JuniorTheoryCommon

What happens when this program is built and run?

package main

import "fmt"

func main() {
    ch := make(chan int)
    ch <- 1
    fmt.Println(<-ch)
}

Runtime error: all goroutines are asleep (deadlock)

Expecting 1: an unbuffered channel stores nothing, so ch <- 1 waits for a receiver, and the receive on the next line never starts.
Expecting a silent hang: the runtime sees that every goroutine is blocked and stops the program with fatal error: all goroutines are asleep - deadlock!.

JuniorTheoryCommon

package main

import "fmt"

func main() {
    ch := make(chan int)
    ch <- 1
    fmt.Println(<-ch)
}

Runtime error: all goroutines are asleep (deadlock)

Expecting 1: an unbuffered channel stores nothing, so ch <- 1 waits for a receiver, and the receive on the next line never starts.
Expecting a silent hang: the runtime sees that every goroutine is blocked and stops the program with fatal error: all goroutines are asleep - deadlock!.