Fix crash in swap command

When swapping containers that are in the root of the workspace, parent
will be NULL.

1 files changed, 13 insertions, 2 deletions

diff --git a/sway/commands/swap.c b/sway/commands/swap.c
index e7f9cbea..d8ffe78c 100644
--- a/sway/commands/swap.c
+++ b/sway/commands/swap.c
@@ -22,6 +22,7 @@ static void swap_places(struct sway_container *con1,
         temp->width = con1->width;
         temp->height = con1->height;
         temp->parent = con1->parent;
+        temp->workspace = con1->workspace;
 
         con1->x = con2->x;
         con1->y = con2->y;
@@ -34,8 +35,18 @@ static void swap_places(struct sway_container *con1,
         con2->height = temp->height;
 
         int temp_index = container_sibling_index(con1);
-        container_insert_child(con2->parent, con1, container_sibling_index(con2));
-        container_insert_child(temp->parent, con2, temp_index);
+        if (con2->parent) {
+                container_insert_child(con2->parent, con1,
+                                container_sibling_index(con2));
+        } else {
+                workspace_insert_tiling(con2->workspace, con1,
+                                container_sibling_index(con2));
+        }
+        if (temp->parent) {
+                container_insert_child(temp->parent, con2, temp_index);
+        } else {
+                workspace_insert_tiling(temp->workspace, con2, temp_index);
+        }
 
         free(temp);
 }