Comment by raphlinus

Along similar lines, from my skim of the README, it also seems like deallocated things are not actually released until the return from the nearest autorelease block, which is not exactly convenient for Rust (and it's not properly safe either without at least an extra retain). I always imagined that when you call through Swift it's a more native memory management interface, but perhaps it's also the same Obj-C layer under the hood.