Move all compile-fail tests to ui tests

The update-references.sh script makes these much easier to update in
bulk compared to compile-fail tests.

test_suite/tests/ui/borrow/bad_lifetimes.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct Test<'a> {
+    #[serde(borrow = "zzz")]
+    s: &'a str,
+}
+
+fn main() {}

test_suite/tests/ui/borrow/bad_lifetimes.stderr

@@ -0,0 +1,8 @@
+error: failed to parse borrowed lifetimes: "zzz"
+  --> $DIR/bad_lifetimes.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/borrow/duplicate_lifetime.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct Test<'a> {
+    #[serde(borrow = "'a + 'a")]
+    s: &'a str,
+}
+
+fn main() {}

test_suite/tests/ui/borrow/duplicate_lifetime.stderr

@@ -0,0 +1,8 @@
+error: duplicate borrowed lifetime `'a`
+  --> $DIR/duplicate_lifetime.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/borrow/duplicate_variant.rs

@@ -0,0 +1,21 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct Str<'a>(&'a str);
+
+#[derive(Deserialize)]
+enum Test<'a> {
+    #[serde(borrow)]
+    S(#[serde(borrow)] Str<'a>),
+}
+
+fn main() {}

test_suite/tests/ui/borrow/duplicate_variant.stderr

@@ -0,0 +1,8 @@
+error: duplicate serde attribute `borrow`
+  --> $DIR/duplicate_variant.rs:15:10
+   |
+15 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/borrow/empty_lifetimes.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct Test<'a> {
+    #[serde(borrow = "")]
+    s: &'a str,
+}
+
+fn main() {}

test_suite/tests/ui/borrow/empty_lifetimes.stderr

@@ -0,0 +1,8 @@
+error: at least one lifetime must be borrowed
+  --> $DIR/empty_lifetimes.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/borrow/no_lifetimes.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct Test {
+    #[serde(borrow)]
+    s: String,
+}
+
+fn main() {}

test_suite/tests/ui/borrow/no_lifetimes.stderr

@@ -0,0 +1,8 @@
+error: field `s` has no lifetimes to borrow
+  --> $DIR/no_lifetimes.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/borrow/struct_variant.rs

@@ -0,0 +1,21 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct Str<'a>(&'a str);
+
+#[derive(Deserialize)]
+enum Test<'a> {
+    #[serde(borrow)]
+    S { s: Str<'a> },
+}
+
+fn main() {}

test_suite/tests/ui/borrow/struct_variant.stderr

@@ -0,0 +1,8 @@
+error: #[serde(borrow)] may only be used on newtype variants
+  --> $DIR/struct_variant.rs:15:10
+   |
+15 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/borrow/wrong_lifetime.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct Test<'a> {
+    #[serde(borrow = "'b")]
+    s: &'a str,
+}
+
+fn main() {}

test_suite/tests/ui/borrow/wrong_lifetime.stderr

@@ -0,0 +1,8 @@
+error: field `s` does not have lifetime 'b
+  --> $DIR/wrong_lifetime.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/conflict/adjacent-tag.rs

@@ -0,0 +1,19 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+#[serde(tag = "conflict", content = "conflict")]
+enum E {
+    A,
+    B,
+}
+
+fn main() {}

test_suite/tests/ui/conflict/adjacent-tag.stderr

@@ -0,0 +1,8 @@
+error: enum tags `conflict` for type and content conflict with each other
+  --> $DIR/adjacent-tag.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/conflict/flatten-newtype-struct.rs

@@ -0,0 +1,15 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct Foo(#[serde(flatten)] HashMap<String, String>);
+
+fn main() {}

test_suite/tests/ui/conflict/flatten-newtype-struct.stderr

@@ -0,0 +1,8 @@
+error: #[serde(flatten)] cannot be used on newtype structs
+  --> $DIR/flatten-newtype-struct.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/conflict/flatten-skip-deserializing.rs

