Trigger a notification when there is a keymap issue

package.json

@@ -20,7 +20,7 @@
   "atomShellVersion": "0.19.4",
   "dependencies": {
     "async": "0.2.6",
-    "atom-keymap": "^2.2.2",
+    "atom-keymap": "^2.3.0",
     "bootstrap": "git+https://github.com/atom/bootstrap.git#6af81906189f1747fd6c93479e3d998ebe041372",
     "clear-cut": "0.4.0",
     "coffee-script": "1.7.0",

src/atom.coffee

@@ -249,6 +249,7 @@ class Atom extends Model
     @config = new Config({configDirPath, resourcePath})
     @keymaps = new KeymapManager({configDirPath, resourcePath})
     @keymap = @keymaps # Deprecated
+    @keymaps.subscribeToFileReadFailure()
     @tooltips = new TooltipManager
     @notifications = new NotificationManager
     @commands = new CommandRegistry

src/keymap-extensions.coffee

@@ -23,6 +23,10 @@ KeymapManager::loadUserKeymap = ->
   if fs.isFileSync(userKeymapPath)
     @loadKeymap(userKeymapPath, watch: true, suppressErrors: true)
 
+KeymapManager::subscribeToFileReadFailure = ->
+  this.onDidFailToReadFile (error) ->
+    atom.notifications.addError('Failed to load keymap.cson', {detail: error.stack, closable: true})
+
 # This enables command handlers registered via jQuery to call
 # `.abortKeyBinding()` on the `jQuery.Event` object passed to the handler.
 jQuery.Event::abortKeyBinding = ->