repoview: fix corrupted hiddencache crash Mercurial (issue5042)

Before this patch if the hiddencache existed but was empty, it would crash
mercurial. This patch adds exception handling when reading the hiddencache to
avoid the issue.
When encountering a corrupted cache file we print a devel warning. There would
be no point in issuing a normal warning as the user wouldn't be able to do
anything about the situation.

The warning looks like:

devel-warn: corrupted hidden cache, removing it at: /path/to/repoview.py

mercurial/repoview.py

@@ -1,346 +1,353
 # repoview.py - Filtered view of a localrepo object
 #
 # Copyright 2012 Pierre-Yves David <[e-mail]>
 #                Logilab SA        <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import copy
 import heapq
 import struct
 
 from .node import nullrev
 from . import (
     error,
     obsolete,
     phases,
     tags as tagsmod,
     util,
 )
 
 def hideablerevs(repo):
     """Revisions candidates to be hidden
 
     This is a standalone function to help extensions to wrap it."""
     return obsolete.getrevs(repo, 'obsolete')
 
 def _getstatichidden(repo):
     """Revision to be hidden (disregarding dynamic blocker)
 
     To keep a consistent graph, we cannot hide any revisions with
     non-hidden descendants. This function computes the set of
     revisions that could be hidden while keeping the graph consistent.
 
     A second pass will be done to apply "dynamic blocker" like bookmarks or
     working directory parents.
 
     """
     assert not repo.changelog.filteredrevs
     hidden = set(hideablerevs(repo))
     if hidden:
         getphase = repo._phasecache.phase
         getparentrevs = repo.changelog.parentrevs
         # Skip heads which are public (guaranteed to not be hidden)
         heap = [-r for r in repo.changelog.headrevs() if getphase(repo, r)]
         heapq.heapify(heap)
         heappop = heapq.heappop
         heappush = heapq.heappush
         seen = set() # no need to init it with heads, they have no children
         while heap:
             rev = -heappop(heap)
             # All children have been processed so at that point, if no children
             # removed 'rev' from the 'hidden' set, 'rev' is going to be hidden.
             blocker = rev not in hidden
             for parent in getparentrevs(rev):
                 if parent == nullrev:
                     continue
                 if blocker:
                     # If visible, ensure parent will be visible too
                     hidden.discard(parent)
                 # - Avoid adding the same revision twice
                 # - Skip nodes which are public (guaranteed to not be hidden)
                 pre = len(seen)
                 seen.add(parent)
                 if pre < len(seen) and getphase(repo, rev):
                     heappush(heap, -parent)
     return hidden
 
 def _getdynamicblockers(repo):
     """Non-cacheable revisions blocking hidden changesets from being filtered.
 
     Get revisions that will block hidden changesets and are likely to change,
     but unlikely to create hidden blockers. They won't be cached, so be careful
     with adding additional computation."""
 
     cl = repo.changelog
     blockers = set()
     blockers.update([par.rev() for par in repo[None].parents()])
     blockers.update([cl.rev(bm) for bm in repo._bookmarks.values()])
 
     tags = {}
     tagsmod.readlocaltags(repo.ui, repo, tags, {})
     if tags:
         rev, nodemap = cl.rev, cl.nodemap
         blockers.update(rev(t[0]) for t in tags.values() if t[0] in nodemap)
     return blockers
 
 cacheversion = 1
 cachefile = 'cache/hidden'
 
 def cachehash(repo, hideable):
     """return sha1 hash of repository data to identify a valid cache.
 
     We calculate a sha1 of repo heads and the content of the obsstore and write
     it to the cache. Upon reading we can easily validate by checking the hash
     against the stored one and discard the cache in case the hashes don't match.
     """
     h = util.sha1()
     h.update(''.join(repo.heads()))
     h.update(str(hash(frozenset(hideable))))
     return h.digest()
 
 def _writehiddencache(cachefile, cachehash, hidden):
     """write hidden data to a cache file"""
     data = struct.pack('>%ii' % len(hidden), *sorted(hidden))
     cachefile.write(struct.pack(">H", cacheversion))
     cachefile.write(cachehash)
     cachefile.write(data)
 
 def trywritehiddencache(repo, hideable, hidden):
     """write cache of hidden changesets to disk
 
     Will not write the cache if a wlock cannot be obtained lazily.
     The cache consists of a head of 22byte:
        2 byte    version number of the cache
       20 byte    sha1 to validate the cache
      n*4 byte    hidden revs
     """
     wlock = fh = None
     try:
         wlock = repo.wlock(wait=False)
         # write cache to file
         newhash = cachehash(repo, hideable)
         fh = repo.vfs.open(cachefile, 'w+b', atomictemp=True)
         _writehiddencache(fh, newhash, hidden)
     except (IOError, OSError):
         repo.ui.debug('error writing hidden changesets cache\n')
     except error.LockHeld:
         repo.ui.debug('cannot obtain lock to write hidden changesets cache\n')
     finally:
         if fh:
             fh.close()
         if wlock:
             wlock.release()
 
 def tryreadcache(repo, hideable):
     """read a cache if the cache exists and is valid, otherwise returns None."""
     hidden = fh = None
     try:
         if repo.vfs.exists(cachefile):
             fh = repo.vfs.open(cachefile, 'rb')
             version, = struct.unpack(">H", fh.read(2))
             oldhash = fh.read(20)
             newhash = cachehash(repo, hideable)
             if (cacheversion, oldhash) == (version, newhash):
                 # cache is valid, so we can start reading the hidden revs
                 data = fh.read()
                 count = len(data) / 4
                 hidden = frozenset(struct.unpack('>%ii' % count, data))
         return hidden
+    except struct.error:
+        repo.ui.debug('corrupted hidden cache\n')
+        # No need to fix the content as it will get rewritten
+        return None
+    except (IOError, OSError):
+        repo.ui.debug('cannot read hidden cache\n')
+        return None
     finally:
         if fh:
             fh.close()
 
