branchmap: revert c34532365b38 for Python 2.7 compatibility
Old versions of python 2.7 don't like that the second argument to
struct.unpack_from is a bytearray, so the change removing the util.buffer
around that argument in branchmap broke running on older versions of python
2.7.
Differential Revision: https://phab.mercurial-scm.org/D330
--- a/mercurial/branchmap.py Thu Aug 10 18:46:55 2017 -0400
+++ b/mercurial/branchmap.py Thu Aug 10 20:47:19 2017 -0700
@@ -406,7 +406,8 @@
# fast path: extract data from cache, use it if node is matching
reponode = changelog.node(rev)[:_rbcnodelen]
- cachenode, branchidx = unpack_from(_rbcrecfmt, self._rbcrevs, rbcrevidx)
+ cachenode, branchidx = unpack_from(
+ _rbcrecfmt, util.buffer(self._rbcrevs), rbcrevidx)
close = bool(branchidx & _rbccloseflag)
if close:
branchidx &= _rbcbranchidxmask