Program: 160051
Project: 160051
Buggy source:
private static void traceCombat(Game game,Permanent attacker,Permanent blocker){
  String uuid="String_Node_Str" + UUID.randomUUID() + "String_Node_Str";
  log.error(uuid + "String_Node_Str");
  log.error(uuid + blocker.getName() + "String_Node_Str"+ attacker.getName());
  log.error(uuid);
  log.error(uuid + "String_Node_Str");
  for (  Ability ability : attacker.getAbilities()) {
    log.error(uuid + "String_Node_Str" + ability.toString()+ "String_Node_Str"+ ability.getId());
  }
  log.error(uuid + "String_Node_Str");
  for (  Ability ability : blocker.getAbilities()) {
    log.error(uuid + "String_Node_Str" + ability.toString()+ "String_Node_Str"+ ability.getId());
  }
  log.error(uuid);
  log.error(uuid + "String_Node_Str" + FlyingAbility.getInstance().getId());
  log.error(uuid + "String_Node_Str" + ReachAbility.getInstance().getId());
  log.error(uuid);
  log.error(uuid + "String_Node_Str");
  Ability ability=attacker.getAbilities().size() > 0 ? attacker.getAbilities().get(0) : null;
  ContinuousEffectsList<RestrictionEffect> restrictionEffects=(ContinuousEffectsList<RestrictionEffect>)game.getContinuousEffects().getRestrictionEffects();
  for (  RestrictionEffect effect : restrictionEffects) {
    log.error(uuid + "String_Node_Str" + effect);
    log.error(uuid + "String_Node_Str" + effect.getId());
    log.error(uuid + "String_Node_Str" + effect.applies(attacker,ability,game));
    log.error(uuid + "String_Node_Str" + effect.applies(blocker,ability,game));
  }
  for (  RestrictionEffect effect : restrictionEffects) {
    ability=restrictionEffects.getAbility(effect.getId());
    if (!(ability instanceof StaticAbility) || ability.isInUseableZone(game,false)) {
      log.error(uuid + "String_Node_Str" + ability+ "String_Node_Str"+ effect.applies(attacker,ability,game));
      log.error(uuid + "String_Node_Str" + ability+ "String_Node_Str"+ effect.applies(blocker,ability,game));
    }
 else {
      boolean usable=ability.isInUseableZone(game,false);
      log.error(uuid + "String_Node_Str" + (ability instanceof StaticAbility)+ "String_Node_Str"+ ability);
      log.error(uuid + "String_Node_Str" + usable+ "String_Node_Str"+ ability);
      if (!usable) {
        Constants.Zone zone=ability.getZone();
        log.error(uuid + "String_Node_Str" + zone);
        MageObject object=game.getObject(ability.getSourceId());
        log.error(uuid + "String_Node_Str" + object);
        if (object != null) {
          log.error(uuid + "String_Node_Str" + object.getAbilities().contains(ability));
        }
        Constants.Zone test=game.getState().getZone(ability.getSourceId());
        log.error(uuid + "String_Node_Str" + test);
      }
    }
  }
  log.error(uuid);
}

Fixed version (ground truth):
private static void traceCombat(Game game,Permanent attacker,Permanent blocker){
  String uuid="String_Node_Str" + UUID.randomUUID() + "String_Node_Str";
  log.error(uuid + "String_Node_Str");
  log.error(uuid + blocker.getName() + "String_Node_Str"+ attacker.getName());
  log.error(uuid);
  log.error(uuid + "String_Node_Str");
  for (  Ability ability : attacker.getAbilities()) {
    log.error(uuid + "String_Node_Str" + ability.toString()+ "String_Node_Str"+ ability.getId());
  }
  log.error(uuid + "String_Node_Str");
  for (  Ability ability : blocker.getAbilities()) {
    log.error(uuid + "String_Node_Str" + ability.toString()+ "String_Node_Str"+ ability.getId());
  }
  log.error(uuid);
  log.error(uuid + "String_Node_Str" + FlyingAbility.getInstance().getId());
  log.error(uuid + "String_Node_Str" + ReachAbility.getInstance().getId());
  log.error(uuid);
  log.error(uuid + "String_Node_Str");
  Ability ability=attacker.getAbilities().size() > 0 ? attacker.getAbilities().get(0) : null;
  ContinuousEffectsList<RestrictionEffect> restrictionEffects=(ContinuousEffectsList<RestrictionEffect>)game.getContinuousEffects().getRestrictionEffects();
  for (  RestrictionEffect effect : restrictionEffects) {
    log.error(uuid + "String_Node_Str" + effect);
    log.error(uuid + "String_Node_Str" + effect.getId());
    log.error(uuid + "String_Node_Str" + effect.applies(attacker,ability,game));
    log.error(uuid + "String_Node_Str" + effect.applies(blocker,ability,game));
  }
  traceForPermanent(game,attacker,uuid,restrictionEffects);
  traceForPermanent(game,blocker,uuid,restrictionEffects);
  log.error(uuid);
}