IDEA-178535 Duplicate class suggestions in cast

java/java-tests/testData/codeInsight/completion/normal/NoDuplicateInCast.java

@@ -0,0 +1,11 @@
+class X {
+  void foo(Object o){
+    if (o instanceof Foo) {
+      ((Foo<caret>) o).bar();
+    }
+  }
+
+  class Foo {
+    void bar() {}
+  }
+}