method signature: don't substitute twice during erasure (IDEA-167386)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting/AvoidDblSubstitutionDuringErasureOfParameterTypesOfMethodSignature.java

@@ -0,0 +1,10 @@
+class Foo<T> {
+  void run(T param) {}
+
+  void anonymousClass() {
+    new Foo<T[]>() {
+      @Override
+      void run(T[] param) {}
+    };
+  }
+}