From 48c4985e341d05590a6504abab258b732e2c4b64 Mon Sep 17 00:00:00 2001
From: Yuya Nishihara <yuya@tcha.org>
Date: Sat, 13 Jan 2024 13:19:24 +0900
Subject: [PATCH] git_backend: ensure that no-gc ref target never conflicts

---
 lib/src/git_backend.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/src/git_backend.rs b/lib/src/git_backend.rs
index ab67e8aec..4da11d515 100644
--- a/lib/src/git_backend.rs
+++ b/lib/src/git_backend.rs
@@ -594,7 +594,7 @@ fn prevent_gc(git_repo: &gix::Repository, id: &CommitId) -> Result<(), BackendEr
 fn to_no_gc_ref_update(id: &CommitId) -> gix::refs::transaction::RefEdit {
     let name = format!("{NO_GC_REF_NAMESPACE}{}", id.hex());
     let new = gix::refs::Target::Peeled(validate_git_object_id(id).unwrap());
-    let expected = gix::refs::transaction::PreviousValue::Any;
+    let expected = gix::refs::transaction::PreviousValue::ExistingMustMatch(new.clone());
     gix::refs::transaction::RefEdit {
         change: gix::refs::transaction::Change::Update {
             log: gix::refs::transaction::LogChange {