Hi Matthias, Ian was right, the reason was the NUL bytes in the parameters. The parameters were from a socket with extra NUL bytes and I forgot to trim them.
Thanks for your advice anyway (: On 14 May 2018 at 01:27, Matthias B. <m...@winterdrache.de> wrote: > On Fri, 11 May 2018 20:36:18 -0700 (PDT) > Tashi Lu <dotslash...@gmail.com> wrote: > >> Hi gophers, >> >> I faced a strange problem： os/exec always fails with `fork/exec >> /usr/bin/qemu-img: invalid argument'. >> >> Simplified code is at https://play.golang.org/p/v1APfzmS2p9. It seems >> this simplified snippet runs well without errors, but my real code is >> no more than just some variable initializations than this snippet. So >> I suspect it's the context's problem, but my context is too complex >> to simplify and put onto the playground. What I can think of that >> what might be linked to this error is that this function is run in a >> goroutine. But I did write a simplified goroutine version, sadly it >> worked well too... I had no idea how to do further debugging. >> >> And further, the executable is not to blame, it fails with the same >> error even if I substitute the executable to `ls' or anything else. > > Try deleting the relevant lines of code and then write them again, > actually type them again, without referring to and especially not > copy'n'pasting code from somewhere else. Sounds stupid I know, but I've > given this advice many times over the years and it has an extremely > high success rate in the situation you're describing. > > MSB > > -- > Light travels faster than sound. This is why some people appear bright > until you hear them speak. > > -- > You received this message because you are subscribed to a topic in the Google > Groups "golang-nuts" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/golang-nuts/3aKF5NonPUc/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