@@ -0,0 +1,23 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct Foo {
+    #[serde(flatten, skip_deserializing)]
+    other: Other,
+}
+
+#[derive(Deserialize)]
+struct Other {
+    x: u32,
+}
+
+fn main() {}

test_suite/tests/ui/conflict/flatten-skip-deserializing.stderr

@@ -0,0 +1,8 @@
+error: #[serde(flatten] can not be combined with #[serde(skip_deserializing)]
+  --> $DIR/flatten-skip-deserializing.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/conflict/flatten-skip-serializing-if.rs

@@ -0,0 +1,23 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct Foo {
+    #[serde(flatten, skip_serializing_if = "Option::is_none")]
+    other: Option<Other>,
+}
+
+#[derive(Serialize)]
+struct Other {
+    x: u32,
+}
+
+fn main() {}

test_suite/tests/ui/conflict/flatten-skip-serializing-if.stderr

@@ -0,0 +1,8 @@
+error: #[serde(flatten] can not be combined with #[serde(skip_serializing_if = "...")]
+  --> $DIR/flatten-skip-serializing-if.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/conflict/flatten-skip-serializing.rs

@@ -0,0 +1,23 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct Foo {
+    #[serde(flatten, skip_serializing)]
+    other: Other,
+}
+
+#[derive(Serialize)]
+struct Other {
+    x: u32,
+}
+
+fn main() {}

test_suite/tests/ui/conflict/flatten-skip-serializing.stderr

@@ -0,0 +1,8 @@
+error: #[serde(flatten] can not be combined with #[serde(skip_serializing)]
+  --> $DIR/flatten-skip-serializing.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/conflict/flatten-tuple-struct.rs

@@ -0,0 +1,15 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct Foo(u32, #[serde(flatten)] HashMap<String, String>);
+
+fn main() {}

test_suite/tests/ui/conflict/flatten-tuple-struct.stderr

@@ -0,0 +1,8 @@
+error: #[serde(flatten)] cannot be used on tuple structs
+  --> $DIR/flatten-tuple-struct.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/conflict/internal-tag.rs

@@ -0,0 +1,21 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+#[serde(tag = "conflict")]
+enum E {
+    A {
+        #[serde(rename = "conflict")]
+        x: (),
+    },
+}
+
+fn main() {}

test_suite/tests/ui/conflict/internal-tag.stderr

@@ -0,0 +1,8 @@
+error: variant field name `conflict` conflicts with internal tag
+  --> $DIR/internal-tag.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/default-attribute/enum.rs

@@ -0,0 +1,16 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(default)]
+enum E {
+    S { f: u8 },
+}

test_suite/tests/ui/default-attribute/enum.stderr

@@ -0,0 +1,8 @@
+error: #[serde(default)] can only be used on structs with named fields
+  --> $DIR/enum.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/default-attribute/nameless_struct_fields.rs

@@ -0,0 +1,16 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(default)]
+struct T(u8, u8);
+
+fn main() {}

test_suite/tests/ui/default-attribute/nameless_struct_fields.stderr

@@ -0,0 +1,8 @@
+error: #[serde(default)] can only be used on structs with named fields
+  --> $DIR/nameless_struct_fields.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/duplicate-attribute/rename-and-ser.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct S {
+    #[serde(rename = "x", serialize = "y")]
+    x: (),
+}
+
+fn main() {}

test_suite/tests/ui/duplicate-attribute/rename-and-ser.stderr

@@ -0,0 +1,8 @@
+error: unknown serde field attribute `serialize`
+  --> $DIR/rename-and-ser.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/duplicate-attribute/rename-rename-de.rs

