From 2a3f3893b2197fa0604e09fb662f1112a453e7f4 Mon Sep 17 00:00:00 2001
From: Arch Librarian <arch@canonical.com>
Date: Mon, 20 Sep 2004 16:58:48 +0000
Subject: [PATCH] Fixed a possible segfault Author: jgg Date: 2001-12-26
 06:47:37 GMT Fixed a possible segfault

---
 apt-pkg/algorithms.cc | 8 +++++---
 cmdline/apt-cache.cc  | 4 ++--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc
index 322c667f2..2dd9aaaf1 100644
--- a/apt-pkg/algorithms.cc
+++ b/apt-pkg/algorithms.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: algorithms.cc,v 1.36 2001/05/27 03:46:10 jgg Exp $
+// $Id: algorithms.cc,v 1.37 2001/12/26 06:47:37 jgg Exp $
 /* ######################################################################
 
    Algorithms - A set of misc algorithms
@@ -225,7 +225,8 @@ bool pkgApplyStatus(pkgDepCache &Cache)
 	 else
 	 {
 	    // Is this right? Will dpkg choke on an upgrade?
-	    if (Cache[I].CandidateVerIter(Cache).Downloadable() == true)
+	    if (Cache[I].CandidateVer != 0 &&
+		 Cache[I].CandidateVerIter(Cache).Downloadable() == true)
 	       Cache.MarkInstall(I);
 	    else
 	       return _error->Error(_("The package %s needs to be reinstalled, "
@@ -246,7 +247,8 @@ bool pkgApplyStatus(pkgDepCache &Cache)
 	    Cache.MarkKeep(I);
 	 else
 	 {
-	    if (Cache[I].CandidateVerIter(Cache).Downloadable() == true)
+	    if (Cache[I].CandidateVer != 0 &&
+		 Cache[I].CandidateVerIter(Cache).Downloadable() == true)
 	       Cache.MarkInstall(I);
 	    else
 	       Cache.MarkDelete(I);
diff --git a/cmdline/apt-cache.cc b/cmdline/apt-cache.cc
index 691899b3e..426bfc5b9 100644
--- a/cmdline/apt-cache.cc
+++ b/cmdline/apt-cache.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: apt-cache.cc,v 1.53 2001/12/07 05:57:43 jgg Exp $
+// $Id: apt-cache.cc,v 1.54 2001/12/26 06:47:58 jgg Exp $
 /* ######################################################################
    
    apt-cache - Manages the cache files
@@ -1362,7 +1362,7 @@ int main(int argc,const char *argv[])
 
    if (CmdL.DispatchArg(CmdsA,false) == false && _error->PendingError() == false)
    { 
-      MMap *Map;
+      MMap *Map = 0;
       if (_config->FindB("APT::Cache::Generate",true) == false)
       {
 	 Map = new MMap(*new FileFd(_config->FindFile("Dir::Cache::pkgcache"),
-- 
2.47.2