4 files changed, 30 insertions, 2 deletions
diff --git a/src/test/rustdoc-ui/check-doc-alias-attr.rs b/src/test/rustdoc-ui/check-doc-alias-attr.rs
index d55be9f120c..0ca2349a43b 100644
--- a/src/test/rustdoc-ui/check-doc-alias-attr.rs
+++ b/src/test/rustdoc-ui/check-doc-alias-attr.rs
@@ -12,4 +12,6 @@ pub struct Bar;
 #[doc(alias = "
 ")] //~^ ERROR
 #[doc(alias = "\t")] //~ ERROR
+#[doc(alias = " hello")] //~ ERROR
+#[doc(alias = "hello ")] //~ ERROR
 pub struct Foo;
diff --git a/src/test/rustdoc-ui/check-doc-alias-attr.stderr b/src/test/rustdoc-ui/check-doc-alias-attr.stderr
index 97444c69ff1..2c417a3bb65 100644
--- a/src/test/rustdoc-ui/check-doc-alias-attr.stderr
+++ b/src/test/rustdoc-ui/check-doc-alias-attr.stderr
@@ -42,5 +42,17 @@ error: '\t' character isn't allowed in `#[doc(alias = "...")]`
 LL | #[doc(alias = "\t")]
    |       ^^^^^^^^^^^^
 
-error: aborting due to 7 previous errors
+error: `#[doc(alias = "...")]` cannot start or end with ' '
+  --> $DIR/check-doc-alias-attr.rs:15:7
+   |
+LL | #[doc(alias = " hello")]
+   |       ^^^^^^^^^^^^^^^^
+
+error: `#[doc(alias = "...")]` cannot start or end with ' '
+  --> $DIR/check-doc-alias-attr.rs:16:7
+   |
+LL | #[doc(alias = "hello ")]
+   |       ^^^^^^^^^^^^^^^^
+
+error: aborting due to 9 previous errors
 
diff --git a/src/test/ui/check-doc-alias-attr.rs b/src/test/ui/check-doc-alias-attr.rs
index d55be9f120c..0ca2349a43b 100644
--- a/src/test/ui/check-doc-alias-attr.rs
+++ b/src/test/ui/check-doc-alias-attr.rs
@@ -12,4 +12,6 @@ pub struct Bar;
 #[doc(alias = "
 ")] //~^ ERROR
 #[doc(alias = "\t")] //~ ERROR
+#[doc(alias = " hello")] //~ ERROR
+#[doc(alias = "hello ")] //~ ERROR
 pub struct Foo;
diff --git a/src/test/ui/check-doc-alias-attr.stderr b/src/test/ui/check-doc-alias-attr.stderr
index 97444c69ff1..2c417a3bb65 100644
--- a/src/test/ui/check-doc-alias-attr.stderr
+++ b/src/test/ui/check-doc-alias-attr.stderr
@@ -42,5 +42,17 @@ error: '\t' character isn't allowed in `#[doc(alias = "...")]`
 LL | #[doc(alias = "\t")]
    |       ^^^^^^^^^^^^
 
-error: aborting due to 7 previous errors
+error: `#[doc(alias = "...")]` cannot start or end with ' '
+  --> $DIR/check-doc-alias-attr.rs:15:7
+   |
+LL | #[doc(alias = " hello")]
+   |       ^^^^^^^^^^^^^^^^
+
+error: `#[doc(alias = "...")]` cannot start or end with ' '
+  --> $DIR/check-doc-alias-attr.rs:16:7
+   |
+LL | #[doc(alias = "hello ")]
+   |       ^^^^^^^^^^^^^^^^
+
+error: aborting due to 9 previous errors