branches: correctly show inactive multiheaded branches

Issue being fixed here: `hg branches` incorrectly renders inactive multiheaded
branches as active if they have closed heads.

Example:

```
$ hg log --template '{rev}:{node|short} "{desc}" ({branch}) [parents: {parents}]\n'
4:2e2fa7af8357 "merge" (default) [parents: 0:c94e548c8c7d 3:7be622ae5832 ]
3:7be622ae5832 "2" (somebranch) [parents: 1:81c1d9458987 ]
2:be82cf30409c "close" (somebranch) [parents: ]
1:81c1d9458987 "1" (somebranch) [parents: ]
0:c94e548c8c7d "initial" (default) [parents: ]

$ hg branches
default                        4:2e2fa7af8357
somebranch                     3:7be622ae5832
```

Branch `somebranch` have two heads, the 1st one being closed (rev 2) and
the other one being merged into default (rev 3). This branch should be shown as
inactive one.

This happens because we intersect branch heads with repo heads to check branch
activity. In this case intersection in a set with one node (rev 2). This head
is closed but the branch is marked as active nevertheless.

Fix is to check branch activity by intersecting only open heads set.

Fixed output:

```
$ hg branches
default                        4:2e2fa7af8357
somebranch                     3:7be622ae5832 (inactive)
```

Relevant tests for multihead branches added to test-branches suite.

Implentation note about adding `iteropen` method:

At first I have tried to modify `iterbranches` is such a way that it would
filter out closed heads itself. For example it could have `closed=False`
parameter. But in this case we would have to filter closed tips as well.
Reasoning in terms of `hg branches` we actually are not allowed to do this.

Also, we need to do heads filtering only if tip is not closed itself. But if it
is - we are ok to skip filtering, because branch is already known to be inactive.

So we can't implement heads filtering in `iterbranches` in elegant way, because
we will end up with something like `closed_heads=False` or even
`closed_heads_is_tip_is_open`. Finally I decided to move this logic to the
`branches` function, adding `iteropen` helper method.

Differential Revision: https://phab.mercurial-scm.org/D583

mercurial/branchmap.py

@@ -211,10 +211,13 b' class branchcache(dict):'
         Raise KeyError for unknown branch.'''
         return self._branchtip(self[branch])[0]
 
+    def iteropen(self, nodes):
+        return (n for n in nodes if n not in self._closednodes)
+
     def branchheads(self, branch, closed=False):
         heads = self[branch]
         if not closed:
-            heads = [h for h in heads if h not in self._closednodes]
+            heads = list(self.iteropen(heads))
         return heads
 
     def iterbranches(self):

mercurial/commands.py

@@ -1077,7 +1077,10 b' def branches(ui, repo, active=False, clo'
     allheads = set(repo.heads())
     branches = []
     for tag, heads, tip, isclosed in repo.branchmap().iterbranches():
-        isactive = not isclosed and bool(set(heads) & allheads)
+        isactive = False
+        if not isclosed:
+            openheads = set(repo.branchmap().iteropen(heads))
+            isactive = bool(openheads & allheads)
         branches.append((tag, repo[tip], isactive, not isclosed))
     branches.sort(key=lambda i: (i[2], i[1].rev(), i[0], i[3]),
                   reverse=True)

tests/test-branches.t

@@ -418,6 +418,131 b' branch b'
   date:        Thu Jan 01 00:00:09 1970 +0000
   summary:     prune bad branch
   
