errors

[texrg]

$ hexdump -C t1.mrb
00000000 52 49 54 45 30 30 30 33 9a a8 00 00 00 cd 4d 41 |RITE0003......MA|
00000010 54 5a 30 30 30 30 49 52 45 50 00 00 00 96 30 30 |TZ0000IREP....00|
00000020 30 30 00 00 00 46 00 01 00 04 00 01 00 00 00 07 |00...F..........|
00000030 00 80 00 48 01 00 00 c0 00 80 00 46 00 80 00 06 |...H.......F....|
00000040 01 00 00 3d 00 80 00 a0 00 00 00 4a 00 00 00 01 |...=.......J....|
00000050 00 00 05 77 6f 72 6c 64 00 00 00 01 00 05 68 65 |...world......he|
00000060 6c 6c 6f 00 00 00 00 4a 00 03 00 06 00 00 00 00 |llo....J........|
00000070 00 07 00 00 02 00 00 26 01 80 00 06 02 00 00 3d |.......&.......=|
00000080 02 80 40 01 02 01 40 3e 01 80 00 a0 01 80 00 29 |..@...@>.......)|
00000090 00 00 00 02 00 00 07 48 65 6c 6c 6f 2c 20 00 00 |.......Hello, ..|
000000a0 00 00 00 00 01 00 04 70 75 74 73 00 4c 56 41 52 |.......puts.LVAR|
000000b0 00 00 00 19 00 00 00 01 00 03 6d 73 67 00 00 00 |..........msg...|
000000c0 01 ff ff 00 00 45 4e 44 00 00 00 00 08 |.....END.....|
000000cd

$bin/mrb_parser ./t1.mrb
mrb_parser-0.1.0/lib/mrb_parser/utils.rb:17:in read_format': undefined method unpack' for nil:NilClass (NoMethodError)
from / mrb_parser-0.1.0/lib/mrb_parser/utils.rb:25:in read_uint8' from / /mrb_parser-0.1.0/lib/mrb_parser/irep_record.rb:48:in block in parse_pool'
...