try to unsubscribe from the log when the log view is destroyed, too

assets/scripts/app/views/log.coffee

@@ -1,6 +1,6 @@
 require 'log'
 
-Log.DEBUG = false
+Log.DEBUG = true
 
 Travis.reopen
   LogView: Travis.View.extend
@@ -8,6 +8,10 @@ Travis.reopen
     logBinding: 'job.log'
     contextBinding: 'job'
 
+    willDestroyElement: ->
+      job = @get('job')
+      job.unsubscribe() if job
+
     toTop: () ->
       $(window).scrollTop(0)