Let's get the semantic around closure fixed.

[Ola Fosheim Grostad]

On Tuesday, 18 May 2021 at 17:40:17 UTC, Max Haughton wrote:
> On Tuesday, 18 May 2021 at 16:47:03 UTC, deadalnix wrote:
>> Long story short: 
>> https://issues.dlang.org/show_bug.cgi?id=21929
>>
>> Closure do not respect scope the way they should. Let's fix it.
>
> Time to consider by-value captures? Closures (specifically the 
> way they interact with the GC) seem problematic in general, not 
> just here.

Does a delegate do anything more than retaining a pointer to the 
stack record?
Anyway, it should not escape the scope it references. So escape 
analysis is your friend.