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Compiler Warning (level 3, off) C4265

  • Article

'classname': class has virtual functions, but its non-trivial destructor is not virtual; instances of this class may not be destructed correctly

When a class has virtual functions but a nonvirtual destructor, objects of the type might not be destroyed properly when the class is destroyed through a base class pointer.

This warning is off by default. For more information, see Compiler Warnings That Are Off by Default.

The following sample generates C4265:

// C4265.cpp
// compile with: /W3 /c
#pragma warning(default : 4265)
class B
{
public:
   virtual void vmf();

   ~B();
   // try the following line instead
   // virtual ~B();
};   // C4265

int main()
{
   B b;
}