From 754744630ff6228029cd025074dc0cfe3de08495 Mon Sep 17 00:00:00 2001
From: Emanuele Rocca <ema@debian.org>
Date: Mon, 6 Oct 2008 10:31:30 +0200
Subject: Test case and proposed fix for Debian bug #497049

---
 python/cache.cc | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

(limited to 'python')

diff --git a/python/cache.cc b/python/cache.cc
index bd280dec..523444b5 100644
--- a/python/cache.cc
+++ b/python/cache.cc
@@ -936,14 +936,25 @@ PyObject *TmpGetCache(PyObject *Self,PyObject *Args)
    pkgCacheFile *Cache = new pkgCacheFile();
 
    if(pyCallbackInst != 0) {
+      if (PyObject_HasAttrString(pyCallbackInst, "done") != 1) {
+        PyErr_SetString(PyExc_ValueError,
+                        "progress object must implement done()");
+        return 0;
+      }
+      if (PyObject_HasAttrString(pyCallbackInst, "update") != 1) {
+        PyErr_SetString(PyExc_ValueError,
+                        "progress object must implement update()");
+        return 0;
+      }
       PyOpProgress progress;
       progress.setCallbackInst(pyCallbackInst);
       if (Cache->Open(progress,false) == false)
-	 return HandleErrors();
-   }  else {
+         return HandleErrors();
+   }  
+   else {
       OpTextProgress Prog;
       if (Cache->Open(Prog,false) == false)
-	 return HandleErrors();
+	     return HandleErrors();
    }
 
    CppOwnedPyObject<pkgCacheFile*> *CacheFileObj =
-- 
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