From 98aa66e3aaf593128dda9ad7a66bde619d9bcb62 Mon Sep 17 00:00:00 2001
From: Cameron Kaiser <classilla@floodgap.com>
Date: Fri, 3 Apr 2020 18:54:16 -0700
Subject: [PATCH] #596: chemspill M1626728 1620818

---
 docshell/base/nsDocShell.cpp |  6 ++++++
 dom/cache/StreamList.cpp     | 10 +++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/docshell/base/nsDocShell.cpp b/docshell/base/nsDocShell.cpp
index 58a091739..aca78eeb7 100644
--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@@ -856,6 +856,12 @@ nsDocShell::~nsDocShell()
     shPrivate->SetRootDocShell(nullptr);
   }
 
+  if (mContentViewer) {
+    mContentViewer->Close(nullptr);
+    mContentViewer->Destroy();
+    mContentViewer = nullptr;
+  }
+
   if (--gDocShellCount == 0) {
     NS_IF_RELEASE(sURIFixup);
   }
diff --git a/dom/cache/StreamList.cpp b/dom/cache/StreamList.cpp
index 3e3ac2a67..6ca3a62b9 100644
--- a/dom/cache/StreamList.cpp
+++ b/dom/cache/StreamList.cpp
@@ -138,7 +138,15 @@ StreamList::CloseAll()
 {
   NS_ASSERT_OWNINGTHREAD(StreamList);
   if (mStreamControl) {
-    mStreamControl->CloseAll();
+    auto streamControl = mStreamControl;
+    mStreamControl = nullptr;
+
+    streamControl->CloseAll();
+
+    mStreamControl = streamControl;
+    streamControl = nullptr;
+
+    mStreamControl->Shutdown();
   }
 }