[gnome-shell/gnome-3-28] network: Don't assume the active connection has been processed first

[Florian Müllner <fmuellner src gnome org>]

commit 7dbcd2661966846ea9caa669fb856faadac5bac5
Author: Iain Lane <iainl gnome org>
Date:   Thu Aug 16 10:59:36 2018 +0000

    network: Don't assume the active connection has been processed first
    
    `NMConnectionDevice._sync()` is responsible for setting up the active
    connection that we'll end up displaying. It expects the active
    connection to already be in a map `_connectionItems`. If it isn't in
    there, we get a null dereference and the indicator can get into a weird
    state where it doesn't display devices / connections properly.
    
    Let's change this expectation. If there is an active connection,
    `_deviceAdded()` will eventually get to it and call `_sync()` to set up
    the active connection state. We make `_sync()` tolerate there being no
    active connection when it's called.
    
    Closes: https://gitlab.gnome.org/GNOME/gnome-shell/issues/140
    
    
    (cherry picked from commit 5d61e2563d183272f604f1a2af635ad5cbdb627e)

 js/ui/status/network.js | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)
---
diff --git a/js/ui/status/network.js b/js/ui/status/network.js
index a75993612..79acef264 100644
--- a/js/ui/status/network.js
+++ b/js/ui/status/network.js
@@ -419,12 +419,14 @@ var NMConnectionDevice = new Lang.Class({
         this._deactivateItem.actor.visible = this._device.state > NM.DeviceState.DISCONNECTED;
 
         if (this._activeConnection == null) {
-            this._activeConnection = this._device.active_connection;
-
-            if (this._activeConnection) {
-                ensureActiveConnectionProps(this._activeConnection, this._client);
-                let item = this._connectionItems.get(this._activeConnection.connection.get_uuid());
-                item.setActiveConnection(this._activeConnection);
+            let activeConnection = this._device.active_connection;
+            if (activeConnection && activeConnection.connection) {
+                let item = this._connectionItems.get(activeConnection.connection.get_uuid());
+                if (item) {
+                    this._activeConnection = activeConnection;
+                    ensureActiveConnectionProps(this._activeConnection, this._client);
+                    item.setActiveConnection(this._activeConnection);
+                }
             }
         }