lambda return type inconsistency: highlight all found errors (IDEA-158853)

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

@@ -0,0 +1,15 @@
+
+import java.util.function.Supplier;
+
+class Test {
+  public static void bar(boolean f) {
+    foo(() -> {
+      if (f) <error descr="Missing return value">return;</error>
+      if (false) <error descr="Missing return value">return;</error>
+      if (!f) return <error descr="Bad return type in lambda expression: int cannot be converted to String">1</error>;
+      return null;
+    });
+  }
+
+  public static void foo(Supplier<String> consumer) {}
+}