rustdoc: add regression test for issue 135092

Author: lolbinarycat

src/librustdoc/clean/mod.rs

@@ -89,7 +89,7 @@ pub(crate) fn clean_doc_module<'tcx>(doc: &DocModule<'tcx>, cx: &mut DocContext<
         Some(item)
     }));
 
-    // Split up imports from all other items.
+    // Split up glob imports from all other items.
     //
     // This covers the case where somebody does an import which should pull in an item,
     // but there's already an item with the same namespace and same name. Rust gives
@@ -2761,7 +2761,6 @@ fn clean_maybe_renamed_item<'tcx>(
     import_id: Option<LocalDefId>,
 ) -> Vec<Item> {
     use hir::ItemKind;
-
     fn get_name(
         cx: &DocContext<'_>,
         item: &hir::Item<'_>,
@@ -2973,6 +2972,7 @@ fn clean_extern_crate<'tcx>(
         && !cx.is_json_output();
 
     let krate_owner_def_id = krate.owner_id.def_id;
+
     if please_inline
         && let Some(items) = inline::try_inline(
             cx,

tests/rustdoc/reexport/extern-135092.rs

@@ -0,0 +1,26 @@
+// Test to make sure reexports of extern items are combined
+// <https://github.com/rust-lang/rust/issues/135092>
+
+#![crate_name = "foo"]
+
+mod native {
+    extern "C" {
+        /// bar.
+        pub fn bar();
+    }
+
+    /// baz.
+    pub fn baz() {}
+}
+
+//@ has 'foo/fn.bar.html'
+//@ has - '//div[@class="docblock"]' 'bar.'
+//@ has - '//div[@class="docblock"]' 'foo'
+/// foo
+pub use native::bar;
+
+//@ has 'foo/fn.baz.html'
+//@ has - '//div[@class="docblock"]' 'baz.'
+//@ has - '//div[@class="docblock"]' 'foo'
+/// foo
+pub use native::baz;