for pos, char := range s {
fmt.Println( utf8.RuneLen(char) )
}
This code works in Go (pre v1) but doesn't work in Go1.
cannot use char (type []int) as type rune in function argument
I ran go fix which updated the "utf8" import to "unicode/utf8", but now I get the previous err.
The docs for rune mention a trivial conversion will resolve this error.
The code you posted works in Go1. Assuming s is a string.
Make sure you aren't unexpectedly introducing or using some other variable named char which has type []int, and make sure there are no typos in your code which would lead to unexpected usage of a different variable.