From 24bcb507ecf9b656fb9d5532dab9d1cac9c84a33 Mon Sep 17 00:00:00 2001 From: Ryan Dwyer Date: Sun, 30 Sep 2018 11:58:56 +1000 Subject: [PATCH] Fix hotplugging down to zero outputs When the last output is disconnected, output_disable is called like usual and evacuates the output to the root->saved_workspaces list. It then calls root_for_each_container to remove (untrack) the output from each container's outputs list. However root_for_each_container did not iterate the saved workspaces, so when the output gets freed the containers would have a dangling pointer in their outputs list. Upon reconnect, container_discover_outputs would attempt to use the dangling pointer, causing a crash. This makes root_for_each_container check the saved workspaces list, which fixes the problem. --- sway/tree/root.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/sway/tree/root.c b/sway/tree/root.c index d6f67bd76..6748e9c96 100644 --- a/sway/tree/root.c +++ b/sway/tree/root.c @@ -273,6 +273,12 @@ void root_for_each_container(void (*f)(struct sway_container *con, void *data), container_for_each_child(container, f, data); } } + + // Saved workspaces + for (int i = 0; i < root->saved_workspaces->length; ++i) { + struct sway_workspace *ws = root->saved_workspaces->items[i]; + workspace_for_each_container(ws, f, data); + } } struct sway_output *root_find_output( @@ -320,6 +326,15 @@ struct sway_container *root_find_container( } } } + + // Saved workspaces + for (int i = 0; i < root->saved_workspaces->length; ++i) { + struct sway_workspace *ws = root->saved_workspaces->items[i]; + if ((result = workspace_find_container(ws, test, data))) { + return result; + } + } + return NULL; }