@@ -0,0 +1,19 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct S {
+    #[serde(rename = "x")]
+    #[serde(rename(deserialize = "y"))]
+    x: (),
+}
+
+fn main() {}

test_suite/tests/ui/duplicate-attribute/rename-rename-de.stderr

@@ -0,0 +1,8 @@
+error: duplicate serde attribute `rename`
+  --> $DIR/rename-rename-de.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/duplicate-attribute/rename-ser-rename-ser.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct S {
+    #[serde(rename(serialize = "x"), rename(serialize = "y"))]
+    x: (),
+}
+
+fn main() {}

test_suite/tests/ui/duplicate-attribute/rename-ser-rename-ser.stderr

@@ -0,0 +1,8 @@
+error: duplicate serde attribute `rename`
+  --> $DIR/rename-ser-rename-ser.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/duplicate-attribute/rename-ser-rename.rs

@@ -0,0 +1,19 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct S {
+    #[serde(rename(serialize = "x"))]
+    #[serde(rename = "y")]
+    x: (),
+}
+
+fn main() {}

test_suite/tests/ui/duplicate-attribute/rename-ser-rename.stderr

@@ -0,0 +1,8 @@
+error: duplicate serde attribute `rename`
+  --> $DIR/rename-ser-rename.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/duplicate-attribute/rename-ser-ser.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct S {
+    #[serde(rename(serialize = "x", serialize = "y"))]
+    x: (),
+}
+
+fn main() {}

test_suite/tests/ui/duplicate-attribute/rename-ser-ser.stderr

@@ -0,0 +1,8 @@
+error: duplicate serde attribute `rename`
+  --> $DIR/rename-ser-ser.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/duplicate-attribute/two-rename-ser.rs

@@ -0,0 +1,19 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct S {
+    #[serde(rename(serialize = "x"))]
+    #[serde(rename(serialize = "y"))]
+    x: (),
+}
+
+fn main() {}

test_suite/tests/ui/duplicate-attribute/two-rename-ser.stderr

@@ -0,0 +1,8 @@
+error: duplicate serde attribute `rename`
+  --> $DIR/two-rename-ser.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/duplicate-attribute/with-and-serialize-with.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct S {
+    #[serde(with = "w", serialize_with = "s")]
+    x: (),
+}
+
+fn main() {}

test_suite/tests/ui/duplicate-attribute/with-and-serialize-with.stderr

@@ -0,0 +1,8 @@
+error: duplicate serde attribute `serialize_with`
+  --> $DIR/with-and-serialize-with.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/enum-representation/internal-tuple-variant.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+#[serde(tag = "type")]
+enum E {
+    Tuple(u8, u8),
+}
+
+fn main() {}

test_suite/tests/ui/enum-representation/internal-tuple-variant.stderr

@@ -0,0 +1,8 @@
+error: #[serde(tag = "...")] cannot be used with tuple variants
+  --> $DIR/internal-tuple-variant.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/enum-representation/internally-tagged-struct.rs

@@ -0,0 +1,16 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+#[serde(tag = "type")]
+struct S;
+
+fn main() {}

test_suite/tests/ui/enum-representation/internally-tagged-struct.stderr

@@ -0,0 +1,8 @@
+error: #[serde(tag = "...")] can only be used on enums
+  --> $DIR/internally-tagged-struct.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/enum-representation/untagged-and-internal.rs

@@ -0,0 +1,20 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+#[serde(untagged)]
+#[serde(tag = "type")]
+enum E {
+    A(u8),
+    B(String),
+}
+
+fn main() {}

test_suite/tests/ui/enum-representation/untagged-and-internal.stderr

@@ -0,0 +1,8 @@
+error: enum cannot be both untagged and internally tagged
+  --> $DIR/untagged-and-internal.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/enum-representation/untagged-struct.rs

@@ -0,0 +1,16 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+#[serde(untagged)]
+struct S;
+
+fn main() {}

test_suite/tests/ui/enum-representation/untagged-struct.stderr

@@ -0,0 +1,8 @@
+error: #[serde(untagged)] can only be used on enums
+  --> $DIR/untagged-struct.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/identifier/both.rs

