[PATCH 4/4] SANITIZE tests: fix leak in mailmap.c

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Get closer to being able to run t4203-mailmap.sh by fixing a couple of
memory leak in mailmap.c.

In the free_mailmap_entry() code added in 0925ce4d49 (Add map_user()
and clear_mailmap() to mailmap, 2009-02-08) the intent was clearly to
clear the "me" structure, but while we freed parts of the
mailmap_entry structure, we didn't free the structure itself. The same
goes for the "mailmap_info" structure.
---
 mailmap.c          | 2 ++
 t/t4203-mailmap.sh | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/mailmap.c b/mailmap.c
index d1f7c0d272..e1c8736093 100644
--- a/mailmap.c
+++ b/mailmap.c
@@ -36,6 +36,7 @@ static void free_mailmap_info(void *p, const char *s)
 		 s, debug_str(mi->name), debug_str(mi->email));
 	free(mi->name);
 	free(mi->email);
+	free(mi);
 }
 
 static void free_mailmap_entry(void *p, const char *s)
@@ -51,6 +52,7 @@ static void free_mailmap_entry(void *p, const char *s)
 
 	me->namemap.strdup_strings = 1;
 	string_list_clear_func(&me->namemap, free_mailmap_info);
+	free(me);
 }
 
 /*
diff --git a/t/t4203-mailmap.sh b/t/t4203-mailmap.sh
index 0b2d21ec55..c7de4299cf 100755
--- a/t/t4203-mailmap.sh
+++ b/t/t4203-mailmap.sh
@@ -79,6 +79,12 @@ test_expect_success 'check-mailmap bogus contact --stdin' '
 	test_must_fail git check-mailmap --stdin bogus </dev/null
 '
 
+if test_have_prereq SANITIZE_LEAK
+then
+	skip_all='skipping the rest of mailmap tests under SANITIZE_LEAK'
+	test_done
+fi
+
 test_expect_success 'No mailmap' '
 	cat >expect <<-EOF &&
 	$GIT_AUTHOR_NAME (1):
-- 
2.32.0-dev