation with /Og on a bool reference operates on a 32-bit value.
RESOLUTION
Do not use bitwise operators with bool references. Use bool values instead.
STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.
This bug was corrected in Visual Studio 6.0 Service Pack 3. For more information about Visual Studio service packs, please see the following articles in the Microsoft Knowledge Base:
MORE INFORMATION
Steps to Reproduce Behavior
Compile with /Og
// Workaround: replace the bool& with bool
void func(bool& boolref, float a, float b)
{
boolref |= (a == b);
}
void main()
{
bool b1 = true;
float f1 = 2.0;
float f2 = 2.0;
func(b1,f1,f2);
}
Keywords: kbbug kbfix kbvc600fix kbvs600sp3fix KB216720
