revlog: automatically read from opened file handles
The revlog reading code commonly opens a new file handle for
reading on demand. There is support for passing a file handle
to revlog.revision(). But it is marked as an internal argument.
When revlogs are written, we write() data as it is available. But
we don't flush() data until all revisions are written.
Putting these two traits together, it is possible for an in-process
revlog reader during active writes to trigger the opening of a new
file handle on a file with unflushed writes. The reader won't have
access to all "available" revlog data (as it hasn't been flushed).
And with the introduction of the previous patch, this can lead to
the revlog raising an error due to a partial read.
I witnessed this behavior when applying changegroup data (via
`hg pull`) before issue6006 was fixed via different means. Having
this and the previous patch in play would have helped cause errors
earlier rather than manifesting as hash verification failures.
While this has been a long-standing issue, I believe the relatively
new delta computation code has tickled it into being more common.
This is because the new delta computation code will compute deltas
in more scenarios. This can lead to revlog reading. While the delta
computation code is probably supposed to reuse file handles, it
appears it isn't doing so in all circumstances.
But the issue runs deeper than that. Theoretically, any code can
access revision data during revlog writes. It appears we were just
getting lucky that it wasn't. (The "add revision callback" passed to
addgroup() provides an avenue to do this.)
If I changed the revlog's behavior to not cache the full revision
text or to clear caches after revision insertion during addgroup(),
I was able to produce crashes 100% of the time when writing changelog
revisions. This is because changelog's add revision callback attempts
to resolve the revision data to access the changed files list. And
without the revision's fulltext being cached, we performed a revlog
read, which required opening a new file handle. This attempted to read
unflushed data, leading to a partial read and a crash.
This commit teaches the revlog to store the file handles used for
writing multiple revisions during addgroup(). It also teaches the
code for resolving a file handle when reading to use these handles,
if available. This ensures that *any* reads (regardless of their
source) use the active writing file handles, if available. These
file handles have access to the unflushed data because they wrote it.
This allows reads to complete without issue.
Differential Revision: https://phab.mercurial-scm.org/D5267
$ cat <<EOF >> $HGRCPATH
> [extensions]
> mq =
> [diff]
> nodates = true
> EOF
$ catpatch() {
> cat .hg/patches/$1.patch | sed -e "s/^diff \-r [0-9a-f]* /diff -r ... /" \
> -e "s/^\(# Parent \).*/\1/"
> }
$ catlog() {
> catpatch $1
> hg log --template "{rev}: {node|short} {desc} - {author}\n"
> }
$ catlogd() {
> catpatch $1
> hg log --template "{rev}: {node|short} {desc} - {author} - {date}\n"
> }
$ drop() {
> hg qpop
> hg qdel $1.patch
> }
$ runtest() {
> echo ==== init
> hg init a
> cd a
> hg qinit
>
>
> echo ==== qnew -d
> hg qnew -d '3 0' 1.patch
> catlogd 1
>
> echo ==== qref
> echo "1" >1
> hg add
> hg qref
> catlogd 1
