A DESCRIPTION OF THE PROBLEM :
All of the following are parsed by UUID#fromString but are actually invalid:

0-0-0-0-0
+0000000-0000-0000-0000-000000000000
00000000-+000-0000-0000-000000000000
00000000-0000-+000-0000-000000000000
00000000-0000-0000-+000-000000000000
00000000-0000-0000-0000-+00000000000
0-0-0-0-0000000000000000000000000000
0000000000000000000000000000-0-0-0-0

Additionally the following non-hexadecimal chars are being accepted as well:

\u0660
\u0661
\u0662
\u0663
\u0664
\u0665
\u0666
\u0667
\u0668
\u0669
\u06F0
\u06F1
\u06F2
\u06F3
\u06F4
\u06F5
\u06F6
\u06F7
\u06F8
\u06F9
\u07C0
\u07C1
\u07C2
\u07C3
\u07C4
\u07C5
\u07C6
\u07C7
\u07C8
\u07C9
\u0966
\u0967
\u0968
\u0969
\u096A
\u096B
\u096C
\u096D
\u096E
\u096F
\u09E6
\u09E7
\u09E8
\u09E9
\u09EA
\u09EB
\u09EC
\u09ED
\u09EE
\u09EF
\u0A66
\u0A67
\u0A68
\u0A69
\u0A6A
\u0A6B
\u0A6C
\u0A6D
\u0A6E
\u0A6F
\u0AE6
\u0AE7
\u0AE8
\u0AE9
\u0AEA
\u0AEB
\u0AEC
\u0AED
\u0AEE
\u0AEF
\u0B66
\u0B67
\u0B68
\u0B69
\u0B6A
\u0B6B
\u0B6C
\u0B6D
\u0B6E
\u0B6F
\u0BE6
\u0BE7
\u0BE8
\u0BE9
\u0BEA
\u0BEB
\u0BEC
\u0BED
\u0BEE
\u0BEF
\u0C66
\u0C67
\u0C68
\u0C69
\u0C6A
\u0C6B
\u0C6C
\u0C6D
\u0C6E
\u0C6F
\u0CE6
\u0CE7
\u0CE8
\u0CE9
\u0CEA
\u0CEB
\u0CEC
\u0CED
\u0CEE
\u0CEF
\u0D66
\u0D67
\u0D68
\u0D69
\u0D6A
\u0D6B
\u0D6C
\u0D6D
\u0D6E
\u0D6F
\u0DE6
\u0DE7
\u0DE8
\u0DE9
\u0DEA
\u0DEB
\u0DEC
\u0DED
\u0DEE
\u0DEF
\u0E50
\u0E51
\u0E52
\u0E53
\u0E54
\u0E55
\u0E56
\u0E57
\u0E58
\u0E59
\u0ED0
\u0ED1
\u0ED2
\u0ED3
\u0ED4
\u0ED5
\u0ED6
\u0ED7
\u0ED8
\u0ED9
\u0F20
\u0F21
\u0F22
\u0F23
\u0F24
\u0F25
\u0F26
\u0F27
\u0F28
\u0F29
\u1040
\u1041
\u1042
\u1043
\u1044
\u1045
\u1046
\u1047
\u1048
\u1049
\u1090
\u1091
\u1092
\u1093
\u1094
\u1095
\u1096
\u1097
\u1098
\u1099
\u17E0
\u17E1
\u17E2
\u17E3
\u17E4
\u17E5
\u17E6
\u17E7
\u17E8
\u17E9
\u1810
\u1811
\u1812
\u1813
\u1814
\u1815
\u1816
\u1817
\u1818
\u1819
\u1946
\u1947
\u1948
\u1949
\u194A
\u194B
\u194C
\u194D
\u194E
\u194F
\u19D0
\u19D1
\u19D2
\u19D3
\u19D4
\u19D5
\u19D6
\u19D7
\u19D8
\u19D9
\u1A80
\u1A81
\u1A82
\u1A83
\u1A84
\u1A85
\u1A86
\u1A87
\u1A88
\u1A89
\u1A90
\u1A91
\u1A92
\u1A93
\u1A94
\u1A95
\u1A96
\u1A97
\u1A98
\u1A99
\u1B50
\u1B51
\u1B52
\u1B53
\u1B54
\u1B55
\u1B56
\u1B57
\u1B58
\u1B59
\u1BB0
\u1BB1
\u1BB2
\u1BB3
\u1BB4
\u1BB5
\u1BB6
\u1BB7
\u1BB8
\u1BB9
\u1C40
\u1C41
\u1C42
\u1C43
\u1C44
\u1C45
\u1C46
\u1C47
\u1C48
\u1C49
\u1C50
\u1C51
\u1C52
\u1C53
\u1C54
\u1C55
\u1C56
\u1C57
\u1C58
\u1C59
\uA620
\uA621
\uA622
\uA623
\uA624
\uA625
\uA626
\uA627
\uA628
\uA629
\uA8D0
\uA8D1
\uA8D2
\uA8D3
\uA8D4
\uA8D5
\uA8D6
\uA8D7
\uA8D8
\uA8D9
\uA900
\uA901
\uA902
\uA903
\uA904
\uA905
\uA906
\uA907
\uA908
\uA909
\uA9D0
\uA9D1
\uA9D2
\uA9D3
\uA9D4
\uA9D5
\uA9D6
\uA9D7
\uA9D8
\uA9D9
\uA9F0
\uA9F1
\uA9F2
\uA9F3
\uA9F4
\uA9F5
\uA9F6
\uA9F7
\uA9F8
\uA9F9
\uAA50
\uAA51
\uAA52
\uAA53
\uAA54
\uAA55
\uAA56
\uAA57
\uAA58
\uAA59
\uABF0
\uABF1
\uABF2
\uABF3
\uABF4
\uABF5
\uABF6
\uABF7
\uABF8
\uABF9
\uFF10
\uFF11
\uFF12
\uFF13
\uFF14
\uFF15
\uFF16
\uFF17
\uFF18
\uFF19
\uFF21
\uFF22
\uFF23
\uFF24
\uFF25
\uFF26
\uFF41
\uFF42
\uFF43
\uFF44
\uFF45
\uFF46

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
IllegalArgumentException

FREQUENCY : always