 def computehidden(repo):
     """compute the set of hidden revision to filter
 
     During most operation hidden should be filtered."""
     assert not repo.changelog.filteredrevs
 
     hidden = frozenset()
     hideable = hideablerevs(repo)
     if hideable:
         cl = repo.changelog
         hidden = tryreadcache(repo, hideable)
         if hidden is None:
             hidden = frozenset(_getstatichidden(repo))
             trywritehiddencache(repo, hideable, hidden)
 
         # check if we have wd parents, bookmarks or tags pointing to hidden
         # changesets and remove those.
         dynamic = hidden & _getdynamicblockers(repo)
         if dynamic:
             blocked = cl.ancestors(dynamic, inclusive=True)
             hidden = frozenset(r for r in hidden if r not in blocked)
     return hidden
 
 def computeunserved(repo):
     """compute the set of revision that should be filtered when used a server
 
     Secret and hidden changeset should not pretend to be here."""
     assert not repo.changelog.filteredrevs
     # fast path in simple case to avoid impact of non optimised code
     hiddens = filterrevs(repo, 'visible')
     if phases.hassecret(repo):
         cl = repo.changelog
         secret = phases.secret
         getphase = repo._phasecache.phase
         first = min(cl.rev(n) for n in repo._phasecache.phaseroots[secret])
         revs = cl.revs(start=first)
         secrets = set(r for r in revs if getphase(repo, r) >= secret)
         return frozenset(hiddens | secrets)
     else:
         return hiddens
 
 def computemutable(repo):
     """compute the set of revision that should be filtered when used a server
 
     Secret and hidden changeset should not pretend to be here."""
     assert not repo.changelog.filteredrevs
     # fast check to avoid revset call on huge repo
     if any(repo._phasecache.phaseroots[1:]):
         getphase = repo._phasecache.phase
         maymutable = filterrevs(repo, 'base')
         return frozenset(r for r in maymutable if getphase(repo, r))
     return frozenset()
 
 def computeimpactable(repo):
     """Everything impactable by mutable revision
 
     The immutable filter still have some chance to get invalidated. This will
     happen when:
 
     - you garbage collect hidden changeset,
     - public phase is moved backward,
     - something is changed in the filtering (this could be fixed)
 
     This filter out any mutable changeset and any public changeset that may be
     impacted by something happening to a mutable revision.
 
     This is achieved by filtered everything with a revision number egal or
     higher than the first mutable changeset is filtered."""
     assert not repo.changelog.filteredrevs
     cl = repo.changelog
     firstmutable = len(cl)
     for roots in repo._phasecache.phaseroots[1:]:
         if roots:
             firstmutable = min(firstmutable, min(cl.rev(r) for r in roots))
     # protect from nullrev root
     firstmutable = max(0, firstmutable)
     return frozenset(xrange(firstmutable, len(cl)))
 
 # function to compute filtered set
 #
 # When adding a new filter you MUST update the table at:
 #     mercurial.branchmap.subsettable
 # Otherwise your filter will have to recompute all its branches cache
 # from scratch (very slow).
 filtertable = {'visible': computehidden,
                'served': computeunserved,
                'immutable':  computemutable,
                'base':  computeimpactable}
 
 def filterrevs(repo, filtername):
     """returns set of filtered revision for this filter name"""
     if filtername not in repo.filteredrevcache:
         func = filtertable[filtername]
         repo.filteredrevcache[filtername] = func(repo.unfiltered())
     return repo.filteredrevcache[filtername]
 
 class repoview(object):
     """Provide a read/write view of a repo through a filtered changelog
 
     This object is used to access a filtered version of a repository without
     altering the original repository object itself. We can not alter the
     original object for two main reasons:
     - It prevents the use of a repo with multiple filters at the same time. In
       particular when multiple threads are involved.
     - It makes scope of the filtering harder to control.
 
     This object behaves very closely to the original repository. All attribute
     operations are done on the original repository:
     - An access to `repoview.someattr` actually returns `repo.someattr`,
     - A write to `repoview.someattr` actually sets value of `repo.someattr`,
     - A deletion of `repoview.someattr` actually drops `someattr`
       from `repo.__dict__`.
 
     The only exception is the `changelog` property. It is overridden to return
     a (surface) copy of `repo.changelog` with some revisions filtered. The
     `filtername` attribute of the view control the revisions that need to be
     filtered.  (the fact the changelog is copied is an implementation detail).
 
