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-rw-r--r--apt-pkg/algorithms.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc
index eb59a42ca..bd8147291 100644
--- a/apt-pkg/algorithms.cc
+++ b/apt-pkg/algorithms.cc
@@ -512,7 +512,7 @@ void pkgProblemResolver::MakeScores()
on the same level. We enhance the score of installed packages
if those are not obsolete
*/
- if (I->CurrentVer != 0 && Cache[I].CandidateVerIter(Cache).Downloadable())
+ if (I->CurrentVer != 0 && Cache[I].CandidateVer != 0 && Cache[I].CandidateVerIter(Cache).Downloadable())
Score += 1;
}