Fake news and FUD and other balderdash. A space leak, much like any memory leak is when you or the compiler or the runtime or whoever misplaces such reference.

Fake news and FUD and other balderdash. A space leak, much like any memory leak is when you or the compiler or the runtime or whoever misplaces such reference. GHC having a closure in scope in no way immediately means there is a space leak. Plenty of Haskell code that compiles to thunks will run all day in an amortized fixed-size heap. Much like Erlang, which is what Joe Armstrong had designed before he said the thing about jungles you’ve quoted. And it is in no way difficult or even really rare to drop an Arc in a table and leak all over the place. Rust has all the same computer science problems as anything else. Full stop.