package main
func m() {
c1 := make(chan int, 1)
c2 := make(chan int, 1)
go func() {
c1 <- 1
c2 <- 1
}()
select {
case <-c1:
case <-c2:
println("no way")
}
}
func main() {
for i := 0; i < 1000000; i++ {
m()
}
}
There are two channels c1, c2.
We are sending data to c1 and c2 in a goroutine. And we have a select to receive the data from these two channels and return.
The question is: we are send data to c1 first and receive from c1 first in most cases. But sometimes we receive from c2 first when sending to c1 first. Why？