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// DESIGN.md item 3, settled: this project models rustc's *debug* profile,
// where signed overflow panics. Nim's default build traps it too, so the two
// agree — including on the exit code.
fn main() {
    let mut x: i32 = 2147483647;
    println!("{}", x);
    x += 1;
    println!("unreachable {}", x);
}