+
+reclose branch
+
+  $ hg up -C c
+  3 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  $ hg commit -d '9 0' --close-branch -m 'reclosing this branch'
+  $ hg branches
+  b                             13:e23b5505d1ad
+  a branch name much longer than the default justification used by branches 7:10ff5895aa57
+  a                              5:d8cbc61dbaa6 (inactive)
+  default                        0:19709c5a4e75 (inactive)
+  $ hg branches --closed
+  b                             13:e23b5505d1ad
+  a branch name much longer than the default justification used by branches 7:10ff5895aa57
+  c                             14:f894c25619d3 (closed)
+  a                              5:d8cbc61dbaa6 (inactive)
+  default                        0:19709c5a4e75 (inactive)
+
+multihead branch
+
+  $ hg up -C default
+  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
+  $ hg branch m
+  marked working directory as branch m
+  $ touch m
+  $ hg add m
+  $ hg commit -d '10 0' -m 'multihead base'
+  $ echo "m1" >m
+  $ hg commit -d '10 0' -m 'head 1'
+  $ hg up -C '.^'
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ echo "m2" >m
+  $ hg commit -d '10 0' -m 'head 2'
+  created new head
+  $ hg log -b m
+  changeset:   17:df343b0df04f
+  branch:      m
+  tag:         tip
+  parent:      15:f3447637f53e
+  user:        test
+  date:        Thu Jan 01 00:00:10 1970 +0000
+  summary:     head 2
+  
+  changeset:   16:a58ca5d3bdf3
+  branch:      m
+  user:        test
+  date:        Thu Jan 01 00:00:10 1970 +0000
+  summary:     head 1
+  
+  changeset:   15:f3447637f53e
+  branch:      m
+  parent:      0:19709c5a4e75
+  user:        test
+  date:        Thu Jan 01 00:00:10 1970 +0000
+  summary:     multihead base
+  
+  $ hg heads --topo m
+  changeset:   17:df343b0df04f
+  branch:      m
+  tag:         tip
+  parent:      15:f3447637f53e
+  user:        test
+  date:        Thu Jan 01 00:00:10 1970 +0000
+  summary:     head 2
+  
+  changeset:   16:a58ca5d3bdf3
+  branch:      m
+  user:        test
+  date:        Thu Jan 01 00:00:10 1970 +0000
+  summary:     head 1
+  
+  $ hg branches
+  m                             17:df343b0df04f
+  b                             13:e23b5505d1ad
+  a branch name much longer than the default justification used by branches 7:10ff5895aa57
+  a                              5:d8cbc61dbaa6 (inactive)
+  default                        0:19709c5a4e75 (inactive)
+
+partially merge multihead branch
+
+  $ hg up -C default
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg branch md
+  marked working directory as branch md
+  $ hg merge m
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+  $ hg commit -d '11 0' -m 'merge head 2'
+  $ hg heads --topo m
+  changeset:   16:a58ca5d3bdf3
+  branch:      m
+  user:        test
+  date:        Thu Jan 01 00:00:10 1970 +0000
+  summary:     head 1
+  
+  $ hg branches
+  md                            18:c914c99f1fbb
+  m                             17:df343b0df04f
+  b                             13:e23b5505d1ad
+  a branch name much longer than the default justification used by branches 7:10ff5895aa57
+  a                              5:d8cbc61dbaa6 (inactive)
+  default                        0:19709c5a4e75 (inactive)
+
+partially close multihead branch
+
+  $ hg up -C a58ca5d3bdf3
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg commit -d '12 0' -m 'close head 1' --close-branch
+  $ hg heads --topo m
+  changeset:   19:cd21a80baa3d
+  branch:      m
+  tag:         tip
+  parent:      16:a58ca5d3bdf3
+  user:        test
+  date:        Thu Jan 01 00:00:12 1970 +0000
+  summary:     close head 1
+  
+  $ hg branches
+  md                            18:c914c99f1fbb
+  b                             13:e23b5505d1ad
+  a branch name much longer than the default justification used by branches 7:10ff5895aa57
+  m                             17:df343b0df04f (inactive)
+  a                              5:d8cbc61dbaa6 (inactive)
+  default                        0:19709c5a4e75 (inactive)
+
 default branch colors:
 
   $ cat <<EOF >> $HGRCPATH
@@ -427,22 +552,23 b' default branch colors:'
   > mode = ansi
   > EOF
 
