INFO: Undocumented Warning C4509

• The Microsoft C/C++ Compiler (CL.EXE) included with: - Microsoft Visual C++, 32-bit Edition, versions 1.0, 2.0, 4.0

SUMMARY

The following warning was added to the Win32 beta SDK compiler and the Visual C++ 32-bit compiler version 1.0:

   warning C4509: nonstandard extension used: '<function>' uses SEH and
      '<variable>' has destructor

Currently, we do not destruct objects in an exception unwind.

MORE INFORMATION

This warning is not documented in Microsoft Visual C++, 32-bit Edition, versions 1.0, 2.x, or 4.0.

Code that produces the warning described above, where <function> is MyFunction and the variable is mc, resembles the following .CPP file:

   // compile with /c /W3

   struct MyClass {
           public:
           MyClass();
           ~MyClass();
   };

   void myfunc()
   {
           MyClass mc;

           __try
           {
           //..
           }

           __finally
           {
         //..
           }

   }