On Fri, Mar 8, 2019 at 1:01 PM Robert Engels <reng...@ix.netcom.com> wrote:
> The other package is closing stdin....
>
Or consuming the stdin data. Which in my experience is a slightly more
likely explanation.
On Mar 8, 2019, at 2:43 PM, Everton Marques <everton.marq...@gmail.com>
> wrote:
>
> I am debugging an issue that randomly makes the code below to hit io.EOF
> instead of reporting first byte 'u' from "ugh":
>
> $ echo "ugh" | eraseme ;# this randomly reports EOF instead of first byte
> 'u' from "ugh"
>
> $ more eraseme/main.go
> // (snip)
> func main() {
> input := bufio.NewReader(os.Stdin)
> b, err := input.ReadByte()
> log.Printf("byte='%c' error=%v", b, err)
> if err != nil {
> os.Exit(1)
> }
> }
>
> I suspect the offending code is a variable initialization from an imported
> package:
>
> var Result = newResult() // in imported package
>
> I can suppress the race by not importing that package or by turning
> newResult() into a no-op function.
>
> However, all newResult() does it to allocate/initialize variables and
> log.Printf() messages.
>
> I fail to see how newResult() could directly affect reading from os.Stdin.
>
> Question: Can anyone figure out how initialization timing (?) would insert
> io.EOF in the stream created by bufio.NewReader(os.Stdin) ?
>
> System is: go version go1.12 linux/amd64
>
> The code does NOT launch any goroutine.
>
> Thanks,
> Everton
>
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--
Kurtis Rader
Caretaker of the exceptional canines Junior and Hank
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