-  $ hg up -C c
-  3 files updated, 0 files merged, 2 files removed, 0 files unresolved
-  $ hg commit -d '9 0' --close-branch -m 'reclosing this branch'
   $ hg up -C b
-  2 files updated, 0 files merged, 3 files removed, 0 files unresolved
+  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg branches --color=always
+  \x1b[0;0mmd\x1b[0m\x1b[0;33m                            18:c914c99f1fbb\x1b[0m (esc)
   \x1b[0;32mb\x1b[0m\x1b[0;33m                             13:e23b5505d1ad\x1b[0m (esc)
   \x1b[0;0ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;33m 7:10ff5895aa57\x1b[0m (esc)
+  \x1b[0;0mm\x1b[0m\x1b[0;33m                             17:df343b0df04f\x1b[0m (inactive) (esc)
   \x1b[0;0ma\x1b[0m\x1b[0;33m                              5:d8cbc61dbaa6\x1b[0m (inactive) (esc)
   \x1b[0;0mdefault\x1b[0m\x1b[0;33m                        0:19709c5a4e75\x1b[0m (inactive) (esc)
 
 default closed branch color:
 
   $ hg branches --color=always --closed
+  \x1b[0;0mmd\x1b[0m\x1b[0;33m                            18:c914c99f1fbb\x1b[0m (esc)
   \x1b[0;32mb\x1b[0m\x1b[0;33m                             13:e23b5505d1ad\x1b[0m (esc)
   \x1b[0;0ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;33m 7:10ff5895aa57\x1b[0m (esc)
+  \x1b[0;0mm\x1b[0m\x1b[0;33m                             17:df343b0df04f\x1b[0m (inactive) (esc)
   \x1b[0;30;1mc\x1b[0m\x1b[0;33m                             14:f894c25619d3\x1b[0m (closed) (esc)
   \x1b[0;0ma\x1b[0m\x1b[0;33m                              5:d8cbc61dbaa6\x1b[0m (inactive) (esc)
   \x1b[0;0mdefault\x1b[0m\x1b[0;33m                        0:19709c5a4e75\x1b[0m (inactive) (esc)
@@ -461,16 +587,20 b' default closed branch color:'
 custom branch colors:
 
   $ hg branches --color=always
+  \x1b[0;32mmd\x1b[0m\x1b[0;36m                            18:c914c99f1fbb\x1b[0m (esc)
   \x1b[0;31mb\x1b[0m\x1b[0;36m                             13:e23b5505d1ad\x1b[0m (esc)
   \x1b[0;32ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;36m 7:10ff5895aa57\x1b[0m (esc)
+  \x1b[0;35mm\x1b[0m\x1b[0;36m                             17:df343b0df04f\x1b[0m (inactive) (esc)
   \x1b[0;35ma\x1b[0m\x1b[0;36m                              5:d8cbc61dbaa6\x1b[0m (inactive) (esc)
   \x1b[0;35mdefault\x1b[0m\x1b[0;36m                        0:19709c5a4e75\x1b[0m (inactive) (esc)
 
 custom closed branch color:
 
   $ hg branches --color=always --closed
+  \x1b[0;32mmd\x1b[0m\x1b[0;36m                            18:c914c99f1fbb\x1b[0m (esc)
   \x1b[0;31mb\x1b[0m\x1b[0;36m                             13:e23b5505d1ad\x1b[0m (esc)
   \x1b[0;32ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;36m 7:10ff5895aa57\x1b[0m (esc)
+  \x1b[0;35mm\x1b[0m\x1b[0;36m                             17:df343b0df04f\x1b[0m (inactive) (esc)
   \x1b[0;34mc\x1b[0m\x1b[0;36m                             14:f894c25619d3\x1b[0m (closed) (esc)
   \x1b[0;35ma\x1b[0m\x1b[0;36m                              5:d8cbc61dbaa6\x1b[0m (inactive) (esc)
   \x1b[0;35mdefault\x1b[0m\x1b[0;36m                        0:19709c5a4e75\x1b[0m (inactive) (esc)
@@ -481,6 +611,14 b' template output:'
   [
    {
     "active": true,
+    "branch": "md",
+    "closed": false,
+    "current": false,
+    "node": "c914c99f1fbb2b1d785a0a939ed3f67275df18e9",
+    "rev": 18
+   },
+   {
+    "active": true,
     "branch": "b",
     "closed": false,
     "current": true,
@@ -497,6 +635,14 b' template output:'
    },
    {
     "active": false,
+    "branch": "m",
+    "closed": false,
+    "current": false,
+    "node": "df343b0df04feb2a946cd4b6e9520e552fef14ee",
+    "rev": 17
+   },
+   {
+    "active": false,
     "branch": "c",
     "closed": true,
     "current": false,
@@ -525,8 +671,10 b' template output:'
   c
 
