Error in different order among brace expansions

[chengxuncc]

package main

import (
    "fmt"

    "github.com/gobwas/glob"
)

func main() {
    fmt.Println("pattern","{,*.}google*")
    g := glob.MustCompile("{,*.}google*")
    fmt.Println("Actual:", g.Match("google.com"), "Expected:", true)
    fmt.Println("Actual:", g.Match("a.google.com"), "Expected:", true)
    fmt.Println("Actual:", g.Match("agoogle.com"), "Expected:", false)
    fmt.Println()

    fmt.Println("pattern","{*.,}google*")
    g = glob.MustCompile("{*.,}google*")
    fmt.Println("Actual:", g.Match("google.com"), "Expected:", true)
    fmt.Println("Actual:", g.Match("a.google.com"), "Expected:", true)
    fmt.Println("Actual:", g.Match("agoogle.com"), "Expected:", false)
}

Output

pattern {,*.}google*
Actual: true Expected: true
Actual: true Expected: true
Actual: false Expected: false

pattern {*.,}google*
Actual: false Expected: true
Actual: false Expected: true
Actual: false Expected: false