#![no_main]
#![no_std]
extern crate cortex_m_rt;
extern crate panic_halt;
use cortex_m_rt::{entry, interrupt};
#[entry]
fn foo() -> ! {
loop {}
}
#[allow(non_camel_case_types)]
enum interrupt {
USART1,
}
#[interrupt]
fn USART1() -> i32 {
//~^ ERROR `#[interrupt]` handlers must have signature `[unsafe] fn() [-> !]`
0
}