mem-isolate: Run unsafe code safely mem-isolate runs your function via a fork(), waits for the result, and returns it. This grants your code access to an exact copy of memory and state at the time just before the call, but guarantees that the function will not affect the parent process's memory footprint in any way. It forces functions to be memory pure (pure with respect to memory), even if they aren't. use mem_isolate::execute_in_isolated_process; // No heap, stack, or program memory out here....