# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@logilab.fr>
# Date 1342534577 -7200
# 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 -r 5cd3e526ac37 -r ec80ae982689 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Tue Jul 17 18:21:49 2012 +0200
+++ b/mercurial/localrepo.py	Tue Jul 17 16:16:17 2012 +0200
@@ -745,7 +745,7 @@
         # 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: