program panic on my first try

[kuangchanglang]

panic: runtime error: index out of range

goroutine 1 [running]:
panic(0x668ca0, 0xc82000e090)
/usr/local/go/src/runtime/panic.go:481 +0x3e6
github.com/natefinch/graffiti/tags.(_visitor).Visit(0xc8200c6930, 0x7faa6a903bc0, 0xc820078f60, 0x0, 0x0)
/home/kcln1687/gopath/src/github.com/natefinch/graffiti/tags/generate.go:126 +0x4d6
go/ast.Walk(0x7faa6a903a78, 0xc8200c6930, 0x7faa6a903bc0, 0xc820078f60)
/usr/local/go/src/go/ast/walk.go:52 +0x56
go/ast.Walk(0x7faa6a903a78, 0xc8200c6930, 0x7faa6a903ad0, 0xc820070ec0)
/usr/local/go/src/go/ast/walk.go:331 +0x1f7d
go/ast.walkDeclList(0x7faa6a903a78, 0xc8200c6930, 0xc8200b0900, 0x9, 0x10)
/usr/local/go/src/go/ast/walk.go:38 +0xd5
go/ast.Walk(0x7faa6a903a78, 0xc8200c6930, 0x7faa6a903a48, 0xc8200aea00)
/usr/local/go/src/go/ast/walk.go:353 +0x29b9
github.com/natefinch/graffiti/tags.gen(0x7ffe357c3681, 0x9, 0xc8200805e0, 0x2, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
/home/kcln1687/gopath/src/github.com/natefinch/graffiti/tags/generate.go:81 +0x122
github.com/natefinch/graffiti/tags.genfile(0x7ffe357c3681, 0x9, 0xc8200805e0, 0x2, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
/home/kcln1687/gopath/src/github.com/natefinch/graffiti/tags/generate.go:64 +0x143
github.com/natefinch/graffiti/tags.Generate(0x7ffe357c3681, 0x9, 0xc8200805e0, 0x2, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
/home/kcln1687/gopath/src/github.com/natefinch/graffiti/tags/generate.go:42 +0xe6
main.genCmd.func1(0xc82009a6c0, 0xc8200805c0, 0x2, 0x2)
/home/kcln1687/gopath/src/github.com/natefinch/graffiti/main.go:56 +0x1b2
github.com/spf13/cobra.(_Command).execute(0xc82009a6c0, 0xc8200804a0, 0x2, 0x2, 0x0, 0x0)
/home/kcln1687/gopath/src/github.com/spf13/cobra/command.go:575 +0x896
github.com/spf13/cobra.(_Command).ExecuteC(0xc82009a480, 0xc82009a6c0, 0x0, 0x0)
/home/kcln1687/gopath/src/github.com/spf13/cobra/command.go:661 +0x55c
github.com/spf13/cobra.(_Command).Execute(0xc82009a480, 0x0, 0x0)
/home/kcln1687/gopath/src/github.com/spf13/cobra/command.go:620 +0x2d
main.main()
/home/kcln1687/gopath/src/github.com/natefinch/graffiti/main.go:16 +0x25

[natefinch]

Ug, sorry. This repo isn't at all production ready. It's just barely past proof of concept. I'll poke at it sometime in the next week and try to get it to at least compile and run correctly.