From 48a9c0cd15fe3eb89466760fa6a8c5b4b77c4471 Mon Sep 17 00:00:00 2001
From: "mozilla.mano%sent.com" <mozilla.mano%sent.com>
Date: Sat, 15 Apr 2006 14:02:12 +0000
Subject: [PATCH] Bug 269813 - return failure when trying to open a zipreader
 twice. patch by Nickolay Ponomarev <asqueella@gmail.com>, r=darin, sr=bz.

---
 modules/libjar/nsJAR.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modules/libjar/nsJAR.cpp b/modules/libjar/nsJAR.cpp
index 353a82c5b6ac..722f5a39fade 100644
--- a/modules/libjar/nsJAR.cpp
+++ b/modules/libjar/nsJAR.cpp
@@ -213,6 +213,8 @@ nsJAR::GetFile(nsIFile* *result)
 NS_IMETHODIMP
 nsJAR::Open()
 {
+  NS_ENSURE_TRUE(!mFd, NS_ERROR_ALREADY_INITIALIZED);
+
   nsresult rv;
   nsCOMPtr<nsILocalFile> localFile = do_QueryInterface(mZipFile, &rv);
   if (NS_FAILED(rv)) return rv;