Re: [PATCH 16/22] builtin/repack: fix leaking line buffer when packing promisors

In `repack_promisor_objects()` we read output from git-pack-objects(1)
line by line, using `strbuf_getline_lf()`. We never free the line
buffer, causing a memory leak. Plug it.

This leak is being hit in t5616, but plugging it alone is not
sufficient to make the whole test suite leak free.

Signed-off-by: Patrick Steinhardt <redacted>
---
 builtin/repack.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/builtin/repack.c b/builtin/repack.c
index 8bb875532b4..a382754feee 100644
--- a/builtin/repack.c
+++ b/builtin/repack.c

@@ -425,9 +425,11 @@ static void repack_promisor_objects(const struct pack_objects_args *args,
 
 		free(promisor_name);
 	}
+
 	fclose(out);
 	if (finish_command(&cmd))
 		die(_("could not finish pack-objects to repack promisor objects"));
+	strbuf_release(&line);
 }