>
> echo ==== qref -d
> hg qref -d '4 0'
> catlogd 1
>
>
> echo ==== qnew
> hg qnew 2.patch
> echo "2" >2
> hg add
> hg qref
> catlog 2
>
> echo ==== qref -d
> hg qref -d '5 0'
> catlog 2
>
> drop 2
>
>
> echo ==== qnew -d -m
> hg qnew -d '6 0' -m "Three" 3.patch
> catlogd 3
>
> echo ==== qref
> echo "3" >3
> hg add
> hg qref
> catlogd 3
>
> echo ==== qref -m
> hg qref -m "Drei"
> catlogd 3
>
> echo ==== qref -d
> hg qref -d '7 0'
> catlogd 3
>
> echo ==== qref -d -m
> hg qref -d '8 0' -m "Three (again)"
> catlogd 3
>
>
> echo ==== qnew -m
> hg qnew -m "Four" 4.patch
> echo "4" >4
> hg add
> hg qref
> catlog 4
>
> echo ==== qref -d
> hg qref -d '9 0'
> catlog 4
>
> drop 4
>
>
> echo ==== qnew with HG header
> hg qnew --config 'mq.plain=true' 5.patch
> hg qpop
> echo "# HG changeset patch" >>.hg/patches/5.patch
> echo "# Date 10 0" >>.hg/patches/5.patch
> hg qpush 2>&1 | grep 'Now at'
> catlogd 5
>
> echo ==== hg qref
> echo "5" >5
> hg add
> hg qref
> catlogd 5
>
> echo ==== hg qref -d
> hg qref -d '11 0'
> catlogd 5
>
>
> echo ==== qnew with plain header
> hg qnew --config 'mq.plain=true' -d '12 0' 6.patch
> hg qpop
> hg qpush 2>&1 | grep 'now at'
> catlog 6
>
> echo ==== hg qref
> echo "6" >6
> hg add
> hg qref
> catlogd 6
>
> echo ==== hg qref -d
> hg qref -d '13 0'
> catlogd 6
>
> drop 6
>
>
> echo ==== qnew -u
> hg qnew -u jane 6.patch
> echo "6" >6
> hg add
> hg qref
> catlog 6
>
> echo ==== qref -d
> hg qref -d '12 0'
> catlog 6
>
> drop 6
>
>
> echo ==== qnew -d
> hg qnew -d '13 0' 7.patch
> echo "7" >7
> hg add
> hg qref
> catlog 7
>
> echo ==== qref -u
> hg qref -u john
> catlogd 7
>
>
> echo ==== qnew
> hg qnew 8.patch
> echo "8" >8
> hg add
> hg qref
> catlog 8
>
> echo ==== qref -u -d
> hg qref -u john -d '14 0'
> catlog 8
>
> drop 8
>
>
> echo ==== qnew -m
> hg qnew -m "Nine" 9.patch
> echo "9" >9
> hg add
> hg qref
> catlog 9
>
> echo ==== qref -u -d
> hg qref -u john -d '15 0'
> catlog 9
>
> drop 9
>
>
> echo ==== "qpop -a / qpush -a"
> hg qpop -a
> hg qpush -a
> hg log --template "{rev}: {node|short} {desc} - {author} - {date}\n"
> }
======= plain headers
$ echo "[mq]" >> $HGRCPATH
$ echo "plain=true" >> $HGRCPATH
$ mkdir sandbox
$ (cd sandbox ; runtest)
==== init
==== qnew -d
Date: 3 0
0: 758bd2596a39 [mq]: 1.patch - test - 3.00
==== qref
adding 1
Date: 3 0
diff -r ... 1
--- /dev/null
+++ b/1
@@ -0,0 +1,1 @@
+1
0: 8c640e9949a8 [mq]: 1.patch - test - 3.00
==== qref -d
Date: 4 0
diff -r ... 1
--- /dev/null
+++ b/1
@@ -0,0 +1,1 @@
+1
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qnew
adding 2
diff -r ... 2
--- /dev/null
+++ b/2
@@ -0,0 +1,1 @@
+2
1: fc7e8a2f6499 [mq]: 2.patch - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -d
Date: 5 0
diff -r ... 2
--- /dev/null
+++ b/2
@@ -0,0 +1,1 @@
+2
1: 1d9a6a118fd1 [mq]: 2.patch - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 2.patch
now at: 1.patch
==== qnew -d -m
Date: 6 0
Three
1: 2a9ef0bdefba Three - test - 6.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qref
adding 3
Date: 6 0
Three
diff -r ... 3
--- /dev/null
+++ b/3
@@ -0,0 +1,1 @@
+3
1: 7f19ad9eea7b Three - test - 6.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qref -m
Date: 6 0
Drei
diff -r ... 3
--- /dev/null
+++ b/3
@@ -0,0 +1,1 @@
+3
1: 7ff7377793e3 Drei - test - 6.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qref -d
