-switch bug with cjk character

[fy0]

package main

type DiceExprParser Peg {
//	<parser state variables>
}

Expr <- 'CJK' / '汉字' / 'test'

peg -switch test.peg ----> crashed.
panic: runtime error: index out of range [0] with length 0

if conditions are more than 2, and one of them contains cjk character, peg will be crashed.