62    do_cu21(malloc(1), 10, pattern2, 2);             // complaint (2 bytes)  in main()
65    do_cu21(malloc(2), 10, pattern2, 2);             // no complaint  in main()
68    do_cu21(malloc(1), 10, pattern3, 2);             // 2 complaints (3 = 2+1)  in main()
71    do_cu21(malloc(2), 10, pattern3, 2);             // complaint (1 byte)  in main()
74    do_cu21(malloc(3), 10, pattern3, 2);             // no complaint  in main()
77    do_cu21(malloc(1), 10, pattern4, 4);             // complaint (4 bytes)  in main()
80    do_cu21(malloc(2), 10, pattern4, 4);             // complaint (4 bytes)  in main()
83    do_cu21(malloc(3), 10, pattern4, 4);             // complaint (4 bytes)  in main()
86    do_cu21(malloc(4), 10, pattern4, 4);             // no complaint  in main()
91    uint8_t *input = malloc(10);  in main()
94    do_cu21(malloc(4), 4, (void *)input, 2);         // complaint  in main()
97    input = malloc(10);  in main()
99    do_cu21(malloc(4), 4, (void *)input, 2);          // complaint  in main()
102    input = malloc(10);  in main()
104    do_cu21(malloc(4), 4, (void *)input, 2);          // complaint  in main()
107    input = malloc(10);  in main()
109    do_cu21(malloc(4), 4, (void *)input, 2);          // no complaint  in main()
114    input = malloc(10);  in main()
116    do_cu21(malloc(4), 4, (void *)input, 4);          // complaint  in main()