Use a release_revisions() with those "struct rev_list" users which
already "UNLEAK" the struct. It may seem odd to simultaneously attempt
to free() memory, but also to explicitly ignore whether we have memory
leaks in the same.

As explained in preceding commits this is being done to use the
built-in commands as a guinea pig for whether the release_revisions()
function works as expected, we'd like to test e.g. whether we segfault
as we change it. In subsequent commits we'll then remove these
UNLEAK() as the function is made to free the memory that caused us to
add them in the first place.

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
 builtin/diff-index.c | 4 +++-
 builtin/diff.c       | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/builtin/diff-index.c b/builtin/diff-index.c
index 5fd23ab5b6c..3a83183c312 100644
--- a/builtin/diff-index.c
+++ b/builtin/diff-index.c

@@ -71,5 +71,7 @@ int cmd_diff_index(int argc, const char **argv, const char *prefix)
 	}
 	result = run_diff_index(&rev, option);
 	UNLEAK(rev);
-	return diff_result_code(&rev.diffopt, result);
+	result = diff_result_code(&rev.diffopt, result);
+	release_revisions(&rev);
+	return result;
 }

diff --git a/builtin/diff.c b/builtin/diff.c
index bb7fafca618..dd48336da56 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c

@@ -595,6 +595,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 	if (1 < rev.diffopt.skip_stat_unmatch)
 		refresh_index_quietly();
 	UNLEAK(rev);
+	release_revisions(&rev);
 	UNLEAK(ent);
 	UNLEAK(blob);
 	return result;

-- 
2.35.1.1557.g4e3e9cdb5e0