I write a simple program likes below and it triggers a data race alarm with
-race flag. But no matter how I run, this program will not panic. I know it
is legal to receive messages from nil channels, but I don't quite
understand why this program does not panic in the presence of data races.
ch := make(chan struct{})
go func() {
ch = nil
}()
go func() {
<-ch
}()
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