container: Fix NULL pointer dereference
Reset the workspace layout to the output's default only if the workspace
is actually attached to an output.
Fixes
@@ -1358,7 +1358,9 @@ void container_detach(struct sway_container *child) {
// We may have removed the last tiling child from the workspace. If the
// workspace layout was e.g. tabbed, then at this point it may be just
// H[]. So, reset it to the default (e.g. T[]) for next time.
- if (!old_workspace->tiling->length) {
+ // But if we are evacuating a workspace with only sticky floating
+ // containers, the workspace will already be detached from the output.
+ if (old_workspace->output && !old_workspace->tiling->length) {
old_workspace->layout =
output_get_default_layout(old_workspace->output);
}
