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case the packed reference is obsolete and is never used.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 <mhag...@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
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