{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"//"}]}
        // So the error type is `InterpResult<'tcx, &Allocation<M::Provenance>>`.
        // `get_global_alloc` that we can actually use directly without inserting anything anywhere.
        let a = self.memory.alloc_map.get_or(id, || {