src/test/ui/cmse-nonsecure/cmse-nonsecure-entry/wrong-abi.rs

// compile-flags: --target thumbv8m.main-none-eabi --crate-type lib
// only-thumbv8m.main-none-eabi
#![feature(cmse_nonsecure_entry)]
#![no_std]

#[no_mangle]
#[cmse_nonsecure_entry]
pub fn entry_function(a: u32, b: u32, c: u32, d: u32) -> u32 { //~ ERROR [E0776]
    a + b + c + d
}