1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/packed/packed-struct-borrow-element-64bit.rs b/src/test/ui/packed/packed-struct-borrow-element-64bit.rs
new file mode 100644
index 000000000..00bddfe40
--- /dev/null
+++ b/src/test/ui/packed/packed-struct-borrow-element-64bit.rs
@@ -0,0 +1,18 @@
+// run-pass (note: this is spec-UB, but it works for now)
+// ignore-32bit (needs `usize` to be 8-aligned to reproduce all the errors below)
+#![allow(dead_code)]
+// ignore-emscripten weird assertion?
+
+#[repr(C, packed(4))]
+struct Foo4C {
+    bar: u8,
+    baz: usize
+}
+
+#[warn(unaligned_references)]
+pub fn main() {
+    let foo = Foo4C { bar: 1, baz: 2 };
+    let brw = &foo.baz; //~WARN reference to packed field is unaligned
+    //~^ previously accepted
+    assert_eq!(*brw, 2);
+}