* apt-pkg/contrib/mmap.cc:

  - do not try to free the mapping if its is unset

apt-pkg/contrib/mmap.cc

@@ -266,6 +266,8 @@ DynamicMMap::~DynamicMMap()
 {
    if (Fd == 0)
    {
+      if (Base == 0)
+	 return;
 #ifdef _POSIX_MAPPED_FILES
       munmap(Base, WorkSpace);
 #else

debian/changelog

@@ -9,8 +9,10 @@ apt (0.8.12) unstable; urgency=low
       marker could be lost later by the removal of rdepends (Closes: #612557)
   * methods/rred.cc:
     - read patch into MMap only if we work on uncompressed patches
+  * apt-pkg/contrib/mmap.cc:
+    - do not try to free the mapping if its is unset
 
- -- David Kalnischkies <kalnischkies@gmail.com>  Sat, 12 Feb 2011 13:43:11 +0100
+ -- David Kalnischkies <kalnischkies@gmail.com>  Sat, 12 Feb 2011 19:39:25 +0100
 
 apt (0.8.11.1) unstable; urgency=low