// We want to control preemption here. //@compile-flags: -Zmiri-preemption-rate=0 //@ignore-target-windows: Concurrency on Windows is not supported yet. use std::thread::spawn; #[derive(Copy, Clone)] struct EvilSend(pub T); unsafe impl Send for EvilSend {} unsafe impl Sync for EvilSend {} pub fn main() { let mut a = 0u32; let b = &mut a as *mut u32; let c = EvilSend(b); unsafe { let j1 = spawn(move || { *c.0 = 32; }); let j2 = spawn(move || { *c.0 = 64; //~ ERROR: Data race detected between Write on thread `` and Write on thread `` }); j1.join().unwrap(); j2.join().unwrap(); } }