src/test/run-fail/meta-revision-bad.rs

// Meta test for compiletest: check that when we give the wrong error
// patterns, the test fails.

// revisions: foo bar
// should-fail
//[foo] error-pattern:bar
//[bar] error-pattern:foo

#[cfg(foo)]
fn die() {
    panic!("foo");
}
#[cfg(bar)]
fn die() {
    panic!("bar");
}

fn main() {
    die();
}