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?