recursive function call at compile time

[Oleg]

Hello.
I want use recursion, but in my situation compiler doesn't 
correct work.

import std.stdio;

struct MyStruct(uint K)
{
    real[K] data;

    auto getSmaller()
    {
        MyStruct!(K-1) ret;
        foreach( no, ref d; ret.data )
            d = data[no];
        return ret;
    }

    real recursionAlgo()
    {
        static if( K == 1 ) return data[0];
        else
        {
            real sum = 0;
            foreach( i; 1 .. K )
                sum += getSmaller().recursionAlgo();
            return sum;
        }
    }
}

void main()
{
    MyStruct!(5) a;
    a.data = [ 1, 2, 3, 4, 5 ];
    writeln( a.recursionAlgo() );
}

at compile time i have errors
./recursion.d(7): Error: index 4294967295 overflow for static 
array
./recursion.d(7): Error: index 4294967294 overflow for static 
array
.... etc

i think it's happens because compiler call 'recursionAlgo()' 
where it should not be ( K == 1 )

how to turn off compile time calculation in this part of code?