vect_mut_bug.rs

struct Circle { radius: int }
trait Shape {}
impl Shape for Circle {}

fn main() {
  //Doesn't crash if 'all' is immutable:
	// let all: ~[~Shape] = ~[~Circle{radius: 2} as ~Shape];

	//Doesn't crash if 'all' is mutable:
	// let mut all: ~[~Shape] = ~[~Circle{radius: 2} as ~Shape];

	//Does crash if 'all' is mutable, and is pushed to
	let mut all: ~[~Shape] = ~[];
	all.push(~Circle{radius: 2} as ~Shape);

	//makes it here, then crashes when returning from main
	io::println("kaboom!");
}

// > 'kaboom!'
// > fatal crash on Windows 7 x64