Please answer these questions before submitting your issue. Thanks!

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

go version go1.10 darwin/amd64

Does this issue reproduce with the latest release?

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

GOROOT="/usr/local/Cellar/go/1.10/libexec"

What did you do?

If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.

code:

func main() {
	s := []string{"c", "ca", "b", "d", "a"}

	sort.Strings(s)
	fmt.Println(s)

	i := sort.SearchStrings(s, "bx")
	println(i)
}

➜  ~ go run test.go
[a b c ca d]
2

What did you expect to see?

it should return 5

What did you see instead?