Merge pull request #2451 from RyanDwyer/fix-ancestor-crash

Fix container_has_ancestor crash

1 files changed, 1 insertions, 1 deletions

diff --git a/sway/tree/container.c b/sway/tree/container.c
index 435d71e2..45e54080 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -769,7 +769,7 @@ void container_for_each_descendant(struct sway_container *container,
 
 bool container_has_ancestor(struct sway_container *descendant,
                 struct sway_container *ancestor) {
-        while (descendant->type != C_ROOT) {
+        while (descendant && descendant->type != C_ROOT) {
                 descendant = descendant->parent;
                 if (descendant == ancestor) {
                         return true;