     Unlike attributes, this object intercepts all method calls. This means that
     all methods are run on the `repoview` object with the filtered `changelog`
     property. For this purpose the simple `repoview` class must be mixed with
     the actual class of the repository. This ensures that the resulting
     `repoview` object have the very same methods than the repo object. This
     leads to the property below.
 
         repoview.method() --> repo.__class__.method(repoview)
 
     The inheritance has to be done dynamically because `repo` can be of any
     subclasses of `localrepo`. Eg: `bundlerepo` or `statichttprepo`.
     """
 
     def __init__(self, repo, filtername):
         object.__setattr__(self, '_unfilteredrepo', repo)
         object.__setattr__(self, 'filtername', filtername)
         object.__setattr__(self, '_clcachekey', None)
         object.__setattr__(self, '_clcache', None)
 
     # not a propertycache on purpose we shall implement a proper cache later
     @property
     def changelog(self):
         """return a filtered version of the changeset
 
         this changelog must not be used for writing"""
         # some cache may be implemented later
         unfi = self._unfilteredrepo
         unfichangelog = unfi.changelog
         # bypass call to changelog.method
         unfiindex = unfichangelog.index
         unfilen = len(unfiindex) - 1
         unfinode = unfiindex[unfilen - 1][7]
 
         revs = filterrevs(unfi, self.filtername)
         cl = self._clcache
         newkey = (unfilen, unfinode, hash(revs), unfichangelog._delayed)
         if cl is not None and newkey != self._clcachekey:
             cl = None
         # could have been made None by the previous if
         if cl is None:
             cl = copy.copy(unfichangelog)
             cl.filteredrevs = revs
             object.__setattr__(self, '_clcache', cl)
             object.__setattr__(self, '_clcachekey', newkey)
         return cl
 
     def unfiltered(self):
         """Return an unfiltered version of a repo"""
         return self._unfilteredrepo
 
     def filtered(self, name):
         """Return a filtered version of a repository"""
         if name == self.filtername:
             return self
         return self.unfiltered().filtered(name)
 
     # everything access are forwarded to the proxied repo
     def __getattr__(self, attr):
         return getattr(self._unfilteredrepo, attr)
 
     def __setattr__(self, attr, value):
         return setattr(self._unfilteredrepo, attr, value)
 
     def __delattr__(self, attr):
         return delattr(self._unfilteredrepo, attr)
 
     # The `requirements` attribute is initialized during __init__. But
     # __getattr__ won't be called as it also exists on the class. We need
     # explicit forwarding to main repo here
     @property
     def requirements(self):
         return self._unfilteredrepo.requirements

tests/test-obsolete.t

@@ -1,991 +1,1008
   $ cat >> $HGRCPATH << EOF
   > [phases]
   > # public changeset are not obsolete
   > publish=false
   > [ui]
   > logtemplate="{rev}:{node|short} ({phase}) [{tags} {bookmarks}] {desc|firstline}\n"
   > [experimental]
   > # drop me once bundle2 is the default,
   > # added to get test change early.
   > bundle2-exp = True
   > EOF
   $ mkcommit() {
   >    echo "$1" > "$1"
   >    hg add "$1"
   >    hg ci -m "add $1"
   > }
   $ getid() {
   >    hg log -T "{node}\n" --hidden -r "desc('$1')"
   > }
 
   $ cat > debugkeys.py <<EOF
   > def reposetup(ui, repo):
   >     class debugkeysrepo(repo.__class__):
   >         def listkeys(self, namespace):
   >             ui.write('listkeys %s\n' % (namespace,))
   >             return super(debugkeysrepo, self).listkeys(namespace)
   > 
   >     if repo.local():
   >         repo.__class__ = debugkeysrepo
   > EOF
 
   $ hg init tmpa
   $ cd tmpa
   $ mkcommit kill_me
 
 Checking that the feature is properly disabled
 
   $ hg debugobsolete -d '0 0' `getid kill_me` -u babar
   abort: creating obsolete markers is not enabled on this repo
   [255]
 
 Enabling it
 
   $ cat >> $HGRCPATH << EOF
   > [experimental]
   > evolution=createmarkers,exchange
   > EOF
 
 Killing a single changeset without replacement
 
   $ hg debugobsolete 0
   abort: changeset references must be full hexadecimal node identifiers
   [255]
   $ hg debugobsolete '00'
   abort: changeset references must be full hexadecimal node identifiers
   [255]
   $ hg debugobsolete -d '0 0' `getid kill_me` -u babar
   $ hg debugobsolete
   97b7c2d76b1845ed3eb988cd612611e72406cef0 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'babar'}
 
 (test that mercurial is not confused)
 
   $ hg up null --quiet # having 0 as parent prevents it to be hidden
   $ hg tip
   -1:000000000000 (public) [tip ] 
   $ hg up --hidden tip --quiet
 
 Killing a single changeset with itself should fail
 (simple local safeguard)
 
   $ hg debugobsolete `getid kill_me` `getid kill_me`
   abort: bad obsmarker input: in-marker cycle with 97b7c2d76b1845ed3eb988cd612611e72406cef0
   [255]
 
   $ cd ..
 
 Killing a single changeset with replacement
 (and testing the format option)
 
   $ hg init tmpb
   $ cd tmpb
   $ mkcommit a
   $ mkcommit b
   $ mkcommit original_c
   $ hg up "desc('b')"
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ mkcommit new_c
   created new head
   $ hg log -r 'hidden()' --template '{rev}:{node|short} {desc}\n' --hidden
   $ hg debugobsolete --config format.obsstore-version=0 --flag 12 `getid original_c`  `getid new_c` -d '121 120'
   $ hg log -r 'hidden()' --template '{rev}:{node|short} {desc}\n' --hidden
   2:245bde4270cd add original_c
   $ hg debugrevlog -cd
   # rev p1rev p2rev start   end deltastart base   p1   p2 rawsize totalsize compression heads chainlen
       0    -1    -1     0    59          0    0    0    0      58        58           0     1        0
       1     0    -1    59   118         59   59    0    0      58       116           0     1        0
       2     1    -1   118   193        118  118   59    0      76       192           0     1        0
       3     1    -1   193   260        193  193   59    0      66       258           0     2        0
   $ hg debugobsolete
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
 
