From a1662079191f33416746ec2e44756a0b73c6bdc0 Mon Sep 17 00:00:00 2001
From: Will Rouesnel <w.rouesnel@gmail.com>
Date: Thu, 31 Aug 2017 12:02:56 +1000
Subject: [PATCH] http.go: incorrect error message displayed when no metrics
 encoded error

The "No metrics encoded" error was erroneously displayed the value of err, not
lastErr.
---
 prometheus/http.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/prometheus/http.go b/prometheus/http.go
index d485ce0..bfee5c6 100644
--- a/prometheus/http.go
+++ b/prometheus/http.go
@@ -96,7 +96,7 @@ func UninstrumentedHandler() http.Handler {
 			closer.Close()
 		}
 		if lastErr != nil && buf.Len() == 0 {
-			http.Error(w, "No metrics encoded, last error:\n\n"+err.Error(), http.StatusInternalServerError)
+			http.Error(w, "No metrics encoded, last error:\n\n"+lastErr.Error(), http.StatusInternalServerError)
 			return
 		}
 		header := w.Header()