# sort_hash_bug.pl:18: [
#   "HASH(0x253f0c8)",
#   "HASH(0x25350c8)",
#   "HASH(0x268aa20)",
#   "HASH(0xeea828)",
#   "HASH(0x2535548)",
#   "HASH(0x2535128)",
#   "HASH(0x268aab0)",
#   "HASH(0x2535260)",
#   "HASH(0x268a840)",
#   "HASH(0x268a918)",
# ]
# sort_hash_bug.pl:19: [                                       # <--- WTF?
#   [
#     {},
#     { AZ => "AZ", EM => "EM", RY => "RY" },
#     {},
#     { GT => "GT", JR => "JR", RZ => "RZ" },
#     { HY => "HY" },
#     { HT => "HT" },
#     { VH => "VH", WU => "WU" },
#     { GR => "GR", HH => "HH", HM => "HM", JC => "JC", WJ => "WJ" },
#     {},
#     { BK => "BK", UH => "UH", XX => "XX", ZN => "ZN" },
#   ],
# ]
# sort_hash_bug.pl:20: [
#   "HASH(0x25350c8)",
#   "HASH(0x2535128)",
#   "HASH(0x2535260)",
#   "HASH(0x2535548)",
#   "HASH(0x253f0c8)",
#   "HASH(0x268a840)",
#   "HASH(0x268a918)",
#   "HASH(0x268aa20)",
#   "HASH(0x268aab0)",
#   "HASH(0xeea828)",
# ]