git/t/t5536-fetch-conflicts.sh
Patrick Steinhardt 8960819e73 remote: fix leaking peer ref when expanding refmap
When expanding remote refs via the refspec in `get_expanded_map()`, we
first copy the remote ref and then override its peer ref with the
expanded name. This may cause a memory leak though in case the peer ref
is already set, as this field is being copied by `copy_ref()`, as well.

Fix the leak by freeing the peer ref before we re-assign the field.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-22 09:18:06 -07:00

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#!/bin/sh
test_description='fetch handles conflicting refspecs correctly'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
D=$(pwd)
setup_repository () {
git init "$1" && (
cd "$1" &&
git config remote.origin.url "$D" &&
shift &&
for refspec in "$@"
do
git config --add remote.origin.fetch "$refspec"
done
)
}
test_expect_success 'setup' '
git commit --allow-empty -m "Initial" &&
git branch branch1 &&
git tag tag1 &&
git commit --allow-empty -m "First" &&
git branch branch2 &&
git tag tag2
'
test_expect_success 'fetch with no conflict' '
setup_repository ok "+refs/heads/*:refs/remotes/origin/*" && (
cd ok &&
git fetch origin
)
'
test_expect_success 'fetch conflict: config vs. config' '
setup_repository ccc \
"+refs/heads/branch1:refs/remotes/origin/branch1" \
"+refs/heads/branch2:refs/remotes/origin/branch1" && (
cd ccc &&
test_must_fail git fetch origin 2>error &&
test_grep "fatal: Cannot fetch both refs/heads/branch1 and refs/heads/branch2 to refs/remotes/origin/branch1" error
)
'
test_expect_success 'fetch duplicate: config vs. config' '
setup_repository dcc \
"+refs/heads/*:refs/remotes/origin/*" \
"+refs/heads/branch1:refs/remotes/origin/branch1" && (
cd dcc &&
git fetch origin
)
'
test_expect_success 'fetch conflict: arg overrides config' '
setup_repository aoc \
"+refs/heads/*:refs/remotes/origin/*" && (
cd aoc &&
git fetch origin refs/heads/branch2:refs/remotes/origin/branch1
)
'
test_expect_success 'fetch conflict: arg vs. arg' '
setup_repository caa && (
cd caa &&
test_must_fail git fetch origin \
refs/heads/*:refs/remotes/origin/* \
refs/heads/branch2:refs/remotes/origin/branch1 2>error &&
test_grep "fatal: Cannot fetch both refs/heads/branch1 and refs/heads/branch2 to refs/remotes/origin/branch1" error
)
'
test_expect_success 'fetch conflict: criss-cross args' '
setup_repository xaa \
"+refs/heads/*:refs/remotes/origin/*" && (
cd xaa &&
git fetch origin \
refs/heads/branch1:refs/remotes/origin/branch2 \
refs/heads/branch2:refs/remotes/origin/branch1 2>error &&
test_grep "warning: refs/remotes/origin/branch1 usually tracks refs/heads/branch1, not refs/heads/branch2" error &&
test_grep "warning: refs/remotes/origin/branch2 usually tracks refs/heads/branch2, not refs/heads/branch1" error
)
'
test_done