good code red: do not apply the same substitutor twice - lead to problems when params depend recursively (IDEA-91866)

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

@@ -0,0 +1,20 @@
+abstract class F<A, B> {
+  public abstract B f(A a);
+
+  public final F<A, P1<B>> lazy() {
+    return new F<A, P1<B>>() {
+      public P1<B> f(final A a) {
+        return null;
+      }
+    };
+  }
+
+  private class TestClient<A, B> extends F<A, P1<B>> {
+    public P1<B> f(final A a) {
+      return null;
+    }
+  }
+}
+
+class P1<T> {
+}