[PATCH v4 1/8] leak tests: fix a memory leaks in "test-progress" helper

Fix a memory leak in the test-progress helper, and mark the
corresponding "t0500-progress-display.sh" test as being leak-free
under SANITIZE=leak. This fixes a leak added in 2bb74b53a4 (Test the
progress display, 2019-09-16).

My 48f68715b14 (tr2: stop leaking "thread_name" memory, 2021-08-27)
had fixed another memory leak in this test (as it did some trace2
testing).

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
 t/helper/test-progress.c    | 1 +
 t/t0500-progress-display.sh | 1 +
 2 files changed, 2 insertions(+)

diff --git a/t/helper/test-progress.c b/t/helper/test-progress.c
index 5d05cbe7894..9265e6ab7cf 100644
--- a/t/helper/test-progress.c
+++ b/t/helper/test-progress.c

@@ -69,6 +69,7 @@ int cmd__progress(int argc, const char **argv)
 			die("invalid input: '%s'\n", line.buf);
 	}
 	stop_progress(&progress);
+	strbuf_release(&line);
 
 	return 0;
 }

diff --git a/t/t0500-progress-display.sh b/t/t0500-progress-display.sh
index 22058b503ac..f37cf2eb9c9 100755
--- a/t/t0500-progress-display.sh
+++ b/t/t0500-progress-display.sh

@@ -2,6 +2,7 @@
 
 test_description='progress display'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 show_cr () {

-- 
2.33.1.1510.ge5c82eefb93