[Issue 21745] Closure created in struct constructor passed to class constructor is not heap allocated

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21745

--- Comment #4 from FeepingCreature <default_357-line at yahoo.de> ---
I think that's correct.

Since it's a struct, it should save "this" by value though. typeof(this) is
Foo, not Foo*.

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