From a3742a9f8345c6c76b4b4a708a9bcd884ad0f6b6 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Thu, 30 May 2019 18:38:10 +0200
Subject: [PATCH] Ensure that the `Cmd`/`Name`/`Ref` caches are cleared when
 terminating the worker (PR 10863 follow-up)

Usually when the worker is terminated it will also be completely destroyed/removed, which means that any global caches (such as the ones in `src/core/primitive.js`) should be automatically cleared in the process.

However, for certain ways of loading the `pdf.worker.js` file, e.g. passing in a re-usable worker to `getDocument`, using the `workerPort` functionality, or even disabling workers completely  (even though this is never a good idea), the worker file may be kept in memory and these caches will not be cleared as expected.
---
 src/core/worker.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/worker.js b/src/core/worker.js
index 71dc63219..ad90d8ab5 100644
--- a/src/core/worker.js
+++ b/src/core/worker.js
@@ -19,10 +19,10 @@ import {
   PasswordException, setVerbosityLevel, UnexpectedResponseException,
   UnknownErrorException, UNSUPPORTED_FEATURES, VerbosityLevel, warn
 } from '../shared/util';
+import { clearPrimitiveCaches, Ref } from './primitives';
 import { LocalPdfManager, NetworkPdfManager } from './pdf_manager';
 import isNodeJS from '../shared/is_node';
 import { MessageHandler } from '../shared/message_handler';
-import { Ref } from './primitives';
 import { XRefParseException } from './core_utils';
 
 var WorkerTask = (function WorkerTaskClosure() {
@@ -700,6 +700,7 @@ var WorkerMessageHandler = {
       if (cancelXHRs) {
         cancelXHRs();
       }
+      clearPrimitiveCaches();
 
       var waitOn = [];
       WorkerTasks.forEach(function (task) {