error: doc alias attribute expects a string `#[doc(alias = "a")]` or a list of strings `#[doc(alias("a", "b"))]`
  --> $DIR/check-doc-alias-attr.rs:7:7
   |
LL | #[doc(alias)]
   |       ^^^^^

error: doc alias attribute expects a string `#[doc(alias = "a")]` or a list of strings `#[doc(alias("a", "b"))]`
  --> $DIR/check-doc-alias-attr.rs:8:7
   |
LL | #[doc(alias = 0)]
   |       ^^^^^^^^^

error: '"' character isn't allowed in `#[doc(alias = "...")]`
  --> $DIR/check-doc-alias-attr.rs:9:15
   |
LL | #[doc(alias = "\"")]
   |               ^^^^

error: '\n' character isn't allowed in `#[doc(alias = "...")]`
  --> $DIR/check-doc-alias-attr.rs:10:15
   |
LL | #[doc(alias = "\n")]
   |               ^^^^

error: '\n' character isn't allowed in `#[doc(alias = "...")]`
  --> $DIR/check-doc-alias-attr.rs:11:15
   |
LL |   #[doc(alias = "
   |  _______________^
LL | | ")]
   | |_^

error: '\t' character isn't allowed in `#[doc(alias = "...")]`
  --> $DIR/check-doc-alias-attr.rs:13:15
   |
LL | #[doc(alias = "\t")]
   |               ^^^^

error: `#[doc(alias = "...")]` cannot start or end with ' '
  --> $DIR/check-doc-alias-attr.rs:14:15
   |
LL | #[doc(alias = " hello")]
   |               ^^^^^^^^

error: `#[doc(alias = "...")]` cannot start or end with ' '
  --> $DIR/check-doc-alias-attr.rs:15:15
   |
LL | #[doc(alias = "hello ")]
   |               ^^^^^^^^

error: `#[doc(alias = "...")]` attribute cannot have empty value
  --> $DIR/check-doc-alias-attr.rs:16:15
   |
LL | #[doc(alias = "")]
   |               ^^

error: `#[doc(alias("a"))]` expects string literals
  --> $DIR/check-doc-alias-attr.rs:19:13
   |
LL | #[doc(alias(0))]
   |             ^

error: '"' character isn't allowed in `#[doc(alias("..."))]`
  --> $DIR/check-doc-alias-attr.rs:20:13
   |
LL | #[doc(alias("\""))]
   |             ^^^^

error: '\n' character isn't allowed in `#[doc(alias("..."))]`
  --> $DIR/check-doc-alias-attr.rs:21:13
   |
LL | #[doc(alias("\n"))]
   |             ^^^^

error: '\n' character isn't allowed in `#[doc(alias("..."))]`
  --> $DIR/check-doc-alias-attr.rs:22:13
   |
LL |   #[doc(alias("
   |  _____________^
LL | | "))]
   | |_^

error: '\t' character isn't allowed in `#[doc(alias("..."))]`
  --> $DIR/check-doc-alias-attr.rs:24:13
   |
LL | #[doc(alias("\t"))]
   |             ^^^^

error: `#[doc(alias("..."))]` cannot start or end with ' '
  --> $DIR/check-doc-alias-attr.rs:25:13
   |
LL | #[doc(alias(" hello"))]
   |             ^^^^^^^^

error: `#[doc(alias("..."))]` cannot start or end with ' '
  --> $DIR/check-doc-alias-attr.rs:26:13
   |
LL | #[doc(alias("hello "))]
   |             ^^^^^^^^

error: `#[doc(alias("..."))]` attribute cannot have empty value
  --> $DIR/check-doc-alias-attr.rs:27:13
   |
LL | #[doc(alias(""))]
   |             ^^

error: aborting due to 17 previous errors