From 49ae52e3ffeb3d98f19845eba5eb9fa1408fa432 Mon Sep 17 00:00:00 2001
From: Jonathan Brouwer <jonathantbrouwer@gmail.com>
Date: Thu, 17 Jul 2025 08:02:26 +0200
Subject: [PATCH 1/2] Fix encoding of `link_section` and `no_mangle` cross
 crate

---
 .../rustc_attr_data_structures/src/encode_cross_crate.rs  | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs b/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs
index 3e2dc0a15b2f3..c24b45e83f907 100644
--- a/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs
+++ b/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs
@@ -40,9 +40,9 @@ impl AttributeKind {
             Fundamental { .. } => Yes,
             Ignore { .. } => No,
             Inline(..) => No,
-            LinkName { .. } => Yes,
+            LinkName { .. } => Yes, // Needed for rustdoc
             LinkOrdinal { .. } => No,
-            LinkSection { .. } => No,
+            LinkSection { .. } => Yes, // Needed for rustdoc
             LoopMatch(..) => No,
             MacroTransparency(..) => Yes,
             Marker(..) => No,
@@ -50,8 +50,8 @@ impl AttributeKind {
             MustUse { .. } => Yes,
             Naked(..) => No,
             NoImplicitPrelude(..) => No,
-            NoMangle(..) => No,
-            NonExhaustive(..) => Yes,
+            NoMangle(..) => Yes,      // Needed for rustdoc
+            NonExhaustive(..) => Yes, // Needed for rustdoc
             OmitGdbPrettyPrinterSection => No,
             Optimize(..) => No,
             ParenSugar(..) => No,

From 9f16db6611b0fb35f4a16dcbf326fb9aee3d87f3 Mon Sep 17 00:00:00 2001
From: Jonathan Brouwer <jonathantbrouwer@gmail.com>
Date: Thu, 17 Jul 2025 08:03:17 +0200
Subject: [PATCH 2/2] Regression test

---
 .../reexport/auxiliary/reexports-attrs.rs     | 14 +++++++++++++
 tests/rustdoc/reexport/reexport-attrs.rs      | 20 +++++++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 tests/rustdoc/reexport/auxiliary/reexports-attrs.rs
 create mode 100644 tests/rustdoc/reexport/reexport-attrs.rs

diff --git a/tests/rustdoc/reexport/auxiliary/reexports-attrs.rs b/tests/rustdoc/reexport/auxiliary/reexports-attrs.rs
new file mode 100644
index 0000000000000..96fa8209cde84
--- /dev/null
+++ b/tests/rustdoc/reexport/auxiliary/reexports-attrs.rs
@@ -0,0 +1,14 @@
+#[unsafe(no_mangle)]
+pub fn f0() {}
+
+#[unsafe(link_section = ".here")]
+pub fn f1() {}
+
+#[unsafe(export_name = "f2export")]
+pub fn f2() {}
+
+#[repr(u8)]
+pub enum T0 { V1 }
+
+#[non_exhaustive]
+pub enum T1 {}
diff --git a/tests/rustdoc/reexport/reexport-attrs.rs b/tests/rustdoc/reexport/reexport-attrs.rs
new file mode 100644
index 0000000000000..0ec645841f0b8
--- /dev/null
+++ b/tests/rustdoc/reexport/reexport-attrs.rs
@@ -0,0 +1,20 @@
+//@ aux-build: reexports-attrs.rs
+
+#![crate_name = "foo"]
+
+extern crate reexports_attrs;
+
+//@ has 'foo/fn.f0.html' '//pre[@class="rust item-decl"]' '#[no_mangle]'
+pub use reexports_attrs::f0;
+
+//@ has 'foo/fn.f1.html' '//pre[@class="rust item-decl"]' '#[link_section = ".here"]'
+pub use reexports_attrs::f1;
+
+//@ has 'foo/fn.f2.html' '//pre[@class="rust item-decl"]' '#[export_name = "f2export"]'
+pub use reexports_attrs::f2;
+
+//@ has 'foo/enum.T0.html' '//pre[@class="rust item-decl"]' '#[repr(u8)]'
+pub use reexports_attrs::T0;
+
+//@ has 'foo/enum.T1.html' '//pre[@class="rust item-decl"]' '#[non_exhaustive]'
+pub use reexports_attrs::T1;