os/exec: CombinedOutput() segmentation fault (core dumped)

[drwpeng]

What version of Go are you using (go version)?

linux go1.12.7

$ go version

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (go env)?

debian in docker

go env Output

$ go env

What did you do?

What did you expect to see?

no segment fault

What did you see instead?

[mattn]

As far as I can see your screenshot, the crashed program is mpclient not Go.

[drwpeng]

I find "ProcessState" Field. I add fmt.Printf("state.....", state) to wait() function.As shown:

Then I saw the output as shown below：

[mattn]

Yes, it is state of child process. So the crashed program is mpclient.

[agnivade]

@drwpeng - please let us know if the above diagnosis is incorrect. You can also run the "./mpclient " manually to check if it generates a seg fault. As far as I can see, the Go program runs fine because it prints other lines properly after the seg fault.

And it is preferred to directly have the text output rather than a screenshot. In this case, I could not copy paste your mpclient command just because it was an image. A minor inconvenience, but it could be bigger if I had to use any of the text to reproduce some other issue.

[drwpeng]

Yes, it is a problem with mpclient. Thank you for your help.