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t3210: test for spurious error messages for dangling packed refs

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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case the packed reference is obsolete and is never used.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>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty 2013-04-22 21:52:24 +02:00 committed by Junio C Hamano
parent 624cac3514
commit 0a0b8d1531
1 changed files with 33 additions and 0 deletions
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33
t/t3210-pack-refs.sh
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@ -118,4 +118,37 @@ 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^ &&
git reflog expire --expire=all --all &&
git prune --expire=all &&
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 &&
git reflog expire --expire=all --all &&
git prune --expire=all &&
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^ &&
git reflog expire --expire=all --all &&
git prune --expire=all &&
git branch -d lamb 2>result &&
test_cmp /dev/null result
'
test_done