mixin under -betterC

[DLearner]

On Thursday, 23 November 2023 at 17:02:58 UTC, Paul Backus wrote:
[...]
> This is a known limitation: 
> https://issues.dlang.org/show_bug.cgi?id=23637
>
[...]

Sorry to come back to this, but the reference above suggests 
_not_ a bug in the compiler.

If not a bug in the compiler, please, what is going on?
I repeat that the only possible trigger I see for the GC
are the ~ that happen at compile, not run, time.