A 42-year-old patient complains of pain in the epigastral area, vomiting; vomit masses have the color of coffee-grounds; the patient suffers from melena. Anamnesis records gastric ulcer disease. Blood formula: erythrocytes - 2,8 × 1012/l, leukocytes -8 × 109/l, Hb- 90 g/l. What complication is it?