inference: skip standalone expressions in lambda returns (IDEA-171922)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/newLambda/IgnoreStandaloneExpressionsInLambdaReturnForNestedCalls.java

@@ -0,0 +1,14 @@
+
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collector;
+import java.util.stream.Collectors;
+
+
+class Foo {
+  private static void foo(final Function<String, ?> compose) {
+    Collector<String, ?, ? extends Map<?, ArrayList<String>>> stringMapCollector =
+      Collectors.groupingBy(compose, Collector.of(() -> new ArrayList<String>(), null, null, s -> new ArrayList<>(s)));
+  }
+}