From afa07d49723245c8e48e1d63c62bea4b78810455 Mon Sep 17 00:00:00 2001
From: "fur%geocast.com" <fur%geocast.com>
Date: Sat, 18 Dec 1999 14:59:59 +0000
Subject: [PATCH] Added assertion and trivial recovery code to catch the case
 of a load group listener factory that reports success, but nevertheless
 returns a NULL stream listener.

---
 netwerk/cache/mgr/nsCacheEntryChannel.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/netwerk/cache/mgr/nsCacheEntryChannel.cpp b/netwerk/cache/mgr/nsCacheEntryChannel.cpp
index 4a6518d3ae8..9e64e0017a9 100644
--- a/netwerk/cache/mgr/nsCacheEntryChannel.cpp
+++ b/netwerk/cache/mgr/nsCacheEntryChannel.cpp
@@ -169,6 +169,8 @@ nsCacheEntryChannel::AsyncRead(PRUint32 aStartPosition, PRInt32 aReadCount,
 {
     nsresult rv;
 
+	NS_ENSURE_ARG(aListener);
+
     mCacheEntry->NoteAccess();
 
     nsCOMPtr<nsIStreamListener> headListener;
@@ -183,6 +185,9 @@ nsCacheEntryChannel::AsyncRead(PRUint32 aStartPosition, PRInt32 aReadCount,
                                                   getter_AddRefs(headListener));
             if (NS_FAILED(rv)) return rv;
         }
+        NS_ASSERTION(headListener, "Load group listener factory did not create listener");
+        if (!headListener)
+            headListener = aListener;
 
     } else {
         headListener = aListener;