call site 1 for path.local.owner
path/local/testing/test_posix.py - line 173
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   def test_chown_dangling_link(self):
->     owner = self.root.owner()
       group = self.root.group()
       x = self.root.join('hello')
       x.mksymlinkto('qlwkejqwlek')
       try:
           self.root.chown(owner, group, rec=1)
       finally:
           x.remove(rec=0)