in some midis the func GetMetaChannel (message.go) returns nothing as data which results in error panic: runtime error: index out of range [0] with length 0

Must be an error in the midifile itself, but as it is just a meta message, I added this code in line 220

//check if the data contains anything

if len(data) == 0 {

return false

}

If you want, I can send you a midi throwing that error