Fix dangling pointer on focus swap/describe WS

1 files changed, 5 insertions, 1 deletions

diff --git a/sway/ipc-server.c b/sway/ipc-server.c
index 7c737307..3f02812d 100644
--- a/sway/ipc-server.c
+++ b/sway/ipc-server.c
@@ -455,7 +455,11 @@ void ipc_get_outputs_callback(swayc_t *container, void *data) {
 void ipc_event_workspace(swayc_t *old, swayc_t *new) {
         json_object *obj = json_object_new_object();
         json_object_object_add(obj, "change", json_object_new_string("focus"));
-        json_object_object_add(obj, "old", ipc_json_describe_workspace(old));
+        if (old) {
+                json_object_object_add(obj, "old", ipc_json_describe_workspace(old));
+        } else {
+                json_object_object_add(obj, "old", NULL);
+        }
         json_object_object_add(obj, "current", ipc_json_describe_workspace(new));
         const char *json_string = json_object_to_json_string(obj);