#![no_main] #![no_std] extern crate cortex_m_rt; extern crate panic_halt; use cortex_m_rt::{entry, exception, ExceptionFrame}; #[entry] fn foo() -> ! { loop {} } #[exception(trampoline = true)] unsafe fn HardFault() -> ! { //~^ ERROR `HardFault` handler must have signature `unsafe fn(&ExceptionFrame) -> !` loop {} }