GC: memory collected but destructors not called

[Shachar Shemesh via Digitalmars-d]

On 10/11/14 16:19, Steven Schveighoffer wrote:
>
> Only classes call dtors from the GC. Structs do not. There are many
> hairy issues with structs calling dtors from GC. Most struct dtors
> expect to be called synchronously, and are not expecting to deal with
> multithreading issues.
>
> Note that structs inside classes WILL call dtors.

How is this any different? If one should not be allowed, how is the 
other okay?

Shachar