package main

import "fmt"

func main() {
    ch1 := make(chan int)
    ch2 := make(chan int)
    go func() {
        ch1 <- 1
        ch2 <- 2
    }()
    var result int
    for i := 0; i < 2; i++ {
        select {
        case result = <-ch1:
            fmt.Println(result)
        case result := <-ch2: // <-- shadowing
            fmt.Println(result)
        }
    }
    fmt.Println(result) // expect 2, got 1
}