# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@logilab.fr>
# Date 2012-07-17 14:16:17
# Node ID ec80ae982689194745795e466970cd52c1470409
# Parent  5cd3e526ac37c0259cf5bf94b81402cdc2c6e792

_updatebranchcache: prevent deleting dict key during iteration

We use dict.keys() to fetch all keys before starting to delete some. Otherwise
python complains that the dictionnary is altered during iteration.

diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -745,7 +745,7 @@ class localrepository(object):
         # branch that ceased to exist may not be in newbranches because
         # newbranches is the set of candidate heads, which when you strip the
         # last commit in a branch will be the parent branch.
-        for branch in partial:
+        for branch in partial.keys():
             nodes = [head for head in partial[branch]
                      if self.changelog.hasnode(head)]
             if not nodes: