Nested switch break can cause EXCEPTION_ILLEGAL_INSTRUCTION

[m910q]

Despite a nested break;, a switch is still considered to never break when they all return a value.
Causes EXCEPTION_ILLEGAL_INSTRUCTION in Debug and crashes in Release.
Tested in latest nightly.

class Program
{
	public static int Main(String[] args)
	{
        switch (0) {
            case 0:
                if (true) { break; }
                return 1;
            default:
                return 2;
        }
		return 0; // <-- "Unreachable code" warning in IDE
	}
}