[PATCH 6/6] t5608: add regression test for >4GB object clone

From

Johannes Schindelin via GitGitGadget <gitgitgadget@gmail.com>

Date

Apr 28, 2026, 16:26 UTC

Message-ID

<a3019888d8465e0f77926a91a20db170fef6989d.1777393580.git.gitgitgadget@gmail.com>

In-Reply-To

<pull.2102.git.1777393580.gitgitgadget@gmail.com>

From: Johannes Schindelin <johannes.schindelin@gmx.de>

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 t/t5608-clone-2gb.sh | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/t/t5608-clone-2gb.sh b/t/t5608-clone-2gb.sh
index 87a8cd9f98..af93302dde 100755
--- a/t/t5608-clone-2gb.sh
+++ b/t/t5608-clone-2gb.sh
@@ -49,4 +49,41 @@ test_expect_success 'clone - with worktree, file:// protocol' '
 
 '
 
+test_expect_success SIZE_T_IS_64BIT 'set up repo with >4GB object' '
+	large_blob_size=$((4*1024*1024*1024+1)) &&
+	git init --bare 4gb-repo &&
+	head_oid=$(test-tool synthesize pack \
+		--reachable-large "$large_blob_size" \
+		4gb-repo/objects/pack/test.pack) &&
+	git -C 4gb-repo index-pack objects/pack/test.pack &&
+	git -C 4gb-repo update-ref refs/heads/main $head_oid &&
+	git -C 4gb-repo symbolic-ref HEAD refs/heads/main
+'
+
+test_expect_success SIZE_T_IS_64BIT 'clone >4GB object via unpack-objects' '
+	# The synthesized pack has five objects, so a large unpack limit keeps
+	# fetch-pack on the unpack-objects path.
+	git -c fetch.unpackLimit=100 clone --bare \
+		"file://$(pwd)/4gb-repo" 4gb-clone-unpack &&
+
+	# Verify the large blob survived the clone by comparing its OID
+	# between source and clone.  We cannot use "cat-file -s" because
+	# object_info.sizep is still unsigned long, which truncates >4GB
+	# sizes on Windows.  OID equality proves content integrity since
+	# the clone already verified checksums via index-pack/unpack-objects.
+	source_blob=$(git -C 4gb-repo rev-parse main^:file) &&
+	clone_blob=$(git -C 4gb-clone-unpack rev-parse main^:file) &&
+	test "$source_blob" = "$clone_blob"
+'
+
+test_expect_success SIZE_T_IS_64BIT 'clone with >4GB object via index-pack' '
+	# Force fetch-pack to hand the pack to index-pack instead.
+	git -c fetch.unpackLimit=1 clone --bare \
+		"file://$(pwd)/4gb-repo" 4gb-clone-index &&
+
+	source_blob=$(git -C 4gb-repo rev-parse main^:file) &&
+	clone_blob=$(git -C 4gb-clone-index rev-parse main^:file) &&
+	test "$source_blob" = "$clone_blob"
+'
+
 test_done

-- 
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