 (check for version number of the obsstore)
 
   $ dd bs=1 count=1 if=.hg/store/obsstore 2>/dev/null
   \x00 (no-eol) (esc)
 
 do it again (it read the obsstore before adding new changeset)
 
   $ hg up '.^'
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ mkcommit new_2_c
   created new head
   $ hg debugobsolete -d '1337 0' `getid new_c` `getid new_2_c`
   $ hg debugobsolete
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
 
 Register two markers with a missing node
 
   $ hg up '.^'
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ mkcommit new_3_c
   created new head
   $ hg debugobsolete -d '1338 0' `getid new_2_c` 1337133713371337133713371337133713371337
   $ hg debugobsolete -d '1339 0' 1337133713371337133713371337133713371337 `getid new_3_c`
   $ hg debugobsolete
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
 
 Refuse pathological nullid successors
   $ hg debugobsolete -d '9001 0' 1337133713371337133713371337133713371337 0000000000000000000000000000000000000000
   transaction abort!
   rollback completed
   abort: bad obsolescence marker detected: invalid successors nullid
   [255]
 
 Check that graphlog detect that a changeset is obsolete:
 
   $ hg log -G
   @  5:5601fb93a350 (draft) [tip ] add new_3_c
   |
   o  1:7c3bad9141dc (draft) [ ] add b
   |
   o  0:1f0dee641bb7 (draft) [ ] add a
   
 
 check that heads does not report them
 
   $ hg heads
   5:5601fb93a350 (draft) [tip ] add new_3_c
   $ hg heads --hidden
   5:5601fb93a350 (draft) [tip ] add new_3_c
   4:ca819180edb9 (draft) [ ] add new_2_c
   3:cdbce2fbb163 (draft) [ ] add new_c
   2:245bde4270cd (draft) [ ] add original_c
 
 
 check that summary does not report them
 
   $ hg init ../sink
   $ echo '[paths]' >> .hg/hgrc
   $ echo 'default=../sink' >> .hg/hgrc
   $ hg summary --remote
   parent: 5:5601fb93a350 tip
    add new_3_c
   branch: default
   commit: (clean)
   update: (current)
   phases: 3 draft
   remote: 3 outgoing
 
   $ hg summary --remote --hidden
   parent: 5:5601fb93a350 tip
    add new_3_c
   branch: default
   commit: (clean)
   update: 3 new changesets, 4 branch heads (merge)
   phases: 6 draft
   remote: 3 outgoing
 
 check that various commands work well with filtering
 
   $ hg tip
   5:5601fb93a350 (draft) [tip ] add new_3_c
   $ hg log -r 6
   abort: unknown revision '6'!
   [255]
   $ hg log -r 4
   abort: hidden revision '4'!
   (use --hidden to access hidden revisions)
   [255]
   $ hg debugrevspec 'rev(6)'
   $ hg debugrevspec 'rev(4)'
   $ hg debugrevspec 'null'
   -1
 
 Check that public changeset are not accounted as obsolete:
 
   $ hg --hidden phase --public 2
   $ hg log -G
   @  5:5601fb93a350 (draft) [tip ] add new_3_c
   |
   | o  2:245bde4270cd (public) [ ] add original_c
   |/
   o  1:7c3bad9141dc (public) [ ] add b
   |
   o  0:1f0dee641bb7 (public) [ ] add a
   
 
 And that bumped changeset are detected
 --------------------------------------
 
 If we didn't filtered obsolete changesets out, 3 and 4 would show up too. Also
 note that the bumped changeset (5:5601fb93a350) is not a direct successor of
 the public changeset
 
   $ hg log --hidden -r 'bumped()'
   5:5601fb93a350 (draft) [tip ] add new_3_c
 
 And that we can't push bumped changeset
 
   $ hg push ../tmpa -r 0 --force #(make repo related)
   pushing to ../tmpa
   searching for changes
   warning: repository is unrelated
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files (+1 heads)
   $ hg push ../tmpa
   pushing to ../tmpa
   searching for changes
   abort: push includes bumped changeset: 5601fb93a350!
   [255]
 
 Fixing "bumped" situation
 We need to create a clone of 5 and add a special marker with a flag
 
   $ hg summary
   parent: 5:5601fb93a350 tip
    add new_3_c
   branch: default
   commit: (clean)
   update: 1 new changesets, 2 branch heads (merge)
   phases: 1 draft
   bumped: 1 changesets
   $ hg up '5^'
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg revert -ar 5
   adding new_3_c
   $ hg ci -m 'add n3w_3_c'
   created new head
   $ hg debugobsolete -d '1338 0' --flags 1 `getid new_3_c` `getid n3w_3_c`
   $ hg log -r 'bumped()'
   $ hg log -G
   @  6:6f9641995072 (draft) [tip ] add n3w_3_c
   |
   | o  2:245bde4270cd (public) [ ] add original_c
   |/
   o  1:7c3bad9141dc (public) [ ] add b
   |
   o  0:1f0dee641bb7 (public) [ ] add a
   
 
   $ cd ..
 
 Revision 0 is hidden
 --------------------
 
   $ hg init rev0hidden
   $ cd rev0hidden
 
   $ mkcommit kill0
   $ hg up -q null
   $ hg debugobsolete `getid kill0`
   $ mkcommit a
   $ mkcommit b
 
 Should pick the first visible revision as "repo" node
 
   $ hg archive ../archive-null
   $ cat ../archive-null/.hg_archival.txt
   repo: 1f0dee641bb7258c56bd60e93edfa2405381c41e
   node: 7c3bad9141dcb46ff89abf5f61856facd56e476c
   branch: default
   latesttag: null
   latesttagdistance: 2
   changessincelatesttag: 2
 
 
   $ cd ..
 