@@ -0,0 +1,19 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(field_identifier, variant_identifier)]
+enum F {
+    A,
+    B,
+}
+
+fn main() {}

test_suite/tests/ui/identifier/both.stderr

@@ -0,0 +1,8 @@
+error: `field_identifier` and `variant_identifier` cannot both be set
+  --> $DIR/both.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/identifier/field_struct.rs

@@ -0,0 +1,16 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(field_identifier)]
+struct S;
+
+fn main() {}

test_suite/tests/ui/identifier/field_struct.stderr

@@ -0,0 +1,8 @@
+error: `field_identifier` can only be used on an enum
+  --> $DIR/field_struct.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/identifier/field_tuple.rs

@@ -0,0 +1,19 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(field_identifier)]
+enum F {
+    A,
+    B(u8, u8),
+}
+
+fn main() {}

test_suite/tests/ui/identifier/field_tuple.stderr

@@ -0,0 +1,8 @@
+error: field_identifier may only contain unit variants
+  --> $DIR/field_tuple.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/identifier/newtype_not_last.rs

@@ -0,0 +1,20 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(field_identifier)]
+enum F {
+    A,
+    Other(String),
+    B,
+}
+
+fn main() {}

test_suite/tests/ui/identifier/newtype_not_last.stderr

@@ -0,0 +1,8 @@
+error: `Other` must be the last variant
+  --> $DIR/newtype_not_last.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/identifier/not_unit.rs

@@ -0,0 +1,20 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(field_identifier)]
+enum F {
+    A,
+    #[serde(other)]
+    Other(u8, u8),
+}
+
+fn main() {}

test_suite/tests/ui/identifier/not_unit.stderr

@@ -0,0 +1,8 @@
+error: #[serde(other)] must be on a unit variant
+  --> $DIR/not_unit.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/identifier/other_not_last.rs

@@ -0,0 +1,21 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(field_identifier)]
+enum F {
+    A,
+    #[serde(other)]
+    Other,
+    B,
+}
+
+fn main() {}

test_suite/tests/ui/identifier/other_not_last.stderr

@@ -0,0 +1,8 @@
+error: #[serde(other)] must be the last variant
+  --> $DIR/other_not_last.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/identifier/serialize.rs

@@ -0,0 +1,19 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+#[serde(field_identifier)]
+enum F {
+    A,
+    B,
+}
+
+fn main() {}

test_suite/tests/ui/identifier/serialize.stderr

@@ -0,0 +1,8 @@
+error: field identifiers cannot be serialized
+  --> $DIR/serialize.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/identifier/variant_struct.rs

@@ -0,0 +1,16 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(variant_identifier)]
+struct S;
+
+fn main() {}

test_suite/tests/ui/identifier/variant_struct.stderr

@@ -0,0 +1,8 @@
+error: `variant_identifier` can only be used on an enum
+  --> $DIR/variant_struct.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/identifier/variant_tuple.rs

@@ -0,0 +1,19 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(variant_identifier)]
+enum F {
+    A,
+    B(u8, u8),
+}
+
+fn main() {}

test_suite/tests/ui/identifier/variant_tuple.stderr

@@ -0,0 +1,8 @@
+error: variant_identifier may only contain unit variants
+  --> $DIR/variant_tuple.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/precondition/deserialize_de_lifetime.rs

@@ -0,0 +1,15 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct S<'de> {
+    s: &'de str,
+}

test_suite/tests/ui/precondition/deserialize_de_lifetime.stderr

@@ -0,0 +1,8 @@
+error: cannot deserialize when there is a lifetime parameter called 'de
+  --> $DIR/deserialize_de_lifetime.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/precondition/deserialize_dst.rs

@@ -0,0 +1,16 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+struct S {
+    string: String,
+    slice: [u8],
+}

test_suite/tests/ui/precondition/deserialize_dst.stderr

@@ -0,0 +1,8 @@
+error: cannot deserialize a dynamically sized struct
+  --> $DIR/deserialize_dst.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/remote/bad_getter.rs

