--- /dev/null
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// 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.
+
+#![deny(missing_doc_code_examples)]
+
+/// Some docs.
+pub struct Foo;
+
+/// And then, the princess died.
+pub mod foo {
+ /// Or maybe not because she saved herself!
+ pub fn bar() {}
+}
--- /dev/null
+error: Missing code example in this documentation
+ |
+note: lint level defined here
+ --> $DIR/doc-without-codeblock.rs:11:9
+ |
+LL | #![deny(missing_doc_code_examples)]
+ | ^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: Missing code example in this documentation
+ --> $DIR/doc-without-codeblock.rs:13:1
+ |
+LL | /// Some docs.
+ | ^^^^^^^^^^^^^^
+
+error: Missing code example in this documentation
+ --> $DIR/doc-without-codeblock.rs:16:1
+ |
+LL | /// And then, the princess died.
+ | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: Missing code example in this documentation
+ --> $DIR/doc-without-codeblock.rs:18:5
+ |
+LL | /// Or maybe not because she saved herself!
+ | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+