From e87046a87e6fa0385d2ff32b11e7ed938664d814 Mon Sep 17 00:00:00 2001
From: beorn7 <beorn@soundcloud.com>
Date: Fri, 2 Feb 2018 15:53:28 +0100
Subject: [PATCH] Fix more interface upgrade bugs

---
 prometheus/promhttp/delegator.go     | 4 ++--
 prometheus/promhttp/delegator_1_8.go | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/prometheus/promhttp/delegator.go b/prometheus/promhttp/delegator.go
index 659c717..9c1c66d 100644
--- a/prometheus/promhttp/delegator.go
+++ b/prometheus/promhttp/delegator.go
@@ -102,10 +102,10 @@ func init() {
 		return d
 	}
 	pickDelegator[closeNotifier] = func(d *responseWriterDelegator) delegator { // 1
-		return closeNotifierDelegator{d}
+		return &closeNotifierDelegator{d}
 	}
 	pickDelegator[flusher] = func(d *responseWriterDelegator) delegator { // 2
-		return flusherDelegator{d}
+		return &flusherDelegator{d}
 	}
 	pickDelegator[flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 3
 		return struct {
diff --git a/prometheus/promhttp/delegator_1_8.go b/prometheus/promhttp/delegator_1_8.go
index f4d386f..75a905e 100644
--- a/prometheus/promhttp/delegator_1_8.go
+++ b/prometheus/promhttp/delegator_1_8.go
@@ -28,7 +28,7 @@ func (d *pusherDelegator) Push(target string, opts *http.PushOptions) error {
 
 func init() {
 	pickDelegator[pusher] = func(d *responseWriterDelegator) delegator { // 16
-		return pusherDelegator{d}
+		return &pusherDelegator{d}
 	}
 	pickDelegator[pusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 17
 		return struct {