#![no_main]#![no_std]externcratelm3s6965;externcratepanic_halt;externcratertfm;usertfm::app;#[app(device = lm3s6965)]constAPP: ()={#[init]fninit(){}#[interrupt]fnUART0(undef: u32){//~^ ERROR `interrupt` handlers must have type signature `[unsafe] fn()`}};