Rollup merge of #151255 - fix-rustdoc-ice-reexported-deprecated-note, r=lolbinarycat

rustdoc: Fix ICE when deprecated note is not resolved on the correct `DefId`

Supersedes https://github.com/rust-lang/rust/pull/151237.
Follow-up of rust-lang/rust#151120.

The `span` overlapping approach wasn't good enough so instead we now check if the reexport itself has the `deprecated` attribute, and if so, we resolve the path to the reexport `DefId`, otherwise we resolve it on the reexported item's `DefId`.

cc @Zalathar
r? @lolbinarycat

src/librustdoc/passes/collect_intra_doc_links.rs

@@ -11,10 +11,11 @@ use rustc_ast::util::comments::may_have_doc_links;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap, FxIndexSet};
 use rustc_data_structures::intern::Interned;
 use rustc_errors::{Applicability, Diag, DiagMessage};
+use rustc_hir::attrs::AttributeKind;
 use rustc_hir::def::Namespace::*;
 use rustc_hir::def::{DefKind, MacroKinds, Namespace, PerNS};
 use rustc_hir::def_id::{CRATE_DEF_ID, DefId, LOCAL_CRATE};
-use rustc_hir::{Mutability, Safety};
+use rustc_hir::{Attribute, Mutability, Safety};
 use rustc_middle::ty::{Ty, TyCtxt};
 use rustc_middle::{bug, span_bug, ty};
 use rustc_resolve::rustdoc::pulldown_cmark::LinkType;
@@ -1108,10 +1109,8 @@ impl LinkCollector<'_, '_> {
 
         // Also resolve links in the note text of `#[deprecated]`.
         for attr in &item.attrs.other_attrs {
-            let rustc_hir::Attribute::Parsed(rustc_hir::attrs::AttributeKind::Deprecation {
-                span,
-                deprecation,
-            }) = attr
+            let Attribute::Parsed(AttributeKind::Deprecation { span: depr_span, deprecation }) =
+                attr
             else {
                 continue;
             };
@@ -1128,8 +1127,14 @@ impl LinkCollector<'_, '_> {
             // inlined item.
             // <https://github.com/rust-lang/rust/pull/151120>
             let item_id = if let Some(inline_stmt_id) = item.inline_stmt_id
-                && item.span(tcx).is_none_or(|item_span| !item_span.inner().contains(*span))
-            {
+                && tcx.get_all_attrs(inline_stmt_id).iter().any(|attr| {
+                    matches!(
+                        attr,
+                        Attribute::Parsed(AttributeKind::Deprecation {
+                            span: attr_span, ..
+                        }) if attr_span == depr_span,
+                    )
+                }) {
                 inline_stmt_id.to_def_id()
             } else {
                 item.item_id.expect_def_id()

tests/rustdoc-ui/intra-doc/deprecated-note-from-reexported.rs

@@ -0,0 +1,16 @@
+// This test ensures that the intra-doc link from reexported deprecated attribute note
+// are resolved where they are declared.
+
+#![deny(rustdoc::broken_intra_doc_links)]
+
+#[doc(inline)]
+pub use bar::sql_function_proc as sql_function;
+
+pub fn define_sql_function() {}
+
+pub mod bar {
+    #[deprecated(note = "Use [`define_sql_function`] instead")]
+    //~^ ERROR: unresolved link
+    //~| ERROR: unresolved link
+    pub fn sql_function_proc() {}
+}

tests/rustdoc-ui/intra-doc/deprecated-note-from-reexported.stderr

@@ -0,0 +1,34 @@
+error: unresolved link to `define_sql_function`
+  --> $DIR/deprecated-note-from-reexported.rs:12:25
+   |
+LL |     #[deprecated(note = "Use [`define_sql_function`] instead")]
+   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: the link appears in this line:
+           
+           Use [`define_sql_function`] instead
+                ^^^^^^^^^^^^^^^^^^^^^
+   = note: no item named `define_sql_function` in scope
+   = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
+note: the lint level is defined here
+  --> $DIR/deprecated-note-from-reexported.rs:4:9
+   |
+LL | #![deny(rustdoc::broken_intra_doc_links)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: unresolved link to `define_sql_function`
+  --> $DIR/deprecated-note-from-reexported.rs:12:25
+   |
+LL |     #[deprecated(note = "Use [`define_sql_function`] instead")]
+   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: the link appears in this line:
+           
+           Use [`define_sql_function`] instead
+                ^^^^^^^^^^^^^^^^^^^^^
+   = note: no item named `define_sql_function` in scope
+   = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
+
+error: aborting due to 2 previous errors
+