Fix error reporting bug

That's the same bug fixed in #342 (which is the deprecated code only replicated in the `prometheus` package until v0.10 is out).
2017-08-31 15:10:58 +02:00 · 2017-08-31 15:10:58 +02:00 · 2cb8df16e3
parent 535f493f5a
commit 2cb8df16e3
1 changed files with 1 additions and 1 deletions
--- a/prometheus/promhttp/http.go
+++ b/prometheus/promhttp/http.go
@ -128,7 +128,7 @@ func HandlerFor(reg prometheus.Gatherer, opts HandlerOpts) 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()