Date: 7 0
Drei
diff -r ... 3
--- /dev/null
+++ b/3
@@ -0,0 +1,1 @@
+3
1: d89d3144f518 Drei - test - 7.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qref -d -m
Date: 8 0
Three (again)
diff -r ... 3
--- /dev/null
+++ b/3
@@ -0,0 +1,1 @@
+3
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qnew -m
adding 4
Four
diff -r ... 4
--- /dev/null
+++ b/4
@@ -0,0 +1,1 @@
+4
2: 74ded07d166b Four - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -d
Date: 9 0
Four
diff -r ... 4
--- /dev/null
+++ b/4
@@ -0,0 +1,1 @@
+4
2: 1a651320cf8e Four - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 4.patch
now at: 3.patch
==== qnew with HG header
popping 5.patch
now at: 3.patch
# HG changeset patch
# Date 10 0
2: d16a272220d2 imported patch 5.patch - test - 10.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== hg qref
adding 5
# HG changeset patch
# Date 10 0
# Parent
diff -r ... 5
--- /dev/null
+++ b/5
@@ -0,0 +1,1 @@
+5
2: 5dbf69c07df9 [mq]: 5.patch - test - 10.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== hg qref -d
# HG changeset patch
# Date 11 0
# Parent
diff -r ... 5
--- /dev/null
+++ b/5
@@ -0,0 +1,1 @@
+5
2: 049de6af0c1d [mq]: 5.patch - test - 11.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qnew with plain header
popping 6.patch
now at: 5.patch
now at: 6.patch
Date: 12 0
3: 8ad9ebc22b96 imported patch 6.patch - test
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== hg qref
adding 6
Date: 12 0
diff -r ... 6
--- /dev/null
+++ b/6
@@ -0,0 +1,1 @@
+6
3: 038c46b02a56 [mq]: 6.patch - test - 12.00
2: 049de6af0c1d [mq]: 5.patch - test - 11.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== hg qref -d
Date: 13 0
diff -r ... 6
--- /dev/null
+++ b/6
@@ -0,0 +1,1 @@
+6
3: 2785642ea4b4 [mq]: 6.patch - test - 13.00
2: 049de6af0c1d [mq]: 5.patch - test - 11.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
popping 6.patch
now at: 5.patch
==== qnew -u
adding 6
From: jane
diff -r ... 6
--- /dev/null
+++ b/6
@@ -0,0 +1,1 @@
+6
3: a05a33f187ce [mq]: 6.patch - jane
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -d
From: jane
Date: 12 0
diff -r ... 6
--- /dev/null
+++ b/6
@@ -0,0 +1,1 @@
+6
3: 5702c529dfe9 [mq]: 6.patch - jane
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 6.patch
now at: 5.patch
==== qnew -d
adding 7
Date: 13 0
diff -r ... 7
--- /dev/null
+++ b/7
@@ -0,0 +1,1 @@
+7
3: 8dd1eb8d4132 [mq]: 7.patch - test
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -u
From: john
Date: 13 0
diff -r ... 7
--- /dev/null
+++ b/7
@@ -0,0 +1,1 @@
+7
3: 4f9d07369cc4 [mq]: 7.patch - john - 13.00
2: 049de6af0c1d [mq]: 5.patch - test - 11.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qnew
adding 8
diff -r ... 8
--- /dev/null
+++ b/8
@@ -0,0 +1,1 @@
+8
4: 868b62f09492 [mq]: 8.patch - test
3: 4f9d07369cc4 [mq]: 7.patch - john
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -u -d
From: john
Date: 14 0
diff -r ... 8
--- /dev/null
+++ b/8
@@ -0,0 +1,1 @@
+8
4: b1e878ae55b9 [mq]: 8.patch - john
3: 4f9d07369cc4 [mq]: 7.patch - john
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 8.patch
now at: 7.patch
==== qnew -m
adding 9
Nine
diff -r ... 9
--- /dev/null
+++ b/9
@@ -0,0 +1,1 @@
+9
4: 7251936ac2bf Nine - test
3: 4f9d07369cc4 [mq]: 7.patch - john
