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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_uokdk2r5juingt4affr48oq8tm, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
sclass OrError<A> extends Var<A> {
  O error; // usually a Throwable
  
  *() {}
  *(A value) { super(value); }
  *(bool dummy, O *error) { assertNotNull(error); }
  
  bool ok() { ret error == null; }
  O error() { ret error; }
  
  static <B> OrError<B> ok(B a) { ret new OrError(a); }
  static OrError error(O error) { ret new OrError(true, error); }
  
  toString {
    ret ok()
      ? super.toString()
      : str(error);
  }
}