From db6f2f37185ec61b3c8a73cbfec7216399b400fa Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Fri, 14 Apr 2017 21:06:33 +0200
Subject: [PATCH] Ensure that `PDFThumbnailView.draw` is able to handle
 `RenderingCancelledException` correctly (PR 8157 follow-up)

In PR 8157, I embarrassingly enough forgot to change `pdf_thumbnail_view.js` to match the changes made to `pdf_page_view.js`.
---
 web/pdf_thumbnail_view.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/web/pdf_thumbnail_view.js b/web/pdf_thumbnail_view.js
index a67e6abff..ebbf039f7 100644
--- a/web/pdf_thumbnail_view.js
+++ b/web/pdf_thumbnail_view.js
@@ -14,6 +14,7 @@
  */
 
 import { getOutputScale, mozL10n } from './ui_utils';
+import { RenderingCancelledException } from './pdfjs';
 import { RenderingStates } from './pdf_rendering_queue';
 
 var THUMBNAIL_WIDTH = 98; // px
@@ -288,8 +289,11 @@ var PDFThumbnailView = (function PDFThumbnailViewClosure() {
         if (renderTask === self.renderTask) {
           self.renderTask = null;
         }
-        if (error === 'cancelled') {
-          rejectRenderPromise(error);
+
+        if (((typeof PDFJSDev === 'undefined' ||
+              !PDFJSDev.test('PDFJS_NEXT')) && error === 'cancelled') ||
+            error instanceof RenderingCancelledException) {
+          resolveRenderPromise(undefined);
           return;
         }