Program: 57793
Project: 57793
Buggy source:
@Override public void create(){
  font=new BitmapFont();
  batch=new SpriteBatch();
  message="String_Node_Str";
  if (PurchaseSystem.hasManager()) {
    final String IAP_TEST_CONSUMEABLE="String_Node_Str";
    PurchaseManagerConfig config=new PurchaseManagerConfig();
    config.addOffer(new Offer().setType(OfferType.CONSUMABLE).setIdentifier(IAP_TEST_CONSUMEABLE).putIdentifierForStore(PurchaseManagerConfig.STORE_NAME_ANDROID_GOOGLE,"String_Node_Str"));
    PurchaseSystem.install(new PurchaseObserver(){
      @Override public void handleRestore(      Transaction[] transactions){
        message("String_Node_Str" + transactions.length + "String_Node_Str");
        for (int i=0; i < transactions.length; i++) {
          message("String_Node_Str" + transactions[i].getIdentifier() + "String_Node_Str");
        }
        message("String_Node_Str" + IAP_TEST_CONSUMEABLE + "String_Node_Str");
        PurchaseSystem.purchase(IAP_TEST_CONSUMEABLE);
      }
      @Override public void handleRestoreError(      Throwable e){
        message("String_Node_Str" + e + "String_Node_Str");
        throw new GdxRuntimeException(e);
      }
      @Override public void handleInstall(){
        message("String_Node_Str" + PurchaseSystem.storeName() + "String_Node_Str");
        message("String_Node_Str");
        PurchaseSystem.purchaseRestore();
      }
      @Override public void handleInstallError(      Throwable e){
        message("String_Node_Str" + e + "String_Node_Str");
        throw new GdxRuntimeException(e);
      }
      @Override public void handlePurchase(      Transaction transaction){
        message("String_Node_Str" + transaction.getIdentifier() + "String_Node_Str");
        Gdx.app.postRunnable(new Runnable(){
          @Override public void run(){
            message("String_Node_Str");
            PurchaseSystem.dispose();
            message("String_Node_Str");
          }
        }
);
      }
      @Override public void handlePurchaseError(      Throwable e){
        message("String_Node_Str" + e + "String_Node_Str");
        throw new GdxRuntimeException(e);
      }
      @Override public void handlePurchaseCanceled(){
      }
    }
,config);
  }
 else {
    message("String_Node_Str");
  }
}

Fixed version (ground truth):
@Override public void create(){
  font=new BitmapFont();
  batch=new SpriteBatch();
  message="String_Node_Str";
  if (PurchaseSystem.hasManager()) {
    final String IAP_TEST_CONSUMEABLE="String_Node_Str";
    final String IAP_TEST_NONCONSUMEABLE="String_Node_Str";
    PurchaseManagerConfig config=new PurchaseManagerConfig();
    config.addOffer(new Offer().setType(OfferType.CONSUMABLE).setIdentifier(IAP_TEST_CONSUMEABLE).putIdentifierForStore(PurchaseManagerConfig.STORE_NAME_ANDROID_GOOGLE,"String_Node_Str"));
    config.addOffer(new Offer().setType(OfferType.ENTITLEMENT).setIdentifier(IAP_TEST_NONCONSUMEABLE));
    PurchaseSystem.install(new PurchaseObserver(){
      @Override public void handleRestore(      Transaction[] transactions){
        message("String_Node_Str" + transactions.length + "String_Node_Str");
        for (int i=0; i < transactions.length; i++) {
          message("String_Node_Str" + transactions[i].getIdentifier() + "String_Node_Str");
        }
        message("String_Node_Str" + IAP_TEST_CONSUMEABLE + "String_Node_Str");
        PurchaseSystem.purchase(IAP_TEST_CONSUMEABLE);
      }
      @Override public void handleRestoreError(      Throwable e){
        message("String_Node_Str" + e + "String_Node_Str");
        throw new GdxRuntimeException(e);
      }
      @Override public void handleInstall(){
        message("String_Node_Str" + PurchaseSystem.storeName() + "String_Node_Str");
        message("String_Node_Str");
        PurchaseSystem.purchaseRestore();
      }
      @Override public void handleInstallError(      Throwable e){
        message("String_Node_Str" + e + "String_Node_Str");
        throw new GdxRuntimeException(e);
      }
      @Override public void handlePurchase(      Transaction transaction){
        message("String_Node_Str" + transaction.getIdentifier() + "String_Node_Str");
        Gdx.app.postRunnable(new Runnable(){
          @Override public void run(){
            message("String_Node_Str");
            PurchaseSystem.dispose();
            message("String_Node_Str");
          }
        }
);
      }
      @Override public void handlePurchaseError(      Throwable e){
        message("String_Node_Str" + e + "String_Node_Str");
        throw new GdxRuntimeException(e);
      }
      @Override public void handlePurchaseCanceled(){
        message("String_Node_Str");
        Gdx.app.postRunnable(new Runnable(){
          @Override public void run(){
            message("String_Node_Str");
            PurchaseSystem.dispose();
            message("String_Node_Str");
          }
        }
);
      }
    }
,config);
  }
 else {
    message("String_Node_Str");
  }
}