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# Error code E0781

The `cmse-nonsecure-call` ABI can only be used with function pointers.

Erroneous code example:

    #![allow(unused)]
    #![feature(abi_cmse_nonsecure_call)]

    fn main() {
    pub extern "cmse-nonsecure-call" fn test() {}
    }

The `cmse-nonsecure-call` ABI should be used by casting function pointers to specific addresses.