RUST: Newbie woes: Spinning-Square Demo Crashes ???

[Webtest]

Esteemed Forum Participants and Lurkers:
I'm just beginning to investigate "Rust", with a reasonable level of success ... until now.

I found a 'simple' graphics program using Piston graphics engine and presents a red spinning square in a green window: Piston Developers/Piston-Tutorials

It builds, but when I try to run it, it crashes with:

• thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: "GL context creation failed"', libcore/result.rs:945:5
  note: Run with `RUST_BACKTRACE=1` for a backtrace.

I've spent over 2 hours trying to google all over rust, GitHub, and elsewhere for a solution, or even how to get the 'BACKTRACE' to do anything, but I have had ZERO success. I'm out of time today, but next week when I get the chance I'll try the rust-beginners IRC. I have used a couple of other chat groups, but this will be my first for Rust.

Thank you for any and all comments, suggestions, and assistance.
Blessings in abundance,
Art in Carlisle, PA USA

[xenopeek]

Build a debug target. Then run it as:
RUST_BACKTRACE=1 cargo run
Or to make RUST_BACKTRACE=1 the default for your current terminal session, run this once:
export RUST_BACKTRACE=1
Then as long as you keep the terminal open Rust will do the backtrace for any Rust commands started from this terminal that panic.