// Test the unstable command-line flag (-Z macro-backtrace) to enable detailed macro backtraces
// across nested local and external macros.
//@ aux-build:ping.rs
//@ revisions: default -Zmacro-backtrace
//@[-Zmacro-backtrace] compile-flags: -Z macro-backtrace

#[macro_use]
extern crate ping;

// a local macro
macro_rules! pong {
    () => { syntax error };
}
//~^^ ERROR expected one of
//~| ERROR expected one of
//~| ERROR expected one of

#[allow(non_camel_case_types)]
struct syntax;

fn main() {
    pong!();
    ping!();
    deep!();
}