   $ hg branches -T '{word(0, branch)}: {desc|firstline}\n'
+  md: merge head 2
   b: reopen branch with a change
   a: Adding d branch
+  m: head 2
   a: Adding b branch head 2
   default: Adding root node
 
@@ -538,8 +686,10 b' template output:'
   > EOF
   $ hg branches -T "$TESTTMP/map-myjson"
   {
+   {"branch": "md", "node": "c914c99f1fbb"},
    {"branch": "b", "node": "e23b5505d1ad"},
    {"branch": "a branch *", "node": "10ff5895aa57"}, (glob)
+   {"branch": "m", "node": "df343b0df04f"},
    {"branch": "a", "node": "d8cbc61dbaa6"},
    {"branch": "default", "node": "19709c5a4e75"}
   }
@@ -553,8 +703,10 b' template output:'
   > EOF
   $ hg branches -T myjson
   {
+   {"branch": "md", "node": "c914c99f1fbb"},
    {"branch": "b", "node": "e23b5505d1ad"},
    {"branch": "a branch *", "node": "10ff5895aa57"}, (glob)
+   {"branch": "m", "node": "df343b0df04f"},
    {"branch": "a", "node": "d8cbc61dbaa6"},
    {"branch": "default", "node": "19709c5a4e75"}
   }
@@ -564,8 +716,10 b' template output:'
   > :docheader = 'should not be selected as a docheader for literal templates\n'
   > EOF
   $ hg branches -T '{branch}\n'
+  md
   b
   a branch name much longer than the default justification used by branches
+  m
   a
   default
 
@@ -579,14 +733,14 b' revision branch cache is created when bu'
   $ rm -rf .hg/cache; hg head a -T '{rev}\n'
   5
   $ f --hexdump --size .hg/cache/rbc-*
-  .hg/cache/rbc-names-v1: size=87
+  .hg/cache/rbc-names-v1: size=92
   0000: 64 65 66 61 75 6c 74 00 61 00 62 00 63 00 61 20 |default.a.b.c.a |
   0010: 62 72 61 6e 63 68 20 6e 61 6d 65 20 6d 75 63 68 |branch name much|
   0020: 20 6c 6f 6e 67 65 72 20 74 68 61 6e 20 74 68 65 | longer than the|
   0030: 20 64 65 66 61 75 6c 74 20 6a 75 73 74 69 66 69 | default justifi|
   0040: 63 61 74 69 6f 6e 20 75 73 65 64 20 62 79 20 62 |cation used by b|
-  0050: 72 61 6e 63 68 65 73                            |ranches|
-  .hg/cache/rbc-revs-v1: size=120
+  0050: 72 61 6e 63 68 65 73 00 6d 00 6d 64             |ranches.m.md|
+  .hg/cache/rbc-revs-v1: size=160
   0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....|
   0010: 88 1f e2 b9 00 00 00 01 ac 22 03 33 00 00 00 02 |.........".3....|
   0020: ae e3 9c d1 00 00 00 02 d8 cb c6 1d 00 00 00 01 |................|
@@ -594,7 +748,9 b' revision branch cache is created when bu'
   0040: ee bb 94 44 00 00 00 02 5f 40 61 bb 00 00 00 02 |...D...._@a.....|
   0050: bf be 84 1b 00 00 00 02 d3 f1 63 45 80 00 00 02 |..........cE....|
   0060: e3 d4 9c 05 80 00 00 02 e2 3b 55 05 00 00 00 02 |.........;U.....|
-  0070: f8 94 c2 56 80 00 00 03                         |...V....|
+  0070: f8 94 c2 56 80 00 00 03 f3 44 76 37 00 00 00 05 |...V.....Dv7....|
+  0080: a5 8c a5 d3 00 00 00 05 df 34 3b 0d 00 00 00 05 |.........4;.....|
+  0090: c9 14 c9 9f 00 00 00 06 cd 21 a8 0b 80 00 00 05 |.........!......|
 
