On Sat, Jun 25, 2016 at 12:34 PM, Val <delepl...@gmail.com> wrote:
> Hello
> It seems that this code doesn't compile :
>
> func main() {
> var err error
> err = f()
> }
>
> prog.go:8: err declared and not used
>
>
> but this one does :
>
> func main() {
> var err error
> g := func() {
> err = f()
> }
> g()
> }
>
> Is the function binding regarded as a "use"? Or does escape analysis decide
> to not check too deep about never-read variables?
>
> Whether expected or not, I supposed this compiler behavior won't change,
> because of the Go1 compatibility promise.
While the rest of this thread gives something of an explanation, I
think this is a bug, and I think it could be fixed in a future
release. This is https://golang.org/issue/3059.
The gccgo compiler does give an error for this code.
Ian
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