From b40722fbf7950ccf87a1878d5ec0b50993cededb Mon Sep 17 00:00:00 2001
From: Daniel Thee Roperto <danielroperto@catalyst-au.net>
Date: Mon, 30 Jan 2017 13:37:19 +1100
Subject: [PATCH] MDL-57809 weblib: Progress bar and output buffer - added
 debugging

This fix makes Moodle show a debbuging message if using progressbar without defining NO_OUTPUT_BUFFERING.
---
 lib/outputcomponents.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/outputcomponents.php b/lib/outputcomponents.php
index 3ec3b99642f..a1be437ba48 100644
--- a/lib/outputcomponents.php
+++ b/lib/outputcomponents.php
@@ -4747,6 +4747,10 @@ class progress_bar implements renderable, templatable {
      * @param bool $autostart Whether to start the progress bar right away.
      */
     public function __construct($htmlid = '', $width = 500, $autostart = false) {
+        if (!defined('NO_OUTPUT_BUFFERING') || !NO_OUTPUT_BUFFERING) {
+            debugging('progress_bar used without setting NO_OUTPUT_BUFFERING.', DEBUG_DEVELOPER);
+        }
+
         if (!empty($htmlid)) {
             $this->html_id  = $htmlid;
         } else {