 Exchange Test
 ============================
 
 Destination repo does not have any data
 ---------------------------------------
 
 Simple incoming test
 
   $ hg init tmpc
   $ cd tmpc
   $ hg incoming ../tmpb
   comparing with ../tmpb
   0:1f0dee641bb7 (public) [ ] add a
   1:7c3bad9141dc (public) [ ] add b
   2:245bde4270cd (public) [ ] add original_c
   6:6f9641995072 (draft) [tip ] add n3w_3_c
 
 Try to pull markers
 (extinct changeset are excluded but marker are pushed)
 
   $ hg pull ../tmpb
   pulling from ../tmpb
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 4 changesets with 4 changes to 4 files (+1 heads)
   5 new obsolescence markers
   (run 'hg heads' to see heads, 'hg merge' to merge)
   $ hg debugobsolete
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
 
 Rollback//Transaction support
 
   $ hg debugobsolete -d '1340 0' aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
   $ hg debugobsolete
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb 0 (Thu Jan 01 00:22:20 1970 +0000) {'user': 'test'}
   $ hg rollback -n
   repository tip rolled back to revision 3 (undo debugobsolete)
   $ hg rollback
   repository tip rolled back to revision 3 (undo debugobsolete)
   $ hg debugobsolete
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
 
   $ cd ..
 
 Try to push markers
 
   $ hg init tmpd
   $ hg -R tmpb push tmpd
   pushing to tmpd
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 4 changesets with 4 changes to 4 files (+1 heads)
   5 new obsolescence markers
   $ hg -R tmpd debugobsolete | sort
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
 
 Check obsolete keys are exchanged only if source has an obsolete store
 
   $ hg init empty
   $ hg --config extensions.debugkeys=debugkeys.py -R empty push tmpd
   pushing to tmpd
   listkeys phases
   listkeys bookmarks
   no changes found
   listkeys phases
   [1]
 
 clone support
 (markers are copied and extinct changesets are included to allow hardlinks)
 
   $ hg clone tmpb clone-dest
   updating to branch default
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg -R clone-dest log -G --hidden
   @  6:6f9641995072 (draft) [tip ] add n3w_3_c
   |
   | x  5:5601fb93a350 (draft) [ ] add new_3_c
   |/
   | x  4:ca819180edb9 (draft) [ ] add new_2_c
   |/
   | x  3:cdbce2fbb163 (draft) [ ] add new_c
   |/
   | o  2:245bde4270cd (public) [ ] add original_c
   |/
   o  1:7c3bad9141dc (public) [ ] add b
   |
   o  0:1f0dee641bb7 (public) [ ] add a
   
   $ hg -R clone-dest debugobsolete
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
 
 
 Destination repo have existing data
 ---------------------------------------
 
 On pull
 
   $ hg init tmpe
   $ cd tmpe
   $ hg debugobsolete -d '1339 0' 1339133913391339133913391339133913391339 ca819180edb99ed25ceafb3e9584ac287e240b00
   $ hg pull ../tmpb
   pulling from ../tmpb
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 4 changesets with 4 changes to 4 files (+1 heads)
   5 new obsolescence markers
   (run 'hg heads' to see heads, 'hg merge' to merge)
   $ hg debugobsolete
   1339133913391339133913391339133913391339 ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
 
 
 On push
 
   $ hg push ../tmpc
   pushing to ../tmpc
   searching for changes
   no changes found
   1 new obsolescence markers
   [1]
   $ hg -R ../tmpc debugobsolete
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
   1339133913391339133913391339133913391339 ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
 
 detect outgoing obsolete and unstable
 ---------------------------------------
 
 
   $ hg log -G
   o  3:6f9641995072 (draft) [tip ] add n3w_3_c
   |
   | o  2:245bde4270cd (public) [ ] add original_c
   |/
   o  1:7c3bad9141dc (public) [ ] add b
   |
   o  0:1f0dee641bb7 (public) [ ] add a
   
   $ hg up 'desc("n3w_3_c")'
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ mkcommit original_d
   $ mkcommit original_e
   $ hg debugobsolete --record-parents `getid original_d` -d '0 0'
   $ hg debugobsolete | grep `getid original_d`
   94b33453f93bdb8d457ef9b770851a618bf413e1 0 {6f96419950729f3671185b847352890f074f7557} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   $ hg log -r 'obsolete()'
   4:94b33453f93b (draft) [ ] add original_d
   $ hg summary
   parent: 5:cda648ca50f5 tip
    add original_e
   branch: default
   commit: (clean)
   update: 1 new changesets, 2 branch heads (merge)
   phases: 3 draft
   unstable: 1 changesets
   $ hg log -G -r '::unstable()'
   @  5:cda648ca50f5 (draft) [tip ] add original_e
   |
   x  4:94b33453f93b (draft) [ ] add original_d
   |
   o  3:6f9641995072 (draft) [ ] add n3w_3_c
   |
   o  1:7c3bad9141dc (public) [ ] add b
   |
   o  0:1f0dee641bb7 (public) [ ] add a
   
 
 refuse to push obsolete changeset
 
   $ hg push ../tmpc/ -r 'desc("original_d")'
   pushing to ../tmpc/
   searching for changes
   abort: push includes obsolete changeset: 94b33453f93b!
   [255]
 
 refuse to push unstable changeset
 
   $ hg push ../tmpc/
   pushing to ../tmpc/
   searching for changes
   abort: push includes unstable changeset: cda648ca50f5!
   [255]
 
