On Fri, Feb 4, 2022 at 12:30 PM Pablo Caballero <pdcv...@gmail.com> wrote:
>
> Errata
>
> Go is blocked trying to read from the channel (exec\exec.go):
>
> for range c.goroutine { if err := <-c.errch; err != nil && copyError == nil {
> copyError = err } }
>
> I think that the problem happens if you specify an io.Writer as cmd.Stdout
> and such writer doesn’t satisfy os.File (Output() uses a bytes.Buffer
> internally) because in that case a Pipe is used (to copy data between the
> writer/process). It seems like the pipe is inherited by the child process and
> isn’t closed until the child finish (blocking the goroutine that reads from
> the pipe and writes to the writer even if the parent process is gone).
For reference, this class of problems is https://go.dev/issue/23019.
Ian
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