ref_transaction_commit(): fix atomicity and avoid fd exhaustion

diff --git a/t/t3203-branch-output.sh b/t/t3203-branch-output.sh
index ba4f98e800f262242ef7925f82dc8d13272fe3ca..f51d0f3cadcb4f97f4cf9f2d79aad9ed401781d8 100755 (executable)
--- a/t/t3203-branch-output.sh
+++ b/t/t3203-branch-output.sh
@@ -96,7 +96,7 @@ test_expect_success 'git branch -v pattern does not show branch summaries' '
 
 test_expect_success 'git branch shows detached HEAD properly' '
        cat >expect <<EOF &&
-* (detached from $(git rev-parse --short HEAD^0))
+* (HEAD detached at $(git rev-parse --short HEAD^0))
   branch-one
   branch-two
   master
@@ -106,4 +106,41 @@ EOF
        test_i18ncmp expect actual
 '
 
+test_expect_success 'git branch shows detached HEAD properly after moving' '
+       cat >expect <<EOF &&
+* (HEAD detached from $(git rev-parse --short HEAD))
+  branch-one
+  branch-two
+  master
+EOF
+       git reset --hard HEAD^1 &&
+       git branch >actual &&
+       test_i18ncmp expect actual
+'
+
+test_expect_success 'git branch shows detached HEAD properly from tag' '
+       cat >expect <<EOF &&
+* (HEAD detached at fromtag)
+  branch-one
+  branch-two
+  master
+EOF
+       git tag fromtag master &&
+       git checkout fromtag &&
+       git branch >actual &&
+       test_i18ncmp expect actual
+'
+
+test_expect_success 'git branch shows detached HEAD properly after moving from tag' '
+       cat >expect <<EOF &&
+* (HEAD detached from fromtag)
+  branch-one
+  branch-two
+  master
+EOF
+       git reset --hard HEAD^1 &&
+       git branch >actual &&
+       test_i18ncmp expect actual
+'
+
 test_done