Unfortunately I don't have any good suggestions... I have been avoiding depending on dtors in D because of the aforementioned issues (and more), so I haven't had much experience in debugging dtor-related problems inD.
I decided to just free everything explicitly:
https://github.com/maximecb/Higgs/blob/03931178deb5794bf27b1020542d102a08286c07/source/runtime/vm.d#L784It seems to address my memory leak issue for the moment: `make test` uses about 1/3 the memory and runs more than twice as fast.
