Mysterious crash when pen size is less than 2.0

[Kixunil]

This code:

fn fractal(turtle: &mut turtle::Turtle, distance: f64, angles: u32, depth: u32) {
    for _ in 0..angles {
        turtle.forward(distance);
        if depth > 0 {
            fractal(turtle, distance / 2.0, angles, depth - 1);
        }
        turtle.right((360 / angles).into());
    }
}

fn main() {
    turtle::start();
    let mut t1 = turtle::Turtle::new();
    t1.set_speed("instant");
   // Doesn't crash if you comment the following line or change it to 2.0
    t1.set_pen_size(1.0);
    fractal(&mut t1, 160.0, 5, 3);
}

glitches and then crashes without any error message leaving only error code 1.

Possibly relevant environment: Debian 9 in Qubes OS, Rust 1.45.0

[sunjay]

Interesting! Could you tell me what version of the turtle crate you are using? Does it still happen if you change your Cargo.toml to use the following?

turtle = {git = "https://github.com/sunjay/turtle", rev = "bf64b8333a2be1914378d8a22a4788947711182b"}

If it still crashes with that, try removing the "rev" part and running cargo update. That should run the program with the latest changes on master. Let me know if it still crashes with that.

To summarize: the version published on crates.io is fairly out of date and some of the dependencies may be causing a crash. The specific rev I pointed to has a more recent version of the dependencies and so may fix this issue for now. The master branch has the latest version of the crate but unfortunately we have a bunch of platform specific issues in our dependencies (#183) that make it very difficult to do a release right now.

Please let me know if any of that works/if it changes anything! Thanks for taking the time to report this!

[Kixunil]

I had turtle = "1.0.0-rc.3", after changing to turtle = {git = "https://github.com/sunjay/turtle", rev = "bf64b8333a2be1914378d8a22a4788947711182b"} it works! I tried to fiddle with the values a bit and it didn't crash at all.

Thanks, closing in favor of #183

[sunjay]

Great! Glad we were able to get it fixed! 🎉