* python/cache.cc:

  - Check that 2nd argument to Cache.update() really is a SourceList object.

2 files changed, 4 insertions, 1 deletions

diff --git a/debian/changelog b/debian/changelog
index 5d287831..b66f108e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,6 +4,8 @@ python-apt (0.7.94.3) UNRELEASED; urgency=low
   * apt/package.py:
     - Decode using utf-8 in installed_files (LP: #407953).
     - Fix fetch_source() to work when source name = binary name (LP: #552400).
+  * python/cache.cc:
+    - Check that 2nd argument to Cache.update() really is a SourceList object.
   * python/generic.cc:
     - Fix a memory leak when using old attribute names.
     - Map ArchiveURI property to archive_uri
diff --git a/python/cache.cc b/python/cache.cc
index 3c9bc785..e2f26dbb 100644
--- a/python/cache.cc
+++ b/python/cache.cc
@@ -90,7 +90,8 @@ static PyObject *PkgCacheUpdate(PyObject *Self,PyObject *Args)
    PyObject *pyFetchProgressInst = 0;
    PyObject *pySourcesList = 0;
    int pulseInterval = 0;
-   if (PyArg_ParseTuple(Args, "OO|i", &pyFetchProgressInst,&pySourcesList, &pulseInterval) == 0)
+   if (PyArg_ParseTuple(Args, "OO!|i", &pyFetchProgressInst,
+            &PySourceList_Type, &pySourcesList, &pulseInterval) == 0)
       return 0;
 
    PyFetchProgress progress;