Passing template instances by value to a managed function - Compiler Bug in VS 2003?

[Daniel G?rsch]

The following code works perfect in VS 2002 (compiled in a console
project). Using VS 2003 the variable 'a' in the 'compute' function of
the managed class 'M' is not correctly passed into this function.

Actually using the debugger shows that the copy constructor of class
'A' is called correctly, but nevertheless the variable 'a' in the
'compute' function is not initilized, that is 'a.i' has random values.

Additionally starting the application gives an exception after the
call of the 'compute' function.

I found that forcing the compiler to generate the template instance
'A<int>' using the code line
'template A<int>' solves the problem.

From my point of view this is a compiler bug!

Here is the code:

#include <iostream>
#using <mscorlib.dll>

template <class C>
class A
{
public:

C c;
int i;

A(): c(C()), i(0)
{
}

A(const A& a): c(a.c), i(a.i)
{
}
};

// Remove the comment signs in order to solve the problem
//template A<int>;

public __gc class M
{
public:

M()
{

}

void compute(A<int> a)
{
std::cout << a.i;
}
void test()
{
A<int> a;

compute(a);
}
};

int main()
{
M* m = new M();

m->test();

return 0;
}