rust/tests/ui/unwind-abis/ffi-unwind-calls-lint.rs

// build-pass
// needs-unwind

#![warn(ffi_unwind_calls)]

mod foo {
    #[no_mangle]
    pub extern "C-unwind" fn foo() {}
}

extern "C-unwind" {
    fn foo();
}

fn main() {
    // Call to Rust function is fine.
    foo::foo();
    // Call to foreign function should warn.
    unsafe { foo(); }
    //~^ WARNING call to foreign function with FFI-unwind ABI
    let ptr: extern "C-unwind" fn() = foo::foo;
    // Call to function pointer should also warn.
    ptr();
    //~^ WARNING call to function pointer with FFI-unwind ABI
}