4 #![allow(improper_ctypes)]
6 #[link(name = "rust_test_helpers", kind = "static")]
8 pub fn issue_97463_leak_uninit_data(a: u32, b: u32, c: u32) -> u16;
12 const C1: usize = 0x327b23c6;
13 const C2: usize = C1 & 0xFFFF;
18 let value: u16 = unsafe { issue_97463_leak_uninit_data(r1 as u32, r2 as u32, r3 as u32) };
20 // NOTE: as an example of the sensitivity of this test to optimization choices,
21 // uncommenting this block of code makes the bug go away on pnkfelix's machine.
22 // (But observing via `dbg!` doesn't hide the bug. At least sometimes.)
24 println!("{}", value);
25 println!("{}", value as usize);
26 println!("{}", usize::from(value));
27 println!("{}", (value as usize) & 0xFFFF);
31 let d2 = value as usize;
32 let d3 = usize::from(value);
33 let d4 = (value as usize) & 0xFFFF;
35 let d = (&d1, &d2, &d3, &d4);
36 let d_ = (d1, d2, d3, d4);
38 assert_eq!(((&(C2 as u16), &C2, &C2, &C2), (C2 as u16, C2, C2, C2)), (d, d_));