diff -r 2143feab681a -r cece972575ac src/jdk.compiler/share/classes/com/sun/tools/javac/comp/DeferredAttr.java
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/DeferredAttr.java	Wed May 02 13:44:49 2018 +0200
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/DeferredAttr.java	Wed May 02 15:29:55 2018 +0100
@@ -441,7 +441,7 @@
         } else {
             stats.add((JCBlock)that.body);
         }
-        JCBlock lambdaBlock = make.Block(0, stats.toList());
+        JCBlock lambdaBlock = make.at(that.pos).Block(0, stats.toList());
         Env<AttrContext> localEnv = attr.lambdaEnv(that, env);
         try {
             localEnv.info.returnResult = resultInfo;