> I guess the solution would be to add an explicit API to create a GC root, invoked by native methods (which is a bit complicated by the fact that I use a movin

> I guess the solution would be to add an explicit API to create a GC root, invoked by native methods (which is a bit complicated by the fact that I use a moving collector). This is why I do in the Wren VM. Any time a native C function has the only reference to a GC-managed object and it's possible for a collection to occur, it calls a function to temporarily add the object to a list of known roots.