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//@ run-pass
//@ needs-subprocess
//@ needs-unwind
fn check_for_no_backtrace(test: std::process::Output) {
assert!(!test.status.success());
let err = String::from_utf8_lossy(&test.stderr);
let mut it = err.lines().filter(|l| !l.is_empty());
assert_eq!(it.next().map(|l| l.starts_with("thread '<unnamed>' panicked")), Some(true));
assert_eq!(it.next().is_some(), true);
assert_eq!(
it.next(),
Some(
"note: run with `RUST_BACKTRACE=1` \
environment variable to display a backtrace"
)
);
assert_eq!(it.next().map(|l| l.starts_with("thread 'main' panicked at")), Some(true));
assert_eq!(it.next().is_some(), true);
assert_eq!(it.next(), None);
}
fn main() {
let args: Vec<String> = std::env::args().collect();
if args.len() > 1 && args[1] == "run_test" {
let _ = std::thread::spawn(|| {
panic!();
})
.join();
panic!();
} else {
let test = std::process::Command::new(&args[0])
.arg("run_test")
.env_remove("RUST_BACKTRACE")
.output()
.unwrap();
check_for_no_backtrace(test);
let test = std::process::Command::new(&args[0])
.arg("run_test")
.env("RUST_BACKTRACE", "0")
.output()
.unwrap();
check_for_no_backtrace(test);
}
}
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