Rehome tests/ui/issues/ tests [4/?]

1 files changed, 41 insertions, 0 deletions

diff --git a/tests/ui/packed/misaligned-reference-drop-field-99838.rs b/tests/ui/packed/misaligned-reference-drop-field-99838.rs
new file mode 100644
index 00000000000..58e168162cb
--- /dev/null
+++ b/tests/ui/packed/misaligned-reference-drop-field-99838.rs
@@ -0,0 +1,41 @@
+// https://github.com/rust-lang/rust/issues/99838
+//@ run-pass
+
+use std::hint;
+
+struct U16(#[allow(dead_code)] 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(#[allow(dead_code)] 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;
+}