@@ -0,0 +1,25 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+mod remote {
+    pub struct S {
+        a: u8,
+    }
+}
+
+#[derive(Serialize)]
+#[serde(remote = "remote::S")]
+struct S {
+    #[serde(getter = "~~~")]
+    a: u8,
+}
+
+fn main() {}

test_suite/tests/ui/remote/bad_getter.stderr

@@ -0,0 +1,8 @@
+error: failed to parse path: "~~~"
+  --> $DIR/bad_getter.rs:18:10
+   |
+18 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/remote/bad_remote.rs

@@ -0,0 +1,24 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+mod remote {
+    pub struct S {
+        a: u8,
+    }
+}
+
+#[derive(Serialize)]
+#[serde(remote = "~~~")]
+struct S {
+    a: u8,
+}
+
+fn main() {}

test_suite/tests/ui/remote/bad_remote.stderr

@@ -0,0 +1,8 @@
+error: failed to parse path: "~~~"
+  --> $DIR/bad_remote.rs:18:10
+   |
+18 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/remote/enum_getter.rs

@@ -0,0 +1,27 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+mod remote {
+    pub enum E {
+        A { a: u8 },
+    }
+}
+
+#[derive(Serialize)]
+#[serde(remote = "remote::E")]
+pub enum E {
+    A {
+        #[serde(getter = "get_a")]
+        a: u8,
+    },
+}
+
+fn main() {}

test_suite/tests/ui/remote/enum_getter.stderr

@@ -0,0 +1,8 @@
+error: #[serde(getter = "...")] is not allowed in an enum
+  --> $DIR/enum_getter.rs:18:10
+   |
+18 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/remote/missing_field.rs

@@ -0,0 +1,25 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+mod remote {
+    pub struct S {
+        pub a: u8,
+        pub b: u8,
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+#[serde(remote = "remote::S")]
+struct S {
+    a: u8,
+}
+
+fn main() {}

test_suite/tests/ui/remote/missing_field.stderr

@@ -0,0 +1,9 @@
+error[E0063]: missing field `b` in initializer of `remote::S`
+  --> $DIR/missing_field.rs:20:18
+   |
+20 | #[serde(remote = "remote::S")]
+   |                  ^^^^^^^^^^^ missing `b`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0063`.

test_suite/tests/ui/remote/nonremote_getter.rs

@@ -0,0 +1,24 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+struct S {
+    #[serde(getter = "S::get")]
+    a: u8,
+}
+
+impl S {
+    fn get(&self) -> u8 {
+        self.a
+    }
+}
+
+fn main() {}

test_suite/tests/ui/remote/nonremote_getter.stderr

@@ -0,0 +1,8 @@
+error: #[serde(getter = "...")] can only be used in structs that have #[serde(remote = "...")]
+  --> $DIR/nonremote_getter.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/remote/unknown_field.rs

@@ -0,0 +1,24 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+mod remote {
+    pub struct S {
+        pub a: u8,
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+#[serde(remote = "remote::S")]
+struct S {
+    b: u8,
+}
+
+fn main() {}

test_suite/tests/ui/remote/unknown_field.stderr

@@ -0,0 +1,16 @@
+error[E0609]: no field `b` on type `&remote::S`
+  --> $DIR/unknown_field.rs:21:5
+   |
+21 |     b: u8,
+   |     ^
+
+error[E0560]: struct `remote::S` has no field named `b`
+  --> $DIR/unknown_field.rs:21:5
+   |
+21 |     b: u8,
+   |     ^ field does not exist - did you mean `a`?
+
+error: aborting due to 2 previous errors
+
+Some errors occurred: E0560, E0609.
+For more information about an error, try `rustc --explain E0560`.

