unbreakable-large-return-value

using System;
using System.Collections.Generic;

struct A_1 { public int A; public int B; }
struct A_2 { public A_1 A; public A_1 B; }
struct A_3 { public A_2 A; public A_2 B; }
struct A_4 { public A_3 A; public A_3 B; }
struct A_5 { public A_4 A; public A_4 B; }
struct A_6 { public A_5 A; public A_5 B; }
struct A_7 { public A_6 A; public A_6 B; }
struct A_8 { public A_7 A; public A_7 B; }
struct A_9 { public A_8 A; public A_8 B; }
struct A_10 { public A_9 A; public A_9 B; }
struct A_11 { public A_10 A; public A_10 B; }
struct A_12 { public A_11 A; public A_11 B; }
struct A_13 { public A_12 A; public A_12 B; }
struct A_14 { public A_13 A; public A_13 B; }
struct A_15 { public A_14 A; public A_14 B; }
struct A_16 { public A_15 A; public A_15 B; }
struct A_17 { public A_16 A; public A_16 B; }
struct A_18 { public A_17 A; public A_17 B; }

static class Program {
    static A_18 Value = default(A_18);
    static object Run() {
        return new KeyValuePair<int, A_18>(0, Value);
    }
}