If I understand correctly this:      let mut a = [0; 10_000];     gets me an array of 10,000 elements on the stack.  And this:      let mut a = Box::new([0; 10_000]);     gets me 10,000 elements allocated on the heap.  So I was surprised that this:      let mut a = Box::new([0; 10_000_000]);  Gets me a stack overflow:  thread 'main' has overflowed its stack fatal runtime error: stack overflow  What am I not understanding here?  https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&g...

This is possibly the same bug as #40862 Using the latest version of Rust rustc 1.27.2 (58cc626 2018-07-18) The following code causes a stack overflow #[test] fn test_boxed() { let a = Box::new([-1;...