Fix deny(invalid_doc_attributes)

compiler/rustc_lint_defs/src/builtin.rs

@@ -2994,6 +2994,7 @@ declare_lint_pass! {
         USELESS_DEPRECATED,
         UNSUPPORTED_NAKED_FUNCTIONS,
         MISSING_ABI,
+        INVALID_DOC_ATTRIBUTES,
         SEMICOLON_IN_EXPRESSIONS_FROM_MACROS,
         DISJOINT_CAPTURE_MIGRATION,
         LEGACY_DERIVE_HELPERS,

src/librustdoc/core.rs

@@ -217,8 +217,9 @@ crate fn create_config(
     // By default, rustdoc ignores all lints.
     // Specifically unblock lints relevant to documentation or the lint machinery itself.
     let mut lints_to_show = vec![
-        // it's unclear whether this should be part of rustdoc directly (#77364)
+        // it's unclear whether these should be part of rustdoc directly (#77364)
         rustc_lint::builtin::MISSING_DOCS.name.to_string(),
+        rustc_lint::builtin::INVALID_DOC_ATTRIBUTES.name.to_string(),
         // these are definitely not part of rustdoc, but we want to warn on them anyway.
         rustc_lint::builtin::RENAMED_AND_REMOVED_LINTS.name.to_string(),
         rustc_lint::builtin::UNKNOWN_LINTS.name.to_string(),

src/test/rustdoc-ui/doc-spotlight.fixed

@@ -1,9 +1,8 @@
-// check-pass
 // run-rustfix
-
+#![deny(warnings)]
 #![feature(doc_notable_trait)]
 
 #[doc(notable_trait)]
-//~^ WARN unknown `doc` attribute `spotlight`
+//~^ ERROR unknown `doc` attribute `spotlight`
 //~| WARN this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
 trait MyTrait {}

src/test/rustdoc-ui/doc-spotlight.rs

@@ -1,9 +1,8 @@
-// check-pass
 // run-rustfix
-
+#![deny(warnings)]
 #![feature(doc_notable_trait)]
 
 #[doc(spotlight)]
-//~^ WARN unknown `doc` attribute `spotlight`
+//~^ ERROR unknown `doc` attribute `spotlight`
 //~| WARN this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
 trait MyTrait {}

src/test/rustdoc-ui/doc-spotlight.stderr

@@ -1,14 +1,19 @@
-warning: unknown `doc` attribute `spotlight`
+error: unknown `doc` attribute `spotlight`
-  --> $DIR/doc-spotlight.rs:6:7
+  --> $DIR/doc-spotlight.rs:5:7
    |
 LL | #[doc(spotlight)]
    |       ^^^^^^^^^ help: use `notable_trait` instead
    |
-   = note: `#[warn(invalid_doc_attributes)]` on by default
+note: the lint level is defined here
+  --> $DIR/doc-spotlight.rs:2:9
+   |
+LL | #![deny(warnings)]
+   |         ^^^^^^^^
+   = note: `#[deny(invalid_doc_attributes)]` implied by `#[deny(warnings)]`
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
    = note: `doc(spotlight)` was renamed to `doc(notable_trait)`
    = note: `doc(spotlight)` is now a no-op
 
-warning: 1 warning emitted
+error: aborting due to previous error
 

src/test/ui/rustdoc/deny-invalid-doc-attrs.rs

@@ -0,0 +1,7 @@
+#![deny(invalid_doc_attributes)]
+//~^ NOTE defined here
+#![doc(x)]
+//~^ ERROR unknown `doc` attribute `x`
+//~| WARNING will become a hard error
+//~| NOTE see issue #82730
+fn main() {}

src/test/ui/rustdoc/deny-invalid-doc-attrs.stderr

@@ -0,0 +1,16 @@
+error: unknown `doc` attribute `x`
+  --> $DIR/deny-invalid-doc-attrs.rs:3:8
+   |
+LL | #![doc(x)]
+   |        ^
+   |
+note: the lint level is defined here
+  --> $DIR/deny-invalid-doc-attrs.rs:1:9
+   |
+LL | #![deny(invalid_doc_attributes)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
+
+error: aborting due to previous error
+