test_suite/tests/ui/remote/wrong_de.rs

@@ -0,0 +1,20 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+mod remote {
+    pub struct S(pub u16);
+}
+
+#[derive(Deserialize)]
+#[serde(remote = "remote::S")]
+struct S(u8);
+
+fn main() {}

test_suite/tests/ui/remote/wrong_de.stderr

@@ -0,0 +1,13 @@
+error[E0308]: mismatched types
+  --> $DIR/wrong_de.rs:16:10
+   |
+16 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^ expected u16, found u8
+help: you can cast an `u8` to `u16`, which will zero-extend the source value
+   |
+16 | #[derive(Deserialize.into())]
+   |          ^^^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.

test_suite/tests/ui/remote/wrong_getter.rs

@@ -0,0 +1,31 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+mod remote {
+    pub struct S {
+        a: u8,
+    }
+
+    impl S {
+        pub fn get(&self) -> u16 {
+            self.a as u16
+        }
+    }
+}
+
+#[derive(Serialize)]
+#[serde(remote = "remote::S")]
+struct S {
+    #[serde(getter = "remote::S::get")]
+    a: u8,
+}
+
+fn main() {}

test_suite/tests/ui/remote/wrong_getter.stderr

@@ -0,0 +1,12 @@
+error[E0308]: mismatched types
+  --> $DIR/wrong_getter.rs:24:10
+   |
+24 | #[derive(Serialize)]
+   |          ^^^^^^^^^ expected u8, found u16
+   |
+   = note: expected type `&u8`
+              found type `&u16`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.

test_suite/tests/ui/remote/wrong_ser.rs

@@ -0,0 +1,24 @@
+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+mod remote {
+    pub struct S {
+        pub a: u16,
+    }
+}
+
+#[derive(Serialize)]
+#[serde(remote = "remote::S")]
+struct S {
+    a: u8,
+}
+
+fn main() {}

test_suite/tests/ui/remote/wrong_ser.stderr

@@ -0,0 +1,12 @@
+error[E0308]: mismatched types
+  --> $DIR/wrong_ser.rs:18:10
+   |
+18 | #[derive(Serialize)]
+   |          ^^^^^^^^^ expected u8, found u16
+   |
+   = note: expected type `&u8`
+              found type `&u16`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.

test_suite/tests/ui/transparent/at_most_one.rs

@@ -0,0 +1,19 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+#[serde(transparent)]
+struct S {
+    a: u8,
+    b: u8,
+}
+
+fn main() {}

test_suite/tests/ui/transparent/at_most_one.stderr

@@ -0,0 +1,8 @@
+error: #[serde(transparent)] requires struct to have at most one transparent field
+  --> $DIR/at_most_one.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/transparent/de_at_least_one.rs

@@ -0,0 +1,21 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Deserialize)]
+#[serde(transparent)]
+struct S {
+    #[serde(skip)]
+    a: u8,
+    #[serde(default)]
+    b: u8,
+}
+
+fn main() {}

test_suite/tests/ui/transparent/de_at_least_one.stderr

@@ -0,0 +1,8 @@
+error: #[serde(transparent)] requires at least one field that is neither skipped nor has a default
+  --> $DIR/de_at_least_one.rs:12:10
+   |
+12 | #[derive(Deserialize)]
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+

test_suite/tests/ui/transparent/ser_at_least_one.rs

@@ -0,0 +1,19 @@
+// Copyright 2018 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://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 serde_derive;
+
+#[derive(Serialize)]
+#[serde(transparent)]
+struct S {
+    #[serde(skip)]
+    a: u8,
+}
+
+fn main() {}

test_suite/tests/ui/transparent/ser_at_least_one.stderr

@@ -0,0 +1,8 @@
+error: #[serde(transparent)] requires at least one field that is not skipped
+  --> $DIR/ser_at_least_one.rs:12:10
+   |
+12 | #[derive(Serialize)]
+   |          ^^^^^^^^^
+
+error: aborting due to previous error
+