# HG changeset patch
# User Boris Feld <boris.feld@octobus.net>
# Date 2017-10-18 13:38:51
# Node ID aa849cf5d089d9de7cb02b53b1c1667d4a0fbc81
# Parent  29f52e7966dd646ffa75ab65946ef2030017f72b

obsfate: fix obsfate_printer with empty date list

When the list of dates is empty, `min` and `max` would raises a ValueError.
Protect against this case by checking that the date list is not empty.

I didn't add a test because I couldn't find a reproducing test case.

diff --git a/mercurial/obsutil.py b/mercurial/obsutil.py
--- a/mercurial/obsutil.py
+++ b/mercurial/obsutil.py
@@ -822,7 +822,7 @@ def obsfateprinter(successors, markers, 
     # Date
     dates = markersdates(markers)
 
-    if verbose:
+    if dates and verbose:
         min_date = min(dates)
         max_date = max(dates)