rust/tests/fail/copy_half_a_pointer.rs

22 lines
538 B
Rust

//@normalize-stderr-test: "\+0x[48]" -> "+HALF_PTR"
#![allow(dead_code)]
// We use packed structs to get around alignment restrictions
#[repr(packed)]
struct Data {
pad: u8,
ptr: &'static i32,
}
static G: i32 = 0;
fn main() {
let mut d = Data { pad: 0, ptr: &G };
// Get a pointer to the beginning of the Data struct (one u8 byte, then the pointer bytes).
let d_alias = &mut d as *mut _ as *mut *const u8;
unsafe {
let _x = d_alias.read_unaligned(); //~ERROR: unable to copy parts of a pointer
}
}