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -u -d
From: john
Date: 15 0
Nine
diff -r ... 9
--- /dev/null
+++ b/9
@@ -0,0 +1,1 @@
+9
4: a0de5bf6e9f7 Nine - john
3: 4f9d07369cc4 [mq]: 7.patch - john
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 9.patch
now at: 7.patch
==== qpop -a / qpush -a
popping 7.patch
popping 5.patch
popping 3.patch
popping 1.patch
patch queue now empty
applying 1.patch
applying 3.patch
applying 5.patch
applying 7.patch
now at: 7.patch
3: d26a5b7ffce1 imported patch 7.patch - john - 13.00
2: dda6cf77060a imported patch 5.patch - test - 11.00
1: 25e32d66c8c7 Three (again) - test - 8.00
0: e5011c0211fe imported patch 1.patch - test - 4.00
$ rm -r sandbox
======= hg headers
$ echo "plain=false" >> $HGRCPATH
$ mkdir sandbox
$ (cd sandbox ; runtest)
==== init
==== qnew -d
# HG changeset patch
# Date 3 0
# Parent
0: 758bd2596a39 [mq]: 1.patch - test - 3.00
==== qref
adding 1
# HG changeset patch
# Date 3 0
# Parent
diff -r ... 1
--- /dev/null
+++ b/1
@@ -0,0 +1,1 @@
+1
0: 8c640e9949a8 [mq]: 1.patch - test - 3.00
==== qref -d
# HG changeset patch
# Date 4 0
# Parent
diff -r ... 1
--- /dev/null
+++ b/1
@@ -0,0 +1,1 @@
+1
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qnew
adding 2
# HG changeset patch
# Parent
diff -r ... 2
--- /dev/null
+++ b/2
@@ -0,0 +1,1 @@
+2
1: fc7e8a2f6499 [mq]: 2.patch - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -d
# HG changeset patch
# Date 5 0
# Parent
diff -r ... 2
--- /dev/null
+++ b/2
@@ -0,0 +1,1 @@
+2
1: 1d9a6a118fd1 [mq]: 2.patch - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 2.patch
now at: 1.patch
==== qnew -d -m
# HG changeset patch
# Date 6 0
# Parent
Three
1: 2a9ef0bdefba Three - test - 6.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qref
adding 3
# HG changeset patch
# Date 6 0
# Parent
Three
diff -r ... 3
--- /dev/null
+++ b/3
@@ -0,0 +1,1 @@
+3
1: 7f19ad9eea7b Three - test - 6.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qref -m
# HG changeset patch
# Date 6 0
# Parent
Drei
diff -r ... 3
--- /dev/null
+++ b/3
@@ -0,0 +1,1 @@
+3
1: 7ff7377793e3 Drei - test - 6.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qref -d
# HG changeset patch
# Date 7 0
# Parent
Drei
diff -r ... 3
--- /dev/null
+++ b/3
@@ -0,0 +1,1 @@
+3
1: d89d3144f518 Drei - test - 7.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qref -d -m
# HG changeset patch
# Date 8 0
# Parent
Three (again)
diff -r ... 3
--- /dev/null
+++ b/3
@@ -0,0 +1,1 @@
+3
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qnew -m
adding 4
# HG changeset patch
# Parent
Four
diff -r ... 4
--- /dev/null
+++ b/4
@@ -0,0 +1,1 @@
+4
2: 74ded07d166b Four - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -d
# HG changeset patch
# Date 9 0
# Parent
Four
diff -r ... 4
--- /dev/null
+++ b/4
@@ -0,0 +1,1 @@
+4
2: 1a651320cf8e Four - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 4.patch
now at: 3.patch
==== qnew with HG header
popping 5.patch
now at: 3.patch
# HG changeset patch
# Date 10 0
2: d16a272220d2 imported patch 5.patch - test - 10.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== hg qref
adding 5
# HG changeset patch
# Date 10 0
# Parent
diff -r ... 5
--- /dev/null
+++ b/5
@@ -0,0 +1,1 @@
+5
2: 5dbf69c07df9 [mq]: 5.patch - test - 10.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== hg qref -d
