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-rw-r--r--cmd-rename-session.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/cmd-rename-session.c b/cmd-rename-session.c
index 51b8ffc8..49fafe33 100644
--- a/cmd-rename-session.c
+++ b/cmd-rename-session.c
@@ -53,6 +53,11 @@ cmd_rename_session_exec(struct cmd *self, struct cmdq_item *item)
tmp = format_single_from_target(item, args->argv[0]);
newname = session_check_name(tmp);
+ if (newname == NULL) {
+ cmdq_error(item, "invalid session: %s", tmp);
+ free(tmp);
+ return (CMD_RETURN_ERROR);
+ }
free(tmp);
if (strcmp(newname, s->name) == 0) {
free(newname);