* python/tag.cc:

  - Hack the TagFile iterator to not use shared storage (Closes: #572596):
    Scan once, duplicate the section data, and scan again.

2 files changed, 19 insertions, 0 deletions

diff --git a/debian/changelog b/debian/changelog
index 7986b91c..77e1dde1 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,6 +4,9 @@ python-apt (0.7.93.4) unstable; urgency=low
     - Add AcquireItem.partialsize member.
   * python/generic.cc:
     - Map UntranslatedDepType to dep_type_untranslated.
+  * python/tag.cc:
+    - Hack the TagFile iterator to not use shared storage (Closes: #572596):
+      Scan once, duplicate the section data, and scan again.
   * apt/package.py:
     - Create a string class BaseDependency.__dstr which makes '>' equal to
       '>>' and '<' equal to '<<' (compatibility).
diff --git a/python/tag.cc b/python/tag.cc
index 6d327d27..c7edcb31 100644
--- a/python/tag.cc
+++ b/python/tag.cc
@@ -271,6 +271,22 @@ static PyObject *TagFileNext(PyObject *Self)
    Obj.Section->Data = 0;
    if (Obj.Object.Step(Obj.Section->Object) == false)
       return HandleErrors(NULL);
+
+   // Bug-Debian: http://bugs.debian.org/572596
+   // Duplicate the data here and scan the duplicated section data; in order
+   // to not use any shared storage.
+   // TODO: Provide an API in apt-pkg to do this; this is really ugly.
+
+   // Fetch old section data
+   const char *Start;
+   const char *Stop;
+   Obj.Section->Object.GetSection(Start,Stop);
+   // Duplicate the data
+   Obj.Section->Data = new char[Stop-Start];
+   strncpy(Obj.Section->Data, Start, Stop-Start);
+   // Rescan it
+   Obj.Section->Object.Scan(Obj.Section->Data, Stop-Start);
+
    Py_INCREF(Obj.Section);
    return HandleErrors(Obj.Section);
 }