 Test that extinct changeset are properly detected
 
   $ hg log -r 'extinct()'
 
 Don't try to push extinct changeset
 
   $ hg init ../tmpf
   $ hg out  ../tmpf
   comparing with ../tmpf
   searching for changes
   0:1f0dee641bb7 (public) [ ] add a
   1:7c3bad9141dc (public) [ ] add b
   2:245bde4270cd (public) [ ] add original_c
   3:6f9641995072 (draft) [ ] add n3w_3_c
   4:94b33453f93b (draft) [ ] add original_d
   5:cda648ca50f5 (draft) [tip ] add original_e
   $ hg push ../tmpf -f # -f because be push unstable too
   pushing to ../tmpf
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 6 changesets with 6 changes to 6 files (+1 heads)
   7 new obsolescence markers
 
 no warning displayed
 
   $ hg push ../tmpf
   pushing to ../tmpf
   searching for changes
   no changes found
   [1]
 
 Do not warn about new head when the new head is a successors of a remote one
 
   $ hg log -G
   @  5:cda648ca50f5 (draft) [tip ] add original_e
   |
   x  4:94b33453f93b (draft) [ ] add original_d
   |
   o  3:6f9641995072 (draft) [ ] add n3w_3_c
   |
   | o  2:245bde4270cd (public) [ ] add original_c
   |/
   o  1:7c3bad9141dc (public) [ ] add b
   |
   o  0:1f0dee641bb7 (public) [ ] add a
   
   $ hg up -q 'desc(n3w_3_c)'
   $ mkcommit obsolete_e
   created new head
   $ hg debugobsolete `getid 'original_e'` `getid 'obsolete_e'`
   $ hg outgoing ../tmpf # parasite hg outgoing testin
   comparing with ../tmpf
   searching for changes
   6:3de5eca88c00 (draft) [tip ] add obsolete_e
   $ hg push ../tmpf
   pushing to ../tmpf
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files (+1 heads)
   1 new obsolescence markers
 
 test relevance computation
 ---------------------------------------
 
 Checking simple case of "marker relevance".
 
 
 Reminder of the repo situation
 
   $ hg log --hidden --graph
   @  6:3de5eca88c00 (draft) [tip ] add obsolete_e
   |
   | x  5:cda648ca50f5 (draft) [ ] add original_e
   | |
   | x  4:94b33453f93b (draft) [ ] add original_d
   |/
   o  3:6f9641995072 (draft) [ ] add n3w_3_c
   |
   | o  2:245bde4270cd (public) [ ] add original_c
   |/
   o  1:7c3bad9141dc (public) [ ] add b
   |
   o  0:1f0dee641bb7 (public) [ ] add a
   
 
 List of all markers
 
   $ hg debugobsolete
   1339133913391339133913391339133913391339 ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
   94b33453f93bdb8d457ef9b770851a618bf413e1 0 {6f96419950729f3671185b847352890f074f7557} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   cda648ca50f50482b7055c0b0c4c117bba6733d9 3de5eca88c00aa039da7399a220f4a5221faa585 0 (*) {'user': 'test'} (glob)
 
 List of changesets with no chain
 
   $ hg debugobsolete --hidden --rev ::2
 
 List of changesets that are included on marker chain
 
   $ hg debugobsolete --hidden --rev 6
   cda648ca50f50482b7055c0b0c4c117bba6733d9 3de5eca88c00aa039da7399a220f4a5221faa585 0 (*) {'user': 'test'} (glob)
 
 List of changesets with a longer chain, (including a pruned children)
 
   $ hg debugobsolete --hidden --rev 3
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   1339133913391339133913391339133913391339 ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   94b33453f93bdb8d457ef9b770851a618bf413e1 0 {6f96419950729f3671185b847352890f074f7557} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
 
 List of both
 
   $ hg debugobsolete --hidden --rev 3::6
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   1339133913391339133913391339133913391339 ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:19 1970 +0000) {'user': 'test'}
   245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f C (Thu Jan 01 00:00:01 1970 -0002) {'user': 'test'}
   5601fb93a350734d935195fee37f4054c529ff39 6f96419950729f3671185b847352890f074f7557 1 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   94b33453f93bdb8d457ef9b770851a618bf413e1 0 {6f96419950729f3671185b847352890f074f7557} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 (Thu Jan 01 00:22:18 1970 +0000) {'user': 'test'}
   cda648ca50f50482b7055c0b0c4c117bba6733d9 3de5eca88c00aa039da7399a220f4a5221faa585 0 (*) {'user': 'test'} (glob)
   cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 (Thu Jan 01 00:22:17 1970 +0000) {'user': 'test'}
 
