Why does this not compile?

[Steven Schveighoffer]

On 3/6/18 6:21 AM, Simen Kjærås wrote:
> On Tuesday, 6 March 2018 at 10:03:54 UTC, Shachar Shemesh wrote:
>> void main() {
>>     struct S {
>>         uint value;
>>
>>         ~this() {
>>         }
>>     }
>>
>>     const S a = S(12);
>>     S b = a;
>> }
>>
>> test.d(10): Error: cannot implicitly convert expression a of type 
>> const(S) to S
> 
> Looks like a bug to me - please file one in bugzilla.

Nope. It's not a bug. S contains a pointer, namely the context pointer 
for main.

https://dlang.org/spec/struct.html#nested

Try this:

void main() {
    static struct S {
       uint value;
       ~this() {}
    }
    ... // rest of your code
}

-Steve