[PATCH 6 of 7] contrib/perf: perfparents handle filtered repos

[timeless]

# HG changeset patch
# User timeless <timeless at mozdev.org>
# Date 1448400980 0
#      Tue Nov 24 21:36:20 2015 +0000
# Node ID dd024f4eafead08b0d150eb2b9210d6d3087fd65
# Parent  3cf447f1d3a7d77969331a93c8cd003b1dbcbaf7
contrib/perf: perfparents handle filtered repos

diff --git a/contrib/perf.py b/contrib/perf.py
--- a/contrib/perf.py
+++ b/contrib/perf.py
@@ -302,7 +302,10 @@
     timer, fm = gettimer(ui, opts)
     if len(repo.changelog) < 1000:
         raise error.Abort("repo needs 1000 commits for this test")
-    nl = [repo.changelog.node(i) for i in xrange(1000)]
+    try:
+        nl = [repo.changelog.node(i) for i in xrange(1000)]
+    except error.FilteredIndexError:
+        raise error.Abort("the first 1000 commits cannot be filtered")
     def d():
         for n in nl:
             repo.changelog.parents(n)