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-manuallydrop-rpass.rs | 44 ++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 tests/ui/union/union-manuallydrop-rpass.rs

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

diff --git a/tests/ui/union/union-manuallydrop-rpass.rs b/tests/ui/union/union-manuallydrop-rpass.rs
new file mode 100644
index 000000000..826bdf07c
--- /dev/null
+++ b/tests/ui/union/union-manuallydrop-rpass.rs
@@ -0,0 +1,44 @@
+// run-pass
+// revisions: mirunsafeck thirunsafeck
+// [thirunsafeck]compile-flags: -Z thir-unsafeck
+
+#![allow(dead_code)]
+
+use std::mem::needs_drop;
+use std::mem::ManuallyDrop;
+
+struct NeedDrop;
+
+impl Drop for NeedDrop {
+    fn drop(&mut self) {}
+}
+
+union UnionOk1<T> {
+    empty: (),
+    value: ManuallyDrop<T>,
+}
+
+union UnionOk2 {
+    value: ManuallyDrop<NeedDrop>,
+}
+
+#[allow(dead_code)]
+union UnionOk3<T: Copy> {
+    empty: (),
+    value: T,
+}
+
+trait Foo { }
+
+trait ImpliesCopy : Copy { }
+
+#[allow(dead_code)]
+union UnionOk4<T: ImpliesCopy> {
+    value: T,
+}
+
+fn main() {
+    // NeedDrop should not make needs_drop true
+    assert!(!needs_drop::<UnionOk1<NeedDrop>>());
+    assert!(!needs_drop::<UnionOk3<&dyn Foo>>());
+}
-- 
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