title: Django collectstatic no such file or directory
body: <p>In django 1.7 collectstatic throws an exception for me:</p>
  
  <pre><code>OSError: [Errno 2] No such file or directory: '/static'
  </code></pre>
  
  <p>I've performed a lot of <code>collectstatic</code>-calls and everything worked fine, but today have this issue.</p>
  
  <p>settings.py</p>
  
  <pre><code>BASE_DIR = os.path.dirname(os.path.realpath(__file__))
  INSTALLED_APPS = (
      'django.contrib.admin',
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
  
      'fxblog',
      'rest_framework',
  )
  
  STATIC_URL = '/static/'
  STATIC_ROOT = os.path.join(BASE_DIR, STATIC_URL.strip("/"))
  
  STATICFILES_DIRS = (
      '/static/',
      '/upload/',
  )
  </code></pre>
  
  <p>BASE_DIR is correct, checked it. Directory BASE_DIR/static/ exists and all my static files are there.</p>
  
  <p>Traceback:</p>
  
  <pre><code>Traceback (most recent call last):
    File "../manage.py", line 10, in &lt;module&gt;
      execute_from_command_line(sys.argv)
    File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
      utility.execute()
    File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 392, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 242, in run_from_argv
      self.execute(*args, **options.__dict__)
    File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
      output = self.handle(*args, **options)
    File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 415, in handle
      return self.handle_noargs(**options)
    File "/usr/local/lib/python2.7/dist-packages/django/contrib/staticfiles/management/commands/collectstatic.py", line 173, in handle_noargs
      collected = self.collect()
    File "/usr/local/lib/python2.7/dist-packages/django/contrib/staticfiles/management/commands/collectstatic.py", line 103, in collect
      for path, storage in finder.list(self.ignore_patterns):
    File "/usr/local/lib/python2.7/dist-packages/django/contrib/staticfiles/finders.py", line 106, in list
      for path in utils.get_files(storage, ignore_patterns):
    File "/usr/local/lib/python2.7/dist-packages/django/contrib/staticfiles/utils.py", line 25, in get_files
      directories, files = storage.listdir(location)
    File "/usr/local/lib/python2.7/dist-packages/django/core/files/storage.py", line 249, in listdir
      for entry in os.listdir(path):
  OSError: [Errno 2] No such file or directory: '/static'
  </code></pre>
  
  <p>Any suggestions?</p>