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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_tbapi9g1pl19u72729ece968kh, 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 />
svoid test_uniqCI() {
  // try old & new mode
  for (bool collectForwardRefs : ll(true, false)) {
    new Concepts cc;
    cc.collectForwardRefs = collectForwardRefs;
    Concept a = cnew(cc, Concept);
    Concept b = uniqCI(cc, Concept, myRef := a);
    assertSameVerbose(cc, a.concepts());
    assertSameVerbose(cc, b.concepts());
    assertEqualsVerbose(a, cget(b, "myRef"));
    assertEqualsVerbose(1, l(b._refs()));
    assertEqualsVerbose(1, l(a.backRefs));
    assertEquals(ll(b), findBackRefs(a));
  }
}