From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:03 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 tests/ui/union/union-move.rs | 56 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 tests/ui/union/union-move.rs

(limited to 'tests/ui/union/union-move.rs')

diff --git a/tests/ui/union/union-move.rs b/tests/ui/union/union-move.rs
new file mode 100644
index 000000000..b8b1ac804
--- /dev/null
+++ b/tests/ui/union/union-move.rs
@@ -0,0 +1,56 @@
+// revisions: mirunsafeck thirunsafeck
+// [thirunsafeck]compile-flags: -Z thir-unsafeck
+
+//! Test the behavior of moving out of non-`Copy` union fields.
+//! Avoid types that `Drop`, we want to focus on moving.
+
+use std::cell::RefCell;
+use std::mem::ManuallyDrop;
+
+fn move_out<T>(x: T) {}
+
+union U1 {
+    f1_nocopy: ManuallyDrop<RefCell<i32>>,
+    f2_nocopy: ManuallyDrop<RefCell<i32>>,
+    f3_copy: i32,
+}
+
+union U2 {
+    f1_nocopy: ManuallyDrop<RefCell<i32>>,
+}
+impl Drop for U2 {
+    fn drop(&mut self) {}
+}
+
+fn test1(x: U1) {
+    // Moving out of a nocopy field prevents accessing other nocopy field.
+    unsafe {
+        move_out(x.f1_nocopy);
+        move_out(x.f2_nocopy); //~ ERROR use of moved value: `x`
+    }
+}
+
+fn test2(x: U1) {
+    // "Moving" out of copy field doesn't prevent later field accesses.
+    unsafe {
+        move_out(x.f3_copy);
+        move_out(x.f2_nocopy); // no error
+    }
+}
+
+fn test3(x: U1) {
+    // Moving out of a nocopy field prevents accessing other copy field.
+    unsafe {
+        move_out(x.f2_nocopy);
+        move_out(x.f3_copy); //~ ERROR use of moved value: `x`
+    }
+}
+
+fn test4(x: U2) {
+    // Cannot move out of union that implements `Drop`.
+    unsafe {
+        move_out(x.f1_nocopy); //~ ERROR cannot move out of type `U2`, which implements the `Drop`
+    }
+}
+
+fn main() {}
-- 
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