From 6709388785bae39840313faa53c48b0ae2dae79c Mon Sep 17 00:00:00 2001
From: Yaron Tausky <ytausky@mozilla.com>
Date: Thu, 13 Jan 2022 19:28:51 +0000
Subject: Bug 1650214 - Cancel progress timer when shutting down FileReader

Not canceling the timer when run in a worker could lead to the timer firing
after the primary worker runnable finished running, leading to an assertion
failure in cycle collector code.
---
 dom/base/FileReader.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/dom/base/FileReader.cpp b/dom/base/FileReader.cpp
index 273e192d0c..7a8cb31d6e 100644
--- a/dom/base/FileReader.cpp
+++ b/dom/base/FileReader.cpp
@@ -775,6 +775,7 @@ FileReader::Shutdown()
     mAsyncStream = nullptr;
   }
 
+  ClearProgressEventTimer();
   FreeFileData();
   mResultArrayBuffer = nullptr;
 
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