Two goroutines are using the same unbuffered channel.
One sends on it inside a select with a default clause.
The other receives from it inside a select with a default clause.
goroutine 1:
for {
select {
case obj <- ch:
default:
}
....
}
goroutine 2:
for {
select {
case ch <- obj:
default:
}
....
}
The channel is unbuffered.
Can these two goroutines ever communicate with each other?
It's a difficult thing to test if they never meet except once in a billion
attempts.
I've looked at runtime/chan.go but I'm not sure if this depends on what the
compiler generates for those select statements.
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