Correctly handle super and ::

Author: GuillaumeGomez

src/librustdoc/clean/mod.rs

@@ -1497,9 +1497,18 @@ fn first_non_private(
             (cx.tcx.local_parent(hir_id.owner.def_id), leaf.ident)
         }
         // Crate paths are not. We start from the crate root.
-        [parent, leaf] if parent.ident.name == kw::Crate => {
+        [parent, leaf] if matches!(parent.ident.name, kw::Crate | kw::PathRoot) => {
             (LOCAL_CRATE.as_def_id().as_local()?, leaf.ident)
         }
+        [parent, leaf] if parent.ident.name == kw::Super => {
+            let parent_mod = cx.tcx.parent_module(hir_id);
+            if let Some(super_parent) = cx.tcx.opt_local_parent(parent_mod) {
+                (super_parent, leaf.ident)
+            } else {
+                // If we can't find the parent of the parent, then the parent is already the crate.
+                (LOCAL_CRATE.as_def_id().as_local()?, leaf.ident)
+            }
+        }
         // Absolute paths are not. We start from the parent of the item.
         [.., parent, leaf] => (parent.res.opt_def_id()?.as_local()?, leaf.ident),
     };

tests/rustdoc/issue-81141-private-reexport-in-public-api-2.rs

@@ -0,0 +1,13 @@
+// edition:2015
+
+#![crate_name = "foo"]
+
+use external::Public as Private;
+
+pub mod external {
+    pub struct Public;
+
+    // @has 'foo/external/fn.make.html'
+    // @has - '//*[@class="rust item-decl"]/code' 'pub fn make() -> Public'
+    pub fn make() -> ::Private { super::Private }
+}

tests/rustdoc/issue-81141-private-reexport-in-public-api.rs

@@ -112,3 +112,13 @@ pub fn bar14() -> nested::nested2::Whatever3 {
 pub fn bar15() -> nested::nested2::Whatever4 {
     Whatever
 }
+
+use external::Public as Private;
+
+pub mod external {
+    pub struct Public;
+
+    // @has 'foo/external/fn.make.html'
+    // @has - '//*[@class="rust item-decl"]/code' 'pub fn make() -> Public'
+    pub fn make() -> super::Private { super::Private }
+}