From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/test/ui/issues/issue-99838.rs | 40 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 src/test/ui/issues/issue-99838.rs

(limited to 'src/test/ui/issues/issue-99838.rs')

diff --git a/src/test/ui/issues/issue-99838.rs b/src/test/ui/issues/issue-99838.rs
new file mode 100644
index 000000000..eaeeac72b
--- /dev/null
+++ b/src/test/ui/issues/issue-99838.rs
@@ -0,0 +1,40 @@
+// run-pass
+#![feature(bench_black_box)]
+use std::hint;
+
+struct U16(u16);
+
+impl Drop for U16 {
+    fn drop(&mut self) {
+        // Prevent LLVM from optimizing away our alignment check.
+        assert!(hint::black_box(self as *mut U16 as usize) % 2 == 0);
+    }
+}
+
+struct HasDrop;
+
+impl Drop for HasDrop {
+    fn drop(&mut self) {}
+}
+
+struct Wrapper {
+    _a: U16,
+    b: HasDrop,
+}
+
+#[repr(packed)]
+struct Misalign(u8, Wrapper);
+
+fn main() {
+    let m = Misalign(
+        0,
+        Wrapper {
+            _a: U16(10),
+            b: HasDrop,
+        },
+    );
+    // Put it somewhere definitely even (so the `a` field is definitely at an odd address).
+    let m: ([u16; 0], Misalign) = ([], m);
+    // Move out one field, so we run custom per-field drop logic below.
+    let _x = m.1.1.b;
+}
-- 
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