anchor.diff:            fail("shoud fail");
           } on FileSystemException catch (e) {
             _printErr(e);
  +          // mac
  +          expect(e.status, FileSystemException.statusNotFound);
             // <22> not parsed invalid argument FileSystemException: Cannot rename link to '/media/ssd/devx/git/github.com/tekartik/fs_shim.dart/test_out/io/link/rename_notfound/link2', path = '/media/ssd/devx/git/github.com/tekartik/fs_shim.dart/test_out/io/link/rename_notfound/link' (OS Error: Invalid argument, errno = 22) [FileSystemExceptionImpl]
           }
         });
  
positive.code:           fail("should fail");
          } on FileSystemException catch (e) {
            _printErr(e);
            // idb: err 17
            // expect(e.status, FileSystemException.statusNotFound);
          }
  
          expect(await fs.isLink(link.path), isTrue);
  
negative.code:             expect(e.status, FileSystemException.statusAccessError);
            } else {
              // Invalid argument for links
              // idb?linux?
  
              // mac
              expect(e.status, FileSystemException.statusIsADirectory);
            }
          }
  
  