rustdoc: correctly propagate cfgs for glob reexports

src/librustdoc/clean/mod.rs

@@ -243,8 +243,8 @@ fn generate_item_with_correct_attrs(
             ) || (is_glob_import(tcx, import_id)
                 && (cx.document_hidden() || !tcx.is_doc_hidden(def_id)))
                 || macro_reexport_is_inline(tcx, import_id, def_id);
-            attrs.extend(get_all_import_attributes(cx, import_id, def_id, is_inline));
             is_inline = is_inline || import_is_inline;
+            attrs.extend(get_all_import_attributes(cx, import_id, def_id, is_inline));
         }
         let keep_target_cfg = is_inline || matches!(kind, ItemKind::TypeAliasItem(..));
         add_without_unwanted_attributes(&mut attrs, target_attrs, keep_target_cfg, None);

tests/rustdoc-html/reexport/glob-reexport-feature-combination.rs

@@ -0,0 +1,57 @@
+//@ compile-flags: --cfg feature="foo" --cfg  feature="bar" --cfg feature="baz"
+
+#![crate_name = "foo"]
+#![feature(doc_cfg)]
+
+//==================================================================================================
+//@ has 'foo/struct.A.html'
+//@ has - '//*[@id="main-content"]/*[@class="item-info"]/*[@class="stab portability"]' \
+//    'Available on crate features foo and bar only.'
+
+mod a {
+    mod inner {
+        pub struct A {}
+    }
+    #[cfg(feature = "bar")]
+    pub use self::inner::A;
+}
+#[cfg(feature = "foo")]
+pub use a::*;
+
+//==================================================================================================
+//@ has 'foo/struct.B.html'
+//@ has - '//*[@id="main-content"]/*[@class="item-info"]/*[@class="stab portability"]' \
+//    'Available on crate features foo and bar and baz only.'
+
+mod b {
+    mod inner {
+        mod innermost {
+            pub struct B {}
+        }
+        #[cfg(feature = "baz")]
+        pub use self::innermost::B;
+    }
+    #[cfg(feature = "bar")]
+    pub use self::inner::*;
+}
+#[cfg(feature = "foo")]
+pub use b::*;
+
+//==================================================================================================
+//@ has 'foo/struct.C.html'
+//@ has - '//*[@id="main-content"]/*[@class="item-info"]/*[@class="stab portability"]' \
+//    'Available on crate features foo and bar and baz only.'
+
+mod c {
+    mod inner {
+        mod innermost {
+            #[cfg(feature = "baz")]
+            pub struct C {}
+        }
+        pub use self::innermost::*;
+    }
+    #[cfg(feature = "bar")]
+    pub use self::inner::*;
+}
+#[cfg(feature = "foo")]
+pub use c::*;