 #if serve
 
 Test the debug output for exchange
 ----------------------------------
 
   $ hg pull ../tmpb --config 'experimental.obsmarkers-exchange-debug=True' --config 'experimental.bundle2-exp=True'
   pulling from ../tmpb
   searching for changes
   no changes found
   obsmarker-exchange: 346 bytes received
 
 check hgweb does not explode
 ====================================
 
   $ hg unbundle $TESTDIR/bundles/hgweb+obs.hg
   adding changesets
   adding manifests
   adding file changes
   added 62 changesets with 63 changes to 9 files (+60 heads)
   (run 'hg heads .' to see heads, 'hg merge' to merge)
   $ for node in `hg log -r 'desc(babar_)' --template '{node}\n'`;
   > do
   >    hg debugobsolete $node
   > done
   $ hg up tip
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
   $ cat hg.pid >> $DAEMON_PIDS
 
 check changelog view
 
   $ get-with-headers.py --headeronly localhost:$HGPORT 'shortlog/'
   200 Script output follows
 
 check graph view
 
   $ get-with-headers.py --headeronly localhost:$HGPORT 'graph'
   200 Script output follows
 
 check filelog view
 
   $ get-with-headers.py --headeronly localhost:$HGPORT 'log/'`hg log -r . -T "{node}"`/'babar'
   200 Script output follows
 
   $ get-with-headers.py --headeronly localhost:$HGPORT 'rev/68'
   200 Script output follows
   $ get-with-headers.py --headeronly localhost:$HGPORT 'rev/67'
   404 Not Found
   [1]
 
 check that web.view config option:
 
   $ killdaemons.py hg.pid
   $ cat >> .hg/hgrc << EOF
   > [web]
   > view=all
   > EOF
   $ wait
   $ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
   $ get-with-headers.py --headeronly localhost:$HGPORT 'rev/67'
   200 Script output follows
   $ killdaemons.py hg.pid
 
 Checking _enable=False warning if obsolete marker exists
 
   $ echo '[experimental]' >> $HGRCPATH
   $ echo "evolution=" >> $HGRCPATH
   $ hg log -r tip
   obsolete feature not enabled but 68 markers found!
   68:c15e9edfca13 (draft) [tip ] add celestine
 
 reenable for later test
 
   $ echo '[experimental]' >> $HGRCPATH
   $ echo "evolution=createmarkers,exchange" >> $HGRCPATH
 
 #endif
 
 Test incoming/outcoming with changesets obsoleted remotely, known locally
 ===============================================================================
 
 This test issue 3805
 
   $ hg init repo-issue3805
   $ cd repo-issue3805
   $ echo "base" > base
   $ hg ci -Am "base"
   adding base
   $ echo "foo" > foo
   $ hg ci -Am "A"
   adding foo
   $ hg clone . ../other-issue3805
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo "bar" >> foo
   $ hg ci --amend
   $ cd ../other-issue3805
   $ hg log -G
   @  1:29f0c6921ddd (draft) [tip ] A
   |
   o  0:d20a80d4def3 (draft) [ ] base
   
   $ hg log -G -R ../repo-issue3805
   @  3:323a9c3ddd91 (draft) [tip ] A
   |
   o  0:d20a80d4def3 (draft) [ ] base
   
   $ hg incoming
   comparing with $TESTTMP/tmpe/repo-issue3805 (glob)
   searching for changes
   3:323a9c3ddd91 (draft) [tip ] A
   $ hg incoming --bundle ../issue3805.hg
   comparing with $TESTTMP/tmpe/repo-issue3805 (glob)
   searching for changes
   3:323a9c3ddd91 (draft) [tip ] A
   $ hg outgoing
   comparing with $TESTTMP/tmpe/repo-issue3805 (glob)
   searching for changes
   1:29f0c6921ddd (draft) [tip ] A
 
 #if serve
 
   $ hg serve -R ../repo-issue3805 -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ hg incoming http://localhost:$HGPORT
   comparing with http://localhost:$HGPORT/
   searching for changes
   2:323a9c3ddd91 (draft) [tip ] A
   $ hg outgoing http://localhost:$HGPORT
   comparing with http://localhost:$HGPORT/
   searching for changes
   1:29f0c6921ddd (draft) [tip ] A
 
   $ killdaemons.py
 
 #endif
 
 This test issue 3814
 
 (nothing to push but locally hidden changeset)
 
   $ cd ..
   $ hg init repo-issue3814
   $ cd repo-issue3805
   $ hg push -r 323a9c3ddd91 ../repo-issue3814
   pushing to ../repo-issue3814
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 2 files
   2 new obsolescence markers
   $ hg out ../repo-issue3814
   comparing with ../repo-issue3814
   searching for changes
   no changes found
   [1]
 
 Test that a local tag blocks a changeset from being hidden
 
   $ hg tag -l visible -r 1 --hidden
   $ hg log -G
   @  3:323a9c3ddd91 (draft) [tip ] A
   |
   | x  1:29f0c6921ddd (draft) [visible ] A
   |/
   o  0:d20a80d4def3 (draft) [ ] base
   
 Test that removing a local tag does not cause some commands to fail
 
   $ hg tag -l -r tip tiptag
   $ hg tags
   tiptag                             3:323a9c3ddd91
   tip                                3:323a9c3ddd91
   visible                            1:29f0c6921ddd
   $ hg --config extensions.strip= strip -r tip --no-backup
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg tags
   visible                            1:29f0c6921ddd
   tip                                1:29f0c6921ddd
 
 Test bundle overlay onto hidden revision
 
   $ cd ..
   $ hg init repo-bundleoverlay
   $ cd repo-bundleoverlay
   $ echo "A" > foo
   $ hg ci -Am "A"
   adding foo
   $ echo "B" >> foo
   $ hg ci -m "B"
   $ hg up 0
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo "C" >> foo
   $ hg ci -m "C"
   created new head
   $ hg log -G
   @  2:c186d7714947 (draft) [tip ] C
   |
   | o  1:44526ebb0f98 (draft) [ ] B
   |/
   o  0:4b34ecfb0d56 (draft) [ ] A
   
