From a0c6c89208845b8f4a0c3eecec2669af1e4852e8 Mon Sep 17 00:00:00 2001
From: Yaron Tausky <ytausky@mozilla.com>
Date: Thu, 9 Jan 2020 22:23:13 +0100
Subject: [PATCH] Make copy of list before iterating over it.

---
 dom/cache/StreamControl.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dom/cache/StreamControl.cpp b/dom/cache/StreamControl.cpp
index aab1766662..69a72d0b61 100644
--- a/dom/cache/StreamControl.cpp
+++ b/dom/cache/StreamControl.cpp
@@ -68,7 +68,8 @@ StreamControl::CloseAllReadStreams()
 {
   AssertOwningThread();
 
-  ReadStreamList::ForwardIterator iter(mReadStreamList);
+  auto readStreamList = mReadStreamList;
+  ReadStreamList::ForwardIterator iter(readStreamList);
   while (iter.HasMore()) {
     iter.GetNext()->CloseStream();
   }