fix potentially broken redirect from rustdoc

Author: syphar

src/web/rustdoc.rs

@@ -542,12 +542,16 @@ pub(crate) async fn rustdoc_html_server_handler(
             } else if req_path.first().map_or(false, |p| p.contains('-')) {
                 // This is a target, not a module; it may not have been built.
                 // Redirect to the default target and show a search page instead of a hard 404.
-                redirect(
-                    &format!("/crate/{}", params.name),
-                    &format!("{}/target-redirect", version),
-                    &req_path,
+                Ok(axum_cached_redirect(
+                    format!(
+                        "/crate/{}/{}/target-redirect/{}",
+                        params.name,
+                        version,
+                        req_path.join("/")
+                    ),
                     CachePolicy::ForeverInCdn,
-                )
+                )?
+                .into_response())
             } else {
                 Err(AxumNope::ResourceNotFound)
             };