From: Michael Haggerty <mhagger@alum.mit.edu>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org, Michael Haggerty <mhagger@alum.mit.edu>
Subject: [PATCH v2 16/33] t3210: test for spurious error messages for dangling packed refs
Date: Mon, 22 Apr 2013 21:52:24 +0200 [thread overview]
Message-ID: <1366660361-21831-17-git-send-email-mhagger@alum.mit.edu> (raw)
In-Reply-To: <1366660361-21831-1-git-send-email-mhagger@alum.mit.edu>
A packed reference can be overridden by a loose reference, in which
case the packed reference is obsolete and is never used. The object
pointed to by such a reference can be garbage collected. Since
d66da478f2, this could lead to the emission of a spurious error
message:
error: refs/heads/master does not point to a valid object!
The error is generated by repack_without_ref() if there is an obsolete
dangling packed reference in packed-refs when the packed-refs file has
to be rewritten due to the deletion of another packed reference. Add
a failing test demonstrating this problem and some passing tests of
related scenarios.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
---
t/t3210-pack-refs.sh | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/t/t3210-pack-refs.sh b/t/t3210-pack-refs.sh
index cd04361..c032d88 100755
--- a/t/t3210-pack-refs.sh
+++ b/t/t3210-pack-refs.sh
@@ -118,4 +118,40 @@ test_expect_success 'pack, prune and repack' '
test_cmp all-of-them again
'
+test_expect_success 'explicit pack-refs with dangling packed reference' '
+ git commit --allow-empty -m "soon to be garbage-collected" &&
+ git pack-refs --all &&
+ git reset --hard HEAD^ &&
+ sleep 1 &&
+ git reflog expire --expire=now --all &&
+ git prune --expire=now &&
+ git pack-refs --all 2>result &&
+ test_cmp /dev/null result
+'
+
+test_expect_success 'delete ref with dangling packed version' '
+ git checkout -b lamb &&
+ git commit --allow-empty -m "future garbage" &&
+ git pack-refs --all &&
+ git reset --hard HEAD^ &&
+ git checkout master &&
+ sleep 1 &&
+ git reflog expire --expire=now --all &&
+ git prune --expire=now &&
+ git branch -d lamb 2>result &&
+ test_cmp /dev/null result
+'
+
+test_expect_failure 'delete ref while another dangling packed ref' '
+ git branch lamb &&
+ git commit --allow-empty -m "future garbage" &&
+ git pack-refs --all &&
+ git reset --hard HEAD^ &&
+ sleep 1 &&
+ git reflog expire --expire=now --all &&
+ git prune --expire=now &&
+ git branch -d lamb 2>result &&
+ test_cmp /dev/null result
+'
+
test_done
--
1.8.2.1
next prev parent reply other threads:[~2013-04-22 20:01 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-22 19:52 [PATCH v2 00/33] Various cleanups around reference packing and peeling Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 01/33] refs: document flags constants REF_* Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 02/33] refs: document the fields of struct ref_value Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 03/33] refs: document do_for_each_ref() and do_one_ref() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 04/33] refs: document how current_ref is used Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 05/33] refs: define constant PEELED_LINE_LENGTH Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 06/33] do_for_each_ref_in_dirs(): remove dead code Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 07/33] get_packed_ref(): return a ref_entry Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 08/33] peel_ref(): use function get_packed_ref() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 09/33] repack_without_ref(): " Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 10/33] refs: extract a function ref_resolves_to_object() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 11/33] refs: extract function peel_object() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 12/33] peel_object(): give more specific information in return value Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 13/33] peel_ref(): fix return value for non-peelable, not-current reference Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 14/33] refs: extract a function peel_entry() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 15/33] refs: change the internal reference-iteration API Michael Haggerty
2013-04-22 19:52 ` Michael Haggerty [this message]
2013-04-22 19:52 ` [PATCH v2 17/33] repack_without_ref(): silence errors for dangling packed refs Michael Haggerty
2013-04-22 22:21 ` Junio C Hamano
2013-04-22 19:52 ` [PATCH v2 18/33] search_ref_dir(): return an index rather than a pointer Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 19/33] refs: change how packed refs are deleted Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 20/33] t3211: demonstrate loss of peeled refs if a packed ref is deleted Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 21/33] repack_without_ref(): write peeled refs in the rewritten file Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 22/33] refs: extract a function write_packed_entry() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 23/33] pack-refs: rename handle_one_ref() to pack_one_ref() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 24/33] pack-refs: merge code from pack-refs.{c,h} into refs.{c,h} Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 25/33] pack_one_ref(): rename "path" parameter to "refname" Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 26/33] refs: use same lock_file object for both ref-packing functions Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 27/33] pack_refs(): change to use do_for_each_entry() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 28/33] refs: inline function do_not_prune() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 29/33] pack_one_ref(): use function peel_entry() Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 30/33] pack_one_ref(): use write_packed_entry() to do the writing Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 31/33] pack_one_ref(): do some cheap tests before a more expensive one Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 32/33] refs: change do_for_each_*() functions to take ref_cache arguments Michael Haggerty
2013-04-22 19:52 ` [PATCH v2 33/33] refs: handle the main ref_cache specially Michael Haggerty
2013-04-22 22:23 ` [PATCH v2 00/33] Various cleanups around reference packing and peeling Junio C Hamano
2013-04-23 9:15 ` [PATCH] fixup! t3210: test for spurious error messages for dangling packed refs Michael Haggerty
2013-04-23 17:50 ` Junio C Hamano
2013-04-24 15:25 ` Michael Haggerty
2013-04-27 5:43 ` Michael Haggerty
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1366660361-21831-17-git-send-email-mhagger@alum.mit.edu \
--to=mhagger@alum.mit.edu \
--cc=git@vger.kernel.org \
--cc=gitster@pobox.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).