CiviVolunteer does not honor $civicrm_setting['Directory Preferences']['extensionsDir']

Setup

1. In civicrm.settings.php, set

   $civicrm_setting['Directory Preferences']['extensionsDir']

   to the correct directory.

2. Set System Settings | Resource URLs | Extension Resource URL to a non-existent directory.

Result

Hard to describe, because the results were inconsistent. I have observed:

1. Clicking Volunteer | Manage Volunteer Projects may:
   • Return a mostly empty white screen.
   • Go to the Civi home page
   • Work as expected.
2. On an Event management page, clicking the Volunteer tab may:
   • Produce 4 buttons that do nothing.
   • Produce gibberish on the screen.
   • Work as expected.
3. The following Angular error was noted:

   Error: $injector:modulerr
   Module Error
   
   Failed to instantiate module crmApp due to:
   [$injector:nomod] http://errors.angularjs.org/1.3.20/$injector/nomod?p0=crmApp
   S/<@http://my_site.com/drupal/sites/all/modules/civicrm/b... line 2 > eval:6:417
   Od/</</<@http://my_site.com/drupal/sites/all/modules/civicrm/b... line 2 > eval:21:412
   a@http://my_site.com/drupal/sites/all/modules/civicrm... line 2 > eval:21:53
   Od/</<@http://my_site.com/drupal/sites/all/modules/civicrm/b... line 2 > eval:21:296
   g/<@http://my_site.com/drupal/sites/all/modules/civicrm/b... line 2 > eval:35:46
   r@http://my_site.com/drupal/sites/all/modules/civicrm... line 2 > eval:7:320
   g@http://my_site.com/drupal/sites/all/modules/civicrm... line 2 > eval:34:399
   cb@http://my_site.com/drupal/sites/all/modules/civicr... line 2 > eval:38:135
   tc/d@http://my_site.com/drupal/sites/all/modules/civicrm... line 2 > eval:17:381
   tc@http://my_site.com/drupal/sites/all/modules/civicr... line 2 > eval:18:179
   Jd@http://my_site.com/drupal/sites/all/modules/civicr... line 2 > eval:17:1
   @http://my_site.com/drupal/sites/all/modules/civicrm/b... line 2 > eval:252:171
   m.Callbacks/j@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:2:27304
   m.Callbacks/k.add@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:2:27618
   m.fn.ready@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:2:29706
   @http://my_site.com/drupal/sites/all/modules/civicrm/b... line 2 > eval:252:149
   @http://my_site.com/drupal/sites/all/modules/civicrm/b... line 2 > eval:6:2
   .globalEval/<@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:2:2615
   .globalEval@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:2:2589
   .converters["text script"]@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:5:26518
   Pb@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:5:18363
   x@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:5:21793
   .send/b@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:5:26030
   .send@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:5:26134
   .ajax@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:5:21568
   m._evalUrl@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:5:22647
   .domManip@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:4:23087
   .append@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:4:20615
   .html/<@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:4:22138
   m.access@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:4:3397
   .html@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:4:21736
   .refresh/<@http://my_site.com/drupal/sites/all/modules/civicrm/js/crm.ajax.js?r=gtmky:259:9
   m.Callbacks/j@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:2:27304
   m.Callbacks/k.fireWith@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:2:28122
   x@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:5:22109
   .send/b@http://my_site.com/drupal/sites/all/modules/civicrm/bower_components/jquery/dist/jquery.min.js?r=gtmky:5:26030
   http://my_site.com/drupal/sites/all/modules/civicrm/b...
   

After setting System Settings | Resource URLs | Extension Resource URL to the same value as specified in civicrm.settings.php, everything worked as expected.