In 98e7ab6d42 (for-each-ref: delay parsing of --sort=<atom> options,
2021-10-20) a new string_list was introduced to accumulate any
"branch.sort" setting.

That string_list is cleared in ref_sorting_options(), which is only
called when processing the "--list" sub-command.  Therefore, with other
sub-command, while having any sort option set, a leak is produced, e.g.:

   $ git config branch.sort invalid_sort_option
   $ git branch --edit-description

   Direct leak of 384 byte(s) in 1 object(s) allocated from:
       ... in xrealloc wrapper.c
       ... in string_list_append_nodup string-list.c
       ... in string_list_append string-list.c
       ... in git_branch_config builtin/branch.c
       ... in configset_iter config.c
       ... in repo_config config.c
       ... in git_config config.c
       ... in cmd_branch builtin/branch.c
       ... in run_builtin git.c

   Indirect leak of 20 byte(s) in 1 object(s) allocated from:
       ... in xstrdup wrapper.c
       ... in string_list_append string-list.c
       ... in git_branch_config builtin/branch.c
       ... in configset_iter config.c
       ... in repo_config config.c
       ... in git_config config.c
       ... in cmd_branch builtin/branch.c
       ... in run_builtin git.c

We don't have a common clean-up section in cmd_branch().  To avoid
refactoring and keep the fix simple, and while we find a better
solution, let's silence the leak-hunter making the list static.

Signed-off-by: Rubén Justo <redacted>
---
 builtin/branch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/branch.c b/builtin/branch.c
index e6c2655af6..759480fe8d 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c

@@ -709,7 +709,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 	enum branch_track track;
 	struct ref_filter filter;
 	static struct ref_sorting *sorting;
-	struct string_list sorting_options = STRING_LIST_INIT_DUP;
+	static struct string_list sorting_options = STRING_LIST_INIT_DUP;
 	struct ref_format format = REF_FORMAT_INIT;
 
 	struct option options[] = {

-- 
2.40.1