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/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
+