rust/tests/compile-fail/backtrace/bad-backtrace-size-flags.rs

extern "Rust" {
    fn miri_backtrace_size(flags: u64) -> usize;
}

fn main() {
    unsafe {
        miri_backtrace_size(2); //~ ERROR  unsupported operation: unknown `miri_backtrace_size` flags 2
    }
}