Comment by mananaysiempre

You can only make a C API for interacting with a precise garbage collector that ergonomic. And, to be honest, I wouldn’t call the situation described by the GGP particularly problematic—you messed up memory accounting and you got a memory leak. In most garbage-collected runtimes, if the runtime messes up memory accounting, at best you get immediate memory corruption, at worst you get memory corruption much later in some unrelated part of your heap. So this is pretty mild all things considered. Of course, if you’re working in a language with greater metaprogramming capabilities than C, absolutely do abstract the stack into something more manageable.