Add: Regression test for PR#149919

tests/ui/rmeta/auxiliary/doc-inline-metadata-encoding-lib.rs

@@ -0,0 +1,27 @@
+#![crate_type = "lib"]
+#![crate_name = "doc_inline_metadata_encoding_lib"]
+
+mod inner {
+    pub struct PublicItem {
+        pub field: i32,
+    }
+
+    pub struct InnerItem {
+        pub field: i32,
+    }
+
+    pub struct MixedAttributes {
+        pub field: i32,
+    }
+}
+
+#[doc(inline)]
+pub use inner::PublicItem;
+
+#[doc(inline)]
+pub use inner::InnerItem;
+
+// Regression test for #149919.
+#[doc(hidden)]
+#[doc(inline)]
+pub use inner::MixedAttributes;

tests/ui/rmeta/doc-inline-metadata-encoding.rs

@@ -0,0 +1,15 @@
+// Regression test for #149919
+
+//@ compile-flags: --emit=metadata
+//@ aux-build:doc-inline-metadata-encoding-lib.rs
+//@ no-prefer-dynamic
+//@ build-pass
+
+extern crate doc_inline_metadata_encoding_lib;
+
+use doc_inline_metadata_encoding_lib::*;
+
+pub fn main() {
+    let _ = PublicItem { field: 42 };
+    let _ = InnerItem { field: 42 };
+}