* apt/utils.py:

  - fix end date calculation for releases in june

1 files changed, 5 insertions, 0 deletions

diff --git a/apt/utils.py b/apt/utils.py
index 80ba6d65..8fc69215 100644
--- a/apt/utils.py
+++ b/apt/utils.py
@@ -28,11 +28,16 @@ def get_maintenance_end_date(release_date, m_months):
     ends. Needs the data of the release and the number of months that
     its is supported as input
     """
+    # calc end date
     years = m_months / 12
     months = m_months % 12
     support_end_year = (release_date.year + years +
                         (release_date.month + months)/12)
     support_end_month = (release_date.month + months) % 12
+    # special case: this happens when e.g. doing 2010-06 + 18 months
+    if support_end_month == 0:
+        support_end_month = 12
+        support_end_year -= 1
     return (support_end_year, support_end_month)