[sebastian@anne examples]$ LD_LIBRARY_PATH=$LD_CONFIG_PATH:/usr/local/lib/ ./image
image create photo bg

button .b -text "Try again!" -command {channel <- "update"}
canvas .c -width 640 -height 480 -highlightthickness 0
.c create image 0 0 -anchor nw -image bg -tags mybg
.c lower mybg
pack .b .c -expand true

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x50 pc=0x7fbc92134af1]

goroutine 1 [syscall]:
github%2ecom/nsf/gothic._Cfunc_Tk_MainLoop(0x7fbc8f9dd700, 0x40101c)
        /home/sebastian/Development/Go/src/github.com/nsf/gothic/_obj/_cgo_defun.c:210 +0x2f
github%2ecom/nsf/gothic.(*Interpreter).MainLoop(0xf8401a0000, 0x7fbc928fbf98)
        /home/sebastian/Development/Go/src/github.com/nsf/gothic/_obj/interpreter.cgo1.go:-300 +0x31
main.main()
        /home/sebastian/Development/Go/src/github.com/nsf/gothic/examples/image.go:59 +0x1bb

goroutine 2 [syscall]:
github%2ecom/nsf/gothic._Cfunc_Tk_FindPhoto(0x3fb27b0, 0x41feba0)
        /home/sebastian/Development/Go/src/github.com/nsf/gothic/_obj/_cgo_defun.c:130 +0x2f
github%2ecom/nsf/gothic.(*Interpreter).UploadImage(0xf8401a0000, 0x4959fc, 0x676200000002, 0xf84002d4e0, 0x0, ...)
        /home/sebastian/Development/Go/src/github.com/nsf/gothic/_obj/interpreter.cgo1.go:-295 +0x60
main.dispatch(0xf840001aa0, 0x0)
        /home/sebastian/Development/Go/src/github.com/nsf/gothic/examples/image.go:31 +0xc5
created by main.main
        /home/sebastian/Development/Go/src/github.com/nsf/gothic/examples/image.go:48 +0xd9