diff -r 865d39b662a5 -r 41ae5c69b09c src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/ResponseContent.java
--- a/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/ResponseContent.java	Fri Dec 15 14:08:15 2017 +0100
+++ b/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/ResponseContent.java	Tue Dec 19 15:48:49 2017 +0000
@@ -401,8 +401,8 @@
             pusher.onSubscribe(this.sub = sub);
             try {
                 if (contentLength == 0) {
+                    onFinished.run();
                     pusher.onComplete();
-                    onFinished.run();
                     onComplete.accept(null);
                 }
             } catch (Throwable t) {