# HG changeset patch
# Date 11 0
# Parent
diff -r ... 5
--- /dev/null
+++ b/5
@@ -0,0 +1,1 @@
+5
2: 049de6af0c1d [mq]: 5.patch - test - 11.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qnew with plain header
popping 6.patch
now at: 5.patch
now at: 6.patch
Date: 12 0
3: 8ad9ebc22b96 imported patch 6.patch - test
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== hg qref
adding 6
Date: 12 0
diff -r ... 6
--- /dev/null
+++ b/6
@@ -0,0 +1,1 @@
+6
3: 038c46b02a56 [mq]: 6.patch - test - 12.00
2: 049de6af0c1d [mq]: 5.patch - test - 11.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== hg qref -d
Date: 13 0
diff -r ... 6
--- /dev/null
+++ b/6
@@ -0,0 +1,1 @@
+6
3: 2785642ea4b4 [mq]: 6.patch - test - 13.00
2: 049de6af0c1d [mq]: 5.patch - test - 11.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
popping 6.patch
now at: 5.patch
==== qnew -u
adding 6
# HG changeset patch
# User jane
# Parent
diff -r ... 6
--- /dev/null
+++ b/6
@@ -0,0 +1,1 @@
+6
3: a05a33f187ce [mq]: 6.patch - jane
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -d
# HG changeset patch
# User jane
# Date 12 0
# Parent
diff -r ... 6
--- /dev/null
+++ b/6
@@ -0,0 +1,1 @@
+6
3: 5702c529dfe9 [mq]: 6.patch - jane
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 6.patch
now at: 5.patch
==== qnew -d
adding 7
# HG changeset patch
# Date 13 0
# Parent
diff -r ... 7
--- /dev/null
+++ b/7
@@ -0,0 +1,1 @@
+7
3: 8dd1eb8d4132 [mq]: 7.patch - test
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -u
# HG changeset patch
# User john
# Date 13 0
# Parent
diff -r ... 7
--- /dev/null
+++ b/7
@@ -0,0 +1,1 @@
+7
3: 4f9d07369cc4 [mq]: 7.patch - john - 13.00
2: 049de6af0c1d [mq]: 5.patch - test - 11.00
1: b1b6b0fe0e6d Three (again) - test - 8.00
0: 4a67dfeea974 [mq]: 1.patch - test - 4.00
==== qnew
adding 8
# HG changeset patch
# Parent
diff -r ... 8
--- /dev/null
+++ b/8
@@ -0,0 +1,1 @@
+8
4: 868b62f09492 [mq]: 8.patch - test
3: 4f9d07369cc4 [mq]: 7.patch - john
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -u -d
# HG changeset patch
# User john
# Date 14 0
# Parent
diff -r ... 8
--- /dev/null
+++ b/8
@@ -0,0 +1,1 @@
+8
4: b1e878ae55b9 [mq]: 8.patch - john
3: 4f9d07369cc4 [mq]: 7.patch - john
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 8.patch
now at: 7.patch
==== qnew -m
adding 9
# HG changeset patch
# Parent
Nine
diff -r ... 9
--- /dev/null
+++ b/9
@@ -0,0 +1,1 @@
+9
4: 7251936ac2bf Nine - test
3: 4f9d07369cc4 [mq]: 7.patch - john
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
==== qref -u -d
# HG changeset patch
# User john
# Date 15 0
# Parent
Nine
diff -r ... 9
--- /dev/null
+++ b/9
@@ -0,0 +1,1 @@
+9
4: a0de5bf6e9f7 Nine - john
3: 4f9d07369cc4 [mq]: 7.patch - john
2: 049de6af0c1d [mq]: 5.patch - test
1: b1b6b0fe0e6d Three (again) - test
0: 4a67dfeea974 [mq]: 1.patch - test
popping 9.patch
now at: 7.patch
==== qpop -a / qpush -a
popping 7.patch
popping 5.patch
popping 3.patch
popping 1.patch
patch queue now empty
applying 1.patch
applying 3.patch
applying 5.patch
applying 7.patch
now at: 7.patch
3: d26a5b7ffce1 imported patch 7.patch - john - 13.00
2: dda6cf77060a imported patch 5.patch - test - 11.00
1: 25e32d66c8c7 Three (again) - test - 8.00
0: e5011c0211fe imported patch 1.patch - test - 4.00
$ rm -r sandbox