 no errors when revbranchcache is not writable
 
@@ -622,9 +778,9 b' recovery from invalid cache revs file wi'
   $ echo >> .hg/cache/rbc-revs-v1
   $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
   5
-  truncating cache/rbc-revs-v1 to 120
+  truncating cache/rbc-revs-v1 to 160
   $ f --size .hg/cache/rbc-revs*
-  .hg/cache/rbc-revs-v1: size=120
+  .hg/cache/rbc-revs-v1: size=160
 recovery from invalid cache file with partial last record
   $ mv .hg/cache/rbc-revs-v1 .
   $ f -qDB 119 rbc-revs-v1 > .hg/cache/rbc-revs-v1
@@ -634,14 +790,14 b' recovery from invalid cache file with pa'
   5
   truncating cache/rbc-revs-v1 to 112
   $ f --size .hg/cache/rbc-revs*
-  .hg/cache/rbc-revs-v1: size=120
+  .hg/cache/rbc-revs-v1: size=160
 recovery from invalid cache file with missing record - no truncation
   $ mv .hg/cache/rbc-revs-v1 .
   $ f -qDB 112 rbc-revs-v1 > .hg/cache/rbc-revs-v1
   $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
   5
   $ f --size .hg/cache/rbc-revs*
-  .hg/cache/rbc-revs-v1: size=120
+  .hg/cache/rbc-revs-v1: size=160
 recovery from invalid cache file with some bad records
   $ mv .hg/cache/rbc-revs-v1 .
   $ f -qDB 8 rbc-revs-v1 > .hg/cache/rbc-revs-v1
@@ -658,29 +814,29 b' recovery from invalid cache file with so'
   5
   truncating cache/rbc-revs-v1 to 104
   $ f --size --hexdump --bytes=16 .hg/cache/rbc-revs*
-  .hg/cache/rbc-revs-v1: size=120
+  .hg/cache/rbc-revs-v1: size=160
   0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....|
 cache is updated when committing
   $ hg branch i-will-regret-this
   marked working directory as branch i-will-regret-this
   $ hg ci -m regrets
   $ f --size .hg/cache/rbc-*
-  .hg/cache/rbc-names-v1: size=106
-  .hg/cache/rbc-revs-v1: size=128
+  .hg/cache/rbc-names-v1: size=111
+  .hg/cache/rbc-revs-v1: size=168
 update after rollback - the cache will be correct but rbc-names will will still
 contain the branch name even though it no longer is used
   $ hg up -qr '.^'
   $ hg rollback -qf
   $ f --size --hexdump .hg/cache/rbc-*
-  .hg/cache/rbc-names-v1: size=106
+  .hg/cache/rbc-names-v1: size=111
   0000: 64 65 66 61 75 6c 74 00 61 00 62 00 63 00 61 20 |default.a.b.c.a |
   0010: 62 72 61 6e 63 68 20 6e 61 6d 65 20 6d 75 63 68 |branch name much|
   0020: 20 6c 6f 6e 67 65 72 20 74 68 61 6e 20 74 68 65 | longer than the|
   0030: 20 64 65 66 61 75 6c 74 20 6a 75 73 74 69 66 69 | default justifi|
   0040: 63 61 74 69 6f 6e 20 75 73 65 64 20 62 79 20 62 |cation used by b|
-  0050: 72 61 6e 63 68 65 73 00 69 2d 77 69 6c 6c 2d 72 |ranches.i-will-r|
-  0060: 65 67 72 65 74 2d 74 68 69 73                   |egret-this|
-  .hg/cache/rbc-revs-v1: size=120
+  0050: 72 61 6e 63 68 65 73 00 6d 00 6d 64 00 69 2d 77 |ranches.m.md.i-w|
+  0060: 69 6c 6c 2d 72 65 67 72 65 74 2d 74 68 69 73    |ill-regret-this|
+  .hg/cache/rbc-revs-v1: size=160
   0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....|
   0010: 88 1f e2 b9 00 00 00 01 ac 22 03 33 00 00 00 02 |.........".3....|
   0020: ae e3 9c d1 00 00 00 02 d8 cb c6 1d 00 00 00 01 |................|
@@ -688,12 +844,14 b' contain the branch name even though it n'
   0040: ee bb 94 44 00 00 00 02 5f 40 61 bb 00 00 00 02 |...D...._@a.....|
   0050: bf be 84 1b 00 00 00 02 d3 f1 63 45 80 00 00 02 |..........cE....|
   0060: e3 d4 9c 05 80 00 00 02 e2 3b 55 05 00 00 00 02 |.........;U.....|
-  0070: f8 94 c2 56 80 00 00 03                         |...V....|
+  0070: f8 94 c2 56 80 00 00 03 f3 44 76 37 00 00 00 05 |...V.....Dv7....|
+  0080: a5 8c a5 d3 00 00 00 05 df 34 3b 0d 00 00 00 05 |.........4;.....|
+  0090: c9 14 c9 9f 00 00 00 06 cd 21 a8 0b 80 00 00 05 |.........!......|
 cache is updated/truncated when stripping - it is thus very hard to get in a
 situation where the cache is out of sync and the hash check detects it
   $ hg --config extensions.strip= strip -r tip --nob
   $ f --size .hg/cache/rbc-revs*
-  .hg/cache/rbc-revs-v1: size=112
+  .hg/cache/rbc-revs-v1: size=152
 
