invocation type inference: don't create fresh variables for all type parameters but only for those where wildcards are used in return type (IDEA-155627; IDEA-151220; IDEA-151387)

java/java-tests/testSrc/com/intellij/codeInsight/daemon/lambda/GraphInferenceHighlightingTest.java

@@ -468,6 +468,10 @@ public class GraphInferenceHighlightingTest extends LightDaemonAnalyzerTestCase
     }
   }
 
+  public void testCreateFreshVariablesOnlyForWildcardPlacesDuringReturnTypeProcessing() throws Exception {
+    doTest();
+  }
+
   private void doTest() throws Exception {
     doTest(false);
   }