Alan-Chen99

Hmm apprently miri approves this code: ```rust let stackvec = UnsafeCell::new(Box::new(Box::new(Cell::new(1)))); // pointer held in Rt let rootvec = stackvec.get(); // pointer held in StackRoot let gcptr = stackvec.get() as...

how about we temporarily mark a hashmap as immutable when iterating through it?

What behavior do the code that inserts while iterating expect? perhaps we can keep a vector for "objects to be inserted" and insert them after iteration has finished?