i, s1, s2, err, v.err)
			}
			if cnt != v.cnt {
				t.Errorf("test %d, NewReader(%s) with %s discard: got %d headers, want %d headers",
					i, s1, s2, cnt, v.cnt)
			}
		}
	}
}

// TestReadHeaderOnly tests that Reader does not attempt to read special
// header-only files.
func TestReadHeaderOnly(t *testing.T) {
	f, err := os.Open("testdata/hdr-only.tar")

$0x10, INP, INP MOVD $0x20, TEMP CMPW ROUNDS, $12 LVX (PTR)(R0), RCON // lvx 4,0,6 Load first 16 bytes into RCON LVX (PTR)(TEMP), MASK ADD $0x10, PTR, PTR // addi 6,6,0x10 PTR to next 16 bytes of RCON MOVD $8, CNT // li 7,8 CNT = 8 VXOR ZERO, ZERO, ZERO // vxor 0,0,0 Zero to be zero :) MOVD CNT, CTR // mtctr 7 Set the counter to 8 (rounds) // The expanded decrypt key is the expanded encrypt key stored in reverse order. // Move OUTDEC to the last key location, and store in descending order. ADD $160,...