 
   $ hg clone -r1 . ../other-bundleoverlay
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 1 files
   updating to branch default
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd ../other-bundleoverlay
   $ echo "B+" >> foo
   $ hg ci --amend -m "B+"
   $ hg log -G --hidden
   @  3:b7d587542d40 (draft) [tip ] B+
   |
   | x  2:eb95e9297e18 (draft) [ ] temporary amend commit for 44526ebb0f98
   | |
   | x  1:44526ebb0f98 (draft) [ ] B
   |/
   o  0:4b34ecfb0d56 (draft) [ ] A
   
 
   $ hg incoming ../repo-bundleoverlay --bundle ../bundleoverlay.hg
   comparing with ../repo-bundleoverlay
   searching for changes
   1:44526ebb0f98 (draft) [ ] B
   2:c186d7714947 (draft) [tip ] C
   $ hg log -G -R ../bundleoverlay.hg
   o  4:c186d7714947 (draft) [tip ] C
   |
   | @  3:b7d587542d40 (draft) [ ] B+
   |/
   o  0:4b34ecfb0d56 (draft) [ ] A
   
 
 #if serve
 
 Test issue 4506
 
   $ cd ..
   $ hg init repo-issue4506
   $ cd repo-issue4506
   $ echo "0" > foo
   $ hg add foo
   $ hg ci -m "content-0"
 
   $ hg up null
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo "1" > bar
   $ hg add bar
   $ hg ci -m "content-1"
   created new head
   $ hg up 0
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg graft 1
   grafting 1:1c9eddb02162 "content-1" (tip)
 
   $ hg debugobsolete `hg log -r1 -T'{node}'` `hg log -r2 -T'{node}'`
 
   $ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ get-with-headers.py --headeronly localhost:$HGPORT 'rev/1'
   404 Not Found
   [1]
   $ get-with-headers.py --headeronly localhost:$HGPORT 'file/tip/bar'
   200 Script output follows
   $ get-with-headers.py --headeronly localhost:$HGPORT 'annotate/tip/bar'
   200 Script output follows
 
   $ killdaemons.py
 
 #endif
 
 Test heads computation on pending index changes with obsolescence markers
   $ cd ..
   $ cat >$TESTTMP/test_extension.py  << EOF
   > from mercurial import cmdutil
   > from mercurial.i18n import _
   > 
   > cmdtable = {}
   > command = cmdutil.command(cmdtable)
   > @command("amendtransient",[], _('hg amendtransient [rev]'))
   > def amend(ui, repo, *pats, **opts):
   >   def commitfunc(ui, repo, message, match, opts):
   >     return repo.commit(message, repo['.'].user(), repo['.'].date(), match)
   >   opts['message'] = 'Test'
   >   opts['logfile'] = None
   >   cmdutil.amend(ui, repo, commitfunc, repo['.'], {}, pats, opts)
   >   print repo.changelog.headrevs()
   > EOF
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > testextension=$TESTTMP/test_extension.py
   > EOF
   $ hg init repo-issue-nativerevs-pending-changes
   $ cd repo-issue-nativerevs-pending-changes
   $ mkcommit a
   $ mkcommit b
   $ hg up ".^"
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo aa > a
   $ hg amendtransient
   [1, 3]
 
+Check that corrupted hidden cache does not crash
+
+  $ printf "" > .hg/cache/hidden
+  $ hg log -r . -T '{node}' --debug
+  corrupted hidden cache
+  8fd96dfc63e51ed5a8af1bec18eb4b19dbf83812 (no-eol)
+  $ hg log -r . -T '{node}' --debug
+  8fd96dfc63e51ed5a8af1bec18eb4b19dbf83812 (no-eol)
+
+Check that wrong hidden cache permission does not crash
+
+  $ chmod 000 .hg/cache/hidden
+  $ hg log -r . -T '{node}' --debug
+  cannot read hidden cache
+  error writing hidden changesets cache
+  8fd96dfc63e51ed5a8af1bec18eb4b19dbf83812 (no-eol)
+
 Test cache consistency for the visible filter
 1) We want to make sure that the cached filtered revs are invalidated when
 bookmarks change
   $ cd ..
   $ cat >$TESTTMP/test_extension.py  << EOF
   > from mercurial import cmdutil, extensions, bookmarks, repoview
   > def _bookmarkchanged(orig, bkmstoreinst, *args, **kwargs):
   >  repo = bkmstoreinst._repo
   >  ret = orig(bkmstoreinst, *args, **kwargs)
   >  hidden1 = repoview.computehidden(repo)
   >  hidden = repoview.filterrevs(repo, 'visible')
   >  if sorted(hidden1) != sorted(hidden):
   >    print "cache inconsistency"
   >  return ret
   > def extsetup(ui):
   >   extensions.wrapfunction(bookmarks.bmstore, 'write', _bookmarkchanged)
   > EOF
 
   $ hg init repo-cache-inconsistency
   $ cd repo-issue-nativerevs-pending-changes
   $ mkcommit a
   a already tracked!
   $ mkcommit b
   $ hg id
   13bedc178fce tip
   $ echo "hello" > b
   $ hg commit --amend -m "message"
   $ hg book bookb -r 13bedc178fce --hidden
   $ hg log -r 13bedc178fce
   5:13bedc178fce (draft) [ bookb] add b
   $ hg book -d bookb
   $ hg log -r 13bedc178fce
   abort: hidden revision '13bedc178fce'!
   (use --hidden to access hidden revisions)
   [255]