CLJS-2303: Disable duplicate alias checking for self-host

Author: anmonteiro

src/main/clojure/cljs/analyzer.cljc

@@ -2746,8 +2746,9 @@
               (let [merge-keys
                     [:use-macros :require-macros :rename-macros
                      :uses :requires :renames :imports]]
-                (when *check-alias-dupes*
-                  (check-duplicate-aliases env ns-info' require-info))
+                #?(:clj
+                   (when *check-alias-dupes*
+                     (check-duplicate-aliases env ns-info' require-info)))
                 (merge
                   ns-info'
                   {:excludes excludes}

src/test/self/self_host/test.cljs

@@ -1191,6 +1191,27 @@
           (is (nil? error))
           (inc! l))))))
 
+(deftest test-cljs-2303
+  (async done
+    (let [st (cljs/empty-state)
+          load (fn [{:keys [name macros]} cb]
+                 (cb (when (and (= name 'cljs.x)
+                             (not macros))
+                       {:lang   :clj
+                        :source "(ns cljs.x)"})))
+          l  (latch 1 done)]
+      (cljs.js/eval-str st "(require 'clojure.x)" nil
+        {:eval node-eval
+         :load load}
+        (fn [{:keys [error]}]
+          (is (nil? error))
+          (cljs.js/eval-str st "(require 'clojure.x)" nil
+            {:eval node-eval
+             :load load}
+            (fn [{:keys [error]}]
+              (is (nil? error))
+              (inc! l))))))))
+
 (defn -main [& args]
   (run-tests))