 cache is rebuilt when corruption is detected
   $ echo > .hg/cache/rbc-names-v1
@@ -701,13 +859,14 b' cache is rebuilt when corruption is dete'
   referenced branch names not found - rebuilding revision branch cache from scratch
   8 9 10 11 12 13 truncating cache/rbc-revs-v1 to 40
   $ f --size --hexdump .hg/cache/rbc-*
-  .hg/cache/rbc-names-v1: size=79
+  .hg/cache/rbc-names-v1: size=84
   0000: 62 00 61 00 63 00 61 20 62 72 61 6e 63 68 20 6e |b.a.c.a branch n|
   0010: 61 6d 65 20 6d 75 63 68 20 6c 6f 6e 67 65 72 20 |ame much longer |
   0020: 74 68 61 6e 20 74 68 65 20 64 65 66 61 75 6c 74 |than the default|
   0030: 20 6a 75 73 74 69 66 69 63 61 74 69 6f 6e 20 75 | justification u|
-  0040: 73 65 64 20 62 79 20 62 72 61 6e 63 68 65 73    |sed by branches|
-  .hg/cache/rbc-revs-v1: size=112
+  0040: 73 65 64 20 62 79 20 62 72 61 6e 63 68 65 73 00 |sed by branches.|
+  0050: 6d 00 6d 64                                     |m.md|
+  .hg/cache/rbc-revs-v1: size=152
   0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
   0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
   0020: 00 00 00 00 00 00 00 00 d8 cb c6 1d 00 00 00 01 |................|
@@ -715,6 +874,9 b' cache is rebuilt when corruption is dete'
   0040: ee bb 94 44 00 00 00 00 5f 40 61 bb 00 00 00 00 |...D...._@a.....|
   0050: bf be 84 1b 00 00 00 00 d3 f1 63 45 80 00 00 00 |..........cE....|
   0060: e3 d4 9c 05 80 00 00 00 e2 3b 55 05 00 00 00 00 |.........;U.....|
+  0070: f8 94 c2 56 80 00 00 02 f3 44 76 37 00 00 00 04 |...V.....Dv7....|
+  0080: a5 8c a5 d3 00 00 00 04 df 34 3b 0d 00 00 00 04 |.........4;.....|
+  0090: c9 14 c9 9f 00 00 00 05                         |........|
 
 Test that cache files are created and grows correctly:
 
@@ -724,7 +886,7 b' Test that cache files are created and gr'
   $ f --size --hexdump .hg/cache/rbc-*
   .hg/cache/rbc-names-v1: size=1
   0000: 61                                              |a|
-  .hg/cache/rbc-revs-v1: size=112
+  .hg/cache/rbc-revs-v1: size=152
   0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
   0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
   0020: 00 00 00 00 00 00 00 00 d8 cb c6 1d 00 00 00 00 |................|
@@ -732,6 +894,9 b' Test that cache files are created and gr'
   0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
   0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
   0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
+  0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
+  0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
+  0090: 00 00 00 00 00 00 00 00                         |........|
 
   $ cd ..