Change copying arguments to that flags without arguments are inserted

correctly and empty arguments lists do not crash. Fixes crash reported
by & ok mpi@.

1 files changed, 7 insertions, 2 deletions

diff --git a/arguments.c b/arguments.c
index d7274ff8..20d5e7ba 100644
--- a/arguments.c
+++ b/arguments.c
@@ -302,10 +302,13 @@ args_copy(struct args *args, int argc, char **argv)
 	struct args_value	*value, *new_value;
 	u_int			 i;
 
+	cmd_log_argv(argc, argv, "%s", __func__);
+
 	new_args = args_create();
 	RB_FOREACH(entry, args_tree, &args->tree) {
-		if (entry->count == 1) {
-			args_set(new_args, entry->flag, NULL);
+		if (TAILQ_EMPTY(&entry->values)) {
+			for (i = 0; i < entry->count; i++)
+				args_set(new_args, entry->flag, NULL);
 			continue;
 		}
 		TAILQ_FOREACH(value, &entry->values, entry) {
@@ -314,6 +317,8 @@ args_copy(struct args *args, int argc, char **argv)
 			args_set(new_args, entry->flag, new_value);
 		}
 	}
+	if (args->count == 0)
+		return (new_args);
 	new_args->count = args->count;
 	new_args->values = xcalloc(args->count, sizeof *new_args->values);
 	for (i = 0; i < args->count; i++) {