What version of Go are you using (go version)?

$ go version
go version go-dev.go2go-20200801 darwin/amd64

Does this issue reproduce with the latest release?

Yes, with the above go2go branch and commit date

What operating system and processor architecture are you using (go env)?

darwin amd64

What did you do?

$go tool go2go run program.go2
// program.go2
package main

func Print(s []int) {
for _, v := range s {
println(v)
}
}

func Print[T](s []T) {
for _, v := range s {
println(v)
}
}

func main() {
Print([]int{1, 2, 3})
}

What did you expect to see?

1
2
3
NOTE: I'd like to see the compiler use non-generic version if both generic/concrete functions exist.
That also applies to generic types as well.
This also mean existing client code doesn't have to change when generics finally come to Go, so Go2 generics is still effectively backward compatible with Go1.

What did you see instead?

type checking failed for main
/var/folders/v9/jczv1kzj41329fqmmsp9m1c40000gn/T/go2go-run303878027/program.go2:9:6: Print redeclared in this block
/var/folders/v9/jczv1kzj41329fqmmsp9m1c40000gn/T/go2go-run303878027/program.go2:3:6: other declaration of Print