On Friday, 14 December 2018 at 21:22:05 UTC, unDEFER wrote:
So it looks like a bug, and I have reported about it:https://issues.dlang.org/show_bug.cgi?id=19487
Not an expert, but you may wish to try GC.minimize() (https://dlang.org/phobos/core_memory.html#.GC.minimize).
