the c:=make(chan int) is not chan buffer

[Toin1779712664]

https://github.com/GoesToEleven/GolangTraining/blame/f9a4f6cf39399a951f1b26875ed5aeee34aafb21/22_go-routines/09_channels/02_n-to-1/04_semaphore_wrong-way/main.go#L9

c:=make(chan int,20) // 20 buffer

[yossev]

isn't that an unbuffered channel or am i mistaken?