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-rw-r--r--fetch-pack.c1
-rwxr-xr-xt/t5500-fetch-pack.sh30
2 files changed, 31 insertions, 0 deletions
diff --git a/fetch-pack.c b/fetch-pack.c
index 3891f8bb86..10314df25b 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -1307,6 +1307,7 @@ static enum common_found process_acks(struct fetch_negotiator *negotiator,
if (skip_prefix(reader->line, "ACK ", &arg)) {
struct object_id oid;
+ received_ack = 1;
if (!get_oid_hex(arg, &oid)) {
struct commit *commit;
oidset_insert(common, &oid);
diff --git a/t/t5500-fetch-pack.sh b/t/t5500-fetch-pack.sh
index 95ed08db1b..fd39aad93f 100755
--- a/t/t5500-fetch-pack.sh
+++ b/t/t5500-fetch-pack.sh
@@ -403,6 +403,36 @@ test_expect_success 'in_vain not triggered before first ACK' '
test_i18ngrep "Total 3 " trace
'
+test_expect_success 'in_vain resetted upon ACK' '
+ rm -rf myserver myclient trace &&
+ git init myserver &&
+
+ # Linked list of commits on master. The first is common; the rest are
+ # not.
+ test_commit -C myserver first_master_commit &&
+ git clone "file://$(pwd)/myserver" myclient &&
+ test_commit_bulk -C myclient 255 &&
+
+ # Another linked list of commits on anotherbranch with no connection to
+ # master. The first is common; the rest are not.
+ git -C myserver checkout --orphan anotherbranch &&
+ test_commit -C myserver first_anotherbranch_commit &&
+ git -C myclient fetch origin anotherbranch:refs/heads/anotherbranch &&
+ git -C myclient checkout anotherbranch &&
+ test_commit_bulk -C myclient 255 &&
+
+ # The new commit that the client wants to fetch.
+ git -C myserver checkout master &&
+ test_commit -C myserver to_fetch &&
+
+ # The client will send (as "have"s) all 256 commits in anotherbranch
+ # first. The 256th commit is common between the client and the server,
+ # and should reset in_vain. This allows negotiation to continue until
+ # the client reports that first_anotherbranch_commit is common.
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C myclient fetch --progress origin master &&
+ test_i18ngrep "Total 3 " trace
+'
+
test_expect_success 'fetch in shallow repo unreachable shallow objects' '
(
git clone --bare --branch B --single-branch "file://$(pwd)/." no-reflog &&