From: Derrick Stolee <dstolee@xxxxxxxxxxxxx> Add a test to t1091-sparse-checkout-builtin.sh that would result in an infinite loop and out-of-memory error before this change. The issue relies on having non-cone-mode patterns while trying to modify the patterns in cone-mode. The fix is simple, allowing us to break from the loop when the input path does not contain a slash, as the "dir" pattern we added does not. This is only a fix to the critical out-of-memory error. A better response to such a strange state will follow in a later change. Reported-by: Calbabreaker <calbabreaker@xxxxxxxxx> Helped-by: Taylor Blau <me@xxxxxxxxxxxx> Signed-off-by: Derrick Stolee <dstolee@xxxxxxxxxxxxx> --- builtin/sparse-checkout.c | 2 +- t/t1091-sparse-checkout-builtin.sh | 8 ++++++++ 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c index 8ba9f13787b..b45fd97a98b 100644 --- a/builtin/sparse-checkout.c +++ b/builtin/sparse-checkout.c @@ -389,7 +389,7 @@ static void insert_recursive_pattern(struct pattern_list *pl, struct strbuf *pat char *oldpattern = e->pattern; size_t newlen; - if (slash == e->pattern) + if (!slash || slash == e->pattern) break; newlen = slash - e->pattern; diff --git a/t/t1091-sparse-checkout-builtin.sh b/t/t1091-sparse-checkout-builtin.sh index 38fc8340f5c..a429d2cc671 100755 --- a/t/t1091-sparse-checkout-builtin.sh +++ b/t/t1091-sparse-checkout-builtin.sh @@ -103,6 +103,14 @@ test_expect_success 'clone --sparse' ' check_files clone a ' +test_expect_success 'switching to cone mode with non-cone mode patterns' ' + git init bad-patterns && + git -C bad-patterns sparse-checkout init && + git -C bad-patterns sparse-checkout add dir && + git -C bad-patterns config core.sparseCheckoutCone true && + git -C bad-patterns sparse-checkout add dir +' + test_expect_success 'interaction with clone --no-checkout (unborn index)' ' git clone --no-checkout "file://$(pwd)/repo" clone_no_checkout && git -C clone_no_checkout sparse-checkout init --cone && -- gitgitgadget
