Nested struct sauses error

[Era Scarecrow via Digitalmars-d]

On Sunday, 12 March 2017 at 18:59:43 UTC, Adam D. Ruppe wrote:
> The reason is that access to those local variables needs a 
> hidden pointer that won't be initialized properly without the 
> right construction.

  While it's the most likely reason for the error; Shouldn't it 
detect it never used anything outside and not try to include the 
hidden pointer?