2 files changed, 32 insertions, 0 deletions
diff --git a/src/test/rustdoc-ui/invalid-syntax.rs b/src/test/rustdoc-ui/invalid-syntax.rs
index 2b02d47d4b8..3ef66e273d0 100644
--- a/src/test/rustdoc-ui/invalid-syntax.rs
+++ b/src/test/rustdoc-ui/invalid-syntax.rs
@@ -64,3 +64,13 @@ pub fn blargh() {}
 /// \_
 #[doc = "```"]
 pub fn crazy_attrs() {}
+
+/// ```rust
+/// ```
+pub fn empty_rust() {}
+
+/// ```
+///
+///
+/// ```
+pub fn empty_rust_with_whitespace() {}
diff --git a/src/test/rustdoc-ui/invalid-syntax.stderr b/src/test/rustdoc-ui/invalid-syntax.stderr
index 3bebbecb9df..36209e29277 100644
--- a/src/test/rustdoc-ui/invalid-syntax.stderr
+++ b/src/test/rustdoc-ui/invalid-syntax.stderr
@@ -179,6 +179,28 @@ LL | | #[doc = "```"]
    |
    = help: mark blocks that do not contain Rust code as text: ```text
 
+warning: Rust code block is empty
+  --> $DIR/invalid-syntax.rs:68:5
+   |
+LL |   /// ```rust
+   |  _____^
+LL | | /// ```
+   | |_______^
+
+warning: Rust code block is empty
+  --> $DIR/invalid-syntax.rs:72:5
+   |
+LL |   /// ```
+   |  _____^
+LL | | ///
+LL | | ///
+LL | | /// ```
+   | |_______^
+help: mark blocks that do not contain Rust code as text
+   |
+LL | /// ```text
+   |     ^^^^^^^
+
 error: unknown start of token: \
  --> <rustdoc-highlighting>:1:1
   |