localrepo: make _refreshfilecachestats unfiltered method to refresh correctly
Before this patch, if transaction is started via "filtered repo"
object, _refreshfilecachestats() at closing transaction doesn't
refresh file stat of any @filecache properties correctly, because:
- _refreshfilecachestats() omits refreshing file stat of a
@filecache property, if it doesn't appear in self.__dict__
- if transaction is started via "filtered repo",
_refreshfilecachestats() is applied on "filtered repo"
because repo.transaction() adds "self._refreshfilecachestats" to
post close procedures. repo.transaction() isn't unfiltered method,
and "self" in it means "filtered repo" in this case.
Transactions started by explicit repo.transaction() easily causes
this situation.
- _refreshfilecachestats() applied on "filtered repo" omits whole
refreshing
because @filecache properties are stored into "unfiltered repo",
and appear only in self.__dict__ of "unfiltered repo".
This incorrect refreshing causes unnecessary reloading from files.
To refresh file stat of @filecache properties at closing transaction
correctly, this patch makes _refreshfilecachestats() unfiltered
method.
This patch chooses making _refreshfilecachestats() unfiltered method
instead of making transaction() unfiltered method, to reduce
unexpected side effect.
Test for CVE-2016-3630
$ hg init
>>> open("a.i", "w").write(
... """eJxjYGZgZIAAYQYGxhgom+k/FMx8YKx9ZUaKSOyqo4cnuKb8mbqHV5cBCVTMWb1Cwqkhe4Gsg9AD
... Joa3dYtcYYYBAQ8Qr4OqZAYRICPTSr5WKd/42rV36d+8/VmrNpv7NP1jQAXrQE4BqQUARngwVA=="""
... .decode("base64").decode("zlib"))
$ hg debugindex a.i
rev offset length delta linkrev nodeid p1 p2
0 0 19 -1 2 99e0332bd498 000000000000 000000000000
1 19 12 0 3 6674f57a23d8 99e0332bd498 000000000000
$ hg debugdata a.i 1 2>&1 | egrep 'Error:.*decoded'
(mercurial.mpatch.)?mpatchError: patch cannot be decoded (re)