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#[repr(C)]
#[derive(Copy, Clone)]
struct ComplexStruct {
part_1: Part1,
part_2: Part2,
part_3: u32,
}
#[repr(C)]
#[derive(Copy, Clone)]
struct Part1 {
high: u16,
low: u16,
}
#[repr(C)]
#[derive(Copy, Clone)]
struct Part2 {
bits: u32,
}
extern "C" {
fn pass_struct_complex(s: ComplexStruct, high: u16, low: u16, bits: u32) -> i32;
}
fn main() {
let arg = std::mem::MaybeUninit::<ComplexStruct>::uninit();
unsafe { pass_struct_complex(*arg.as_ptr(), 0, 0, 0) }; //~ ERROR: Undefined Behavior: constructing invalid value
}
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