Visual C/C++ 6.0. Using SEH

I'm facing a problem in using SEH (structured exceptions handling) in VC 6.0.
Please, create (using Visual C/C++ 6.0) an Empty Console application. Use
following source to build the application:

--------------------------------
class A
{
public:
    operator const __int64() const
    {
        return 33i64; // random number
    }

};

inline bool operator!=(const A& val1, const __int64& val2)
{
    return false; // doesnt matter what it returns
}

static A g_a;

bool func()
{
    __try
    {
        return (g_a != 0i64);
    }
    __finally
    {
    }
    return 0;
}

void main(void)
{
    // Check the returned value
    bool bRetVal = func();

} // Place a breakpoint here and check the value of bRetVal

--------------------------------

Run the application and check the value returned by func(). In my case it is
24, but it should be false <zero>. Actually (after number of tests) I found
that it is a random number.

Can somebody, please, explain what is going on?
This code should be working, or I should get a compiler error.
I'm not looking for workaround. I just want to understand - am I wrong, or
there is something with the compiler. Thank you !!!
* I've tried the same source using VC 2003 and it works fine.