Rust plotters doesn't draw - rust

Question

I'm trying to run one of the examples from rust's plotters user guide. For some reason, whenI run the example, no image is written out to images/. I looked through the whole project structure, no images are written to examples/ or otherwise.
Here's the output from cargo run:
plotters % cargo run
Finished dev [unoptimized + debuginfo] target(s) in 0.06s
Running `target/debug/plotters`
Here's the code:
use plotters::prelude::*;
fn main() {
let root_drawing_area = BitMapBackend::new("images/0.1.png", (1024, 768))
.into_drawing_area();
root_drawing_area.fill(&WHITE).unwrap();
let mut chart = ChartBuilder::on(&root_drawing_area)
.build_cartesian_2d(-3.14..3.14, -1.2..1.2)
.unwrap();
chart.draw_series(LineSeries::new(
(-314..314).map(|x| x as f64 / 100.0).map(|x| (x, x.sin())),
&RED
)).unwrap();
root_drawing_area.present().unwrap();
}
Am I missing something?
Edit:
I added the explicit call to root_drawing_area.present().unwrap();, now I get a helpful error message:
% cargo run
Compiling plotters v0.1.0 (/Users/sledge/Sandbox/plotters)
Finished dev [unoptimized + debuginfo] target(s) in 0.82s
Running `target/debug/plotters`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: BackendError(DrawingError(ImageError(IoError(Os { code: 2, kind: NotFound, message: "No such file or directory" }))))', src/main.rs:18:33
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace