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diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/struct.rs b/third_party/rust/zerocopy-derive/tests/ui-nightly/struct.rs
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+// Copyright 2019 The Fuchsia Authors
+//
+// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0
+// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT
+// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
+// This file may not be copied, modified, or distributed except according to
+// those terms.
+
+#[macro_use]
+extern crate zerocopy;
+
+#[path = "../util.rs"]
+mod util;
+
+use zerocopy::KnownLayout;
+
+use self::util::AU16;
+
+fn main() {}
+
+//
+// KnownLayout errors
+//
+
+struct NotKnownLayout;
+
+struct NotKnownLayoutDst([u8]);
+
+// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name |
+// |          N |        N |              N |        N |      KL00 |
+#[derive(KnownLayout)]
+struct KL00(u8, NotKnownLayoutDst);
+
+// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name |
+// |          N |        N |              Y |        N |      KL02 |
+#[derive(KnownLayout)]
+struct KL02(u8, [u8]);
+
+// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name |
+// |          Y |        N |              N |        N |      KL08 |
+#[derive(KnownLayout)]
+#[repr(C)]
+struct KL08(u8, NotKnownLayoutDst);
+
+// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name |
+// |          Y |        N |              N |        Y |      KL09 |
+#[derive(KnownLayout)]
+#[repr(C)]
+struct KL09(NotKnownLayout, NotKnownLayout);
+
+//
+// AsBytes errors
+//
+
+#[derive(AsBytes)]
+#[repr(C)]
+struct AsBytes1<T>(T);
+
+#[derive(AsBytes)]
+#[repr(C)]
+struct AsBytes2 {
+    foo: u8,
+    bar: AU16,
+}
+
+#[derive(AsBytes)]
+#[repr(C, packed(2))]
+struct AsBytes3 {
+    foo: u8,
+    // We'd prefer to use AU64 here, but you can't use aligned types in
+    // packed structs.
+    bar: u64,
+}
+
+//
+// Unaligned errors
+//
+
+#[derive(Unaligned)]
+#[repr(C, align(2))]
+struct Unaligned1;
+
+#[derive(Unaligned)]
+#[repr(transparent, align(2))]
+struct Unaligned2 {
+    foo: u8,
+}
+
+#[derive(Unaligned)]
+#[repr(packed, align(2))]
+struct Unaligned3;
+
+#[derive(Unaligned)]
+#[repr(align(1), align(2))]
+struct Unaligned4;
+
+#[derive(Unaligned)]
+#[repr(align(2), align(4))]
+struct Unaligned5;