A 28-year-old man is undergoing a treatment for pulmonary tuberculosis. He has complains of shortness of breath and a sharp chest pain on the right that appeared suddenly. Percussion detects a bandbox resonance over the right lung, auscultation detects no breathing there. X-ray has shown that the right lung is collapsed to its root by 1/2 of its volume, the heart and mediastinal organs are shifted to the left. What complication has developed in this patient?