Gregory Man

Decode function panics on some inputs.

Decoder spending 87 seconds (on my laptop) to decode: `"|a-463537550:\x0e\x01\x1f\x15\x00\x01\x05\f\f\x13"`

Programm panics then decoding flowing string `"|C040000000000000000000:"` ``` panic: runtime error: makeslice: len out of range [recovered] panic: runtime error: makeslice: len out of range goroutine 29 [running]: testing.tRunner.func1(0x8203a0e10) /usr/local/Cellar/go/1.5/libexec/src/testing/testing.go:450...