I'm not sure if the channel receive is atomic. I thought it would get a
null pointer dereference error in chanrecv at runtime.
On Monday, March 2, 2020 at 1:37:01 PM UTC+8, burak serdar wrote:
>
> On Sun, Mar 1, 2020 at 9:49 PM Yuan Ting <yuan...@ict.ac.cn <javascript:>>
> wrote:
> >
> > 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.
>
> Why should it panic? The first goroutine simply sets the channel to
> nil. The second goroutine will either block reading from a non-nil
> channel, or block reading from a nil channel. There is no code in this
> program that would panic.
>
> >
> > ch := make(chan struct{})
> > go func() {
> > ch = nil
> > }()
> > go func() {
> > <-ch
> > }()
> >
> >
> >
> > --
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>
>
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