CTFE and return statement from delegate

[Rajesh]

This is simplified code which I am using in my project.


```
struct NumberType
{
     int num;

     int opApply(int delegate(int) dg)
     {
         int result = dg(num);
         return result;
     }
}

struct Problem {
     int value;

     this(int val) {
         auto myType = NumberType(18);

         foreach (int number; myType)
         {
             return;
         }
     }
}

auto compile_time_var = Problem(1);

void TestFunction() {
     auto runtime_var = Problem(1);
}
```

I am creating instance of Problem struct in runtime and compile 
time. Following call is giving me compilation time.

```
auto compile_time_var = Problem(1);
```

Following is the error:
```
Error: variable `__capture` cannot be read at compile time
```

Is there a restriction that I cannot call **return** from foreach 
(opApply delegate) if it is executed at compile time?