Why does this simple test program leak 500MB of RAM?

[Bastiaan Veelo]

On Friday, 30 June 2023 at 13:18:12 UTC, FeepingCreature wrote:
> I think miniscule stack leaks must be keeping large GC pools 
> alive here.

Just throwing this in here in case it is of significance: Does 
adding `"--DRT-gcopt=gc:precise"` as a command line option make 
any difference?

https://dlang.org/spec/garbage.html#precise_gc

-- Bastiaan.