method refs: missed super class substitution (IDEA-126969)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/newMethodRef/IDEA126969.java

@@ -0,0 +1,15 @@
+import java.util.Collection;
+import java.util.List;
+import java.util.stream.Stream;
+
+class IDEA126969 {
+  void foo(final Stream<List<Integer>> stream) {
+
+    stream.flatMap(List::stream)
+      .forEach(i -> System.out.println(i.floatValue()));
+
+    stream.flatMap(Collection::stream)
+      .forEach(i -> System.out.println(i.floatValue()));
+
+  }
+}

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

@@ -273,6 +273,10 @@ public class NewMethodRefHighlightingTest extends LightDaemonAnalyzerTestCase {
     doTest();
   }
 
+  public void testIDEA126969() throws Exception {
+    doTest();
+  }
+
   private void doTest() {
     doTest(false);
   }