> So is my analysis correct? I don't think so, but you've hidden the important parts of the backtrace which would show exactly where the error is. Try trimming your program down to the *minimum* which reproduces the problem, then post the *entire* reproducer so we can run it and see the problem for ourselves.
> I am using go1.18 Go 1.18 support ended 2 years and 4 months ago, according to https://endoflife.date/go On Friday, 6 June 2025 at 11:30:49 UTC+1 Zhaoxun Yan wrote: > -------------------- > panic: runtime error: invalid memory address or nil pointer dereference > [signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x6646f2] > > goroutine 1 [running]: > util.CommandArgs({0xc000093cb0?, 0x2?, 0xc000071380?}) > /home/zxun/src/util/util.go:49 +0xf2 > -------------------- > This error occurred because package [main] uses a function called > "CommandArgs" from my self-built package [util] with args in another > package [conf] in the same directory. Package [util] got lost because it > does not know where is package [conf] > like this > [util] /home/zxun/src/util.go > [conf] /home/zxun/src/conf.go > [main] /home/zxun/src/main.go... > /home/zxun/src/go.mod: > > require( > util v0.0.0 > ... > replace util => ../util > > The usage line in main.go: > fmt.Println( util.CommandArgs([]string{conf.IreportExec, > conf.IreportScript, "redis"}) ) > > util.CommandArgs: > > func CommandArgs(args []string) string{ > if len(args) ==0{ > return "args are empty！" > } > var s string > if len(args) ==1{ > out, er := exec.Command(args[0]).CombinedOutput() > s = er.Error()+string(out) > }else{ > out, er := exec.Command(args[0],args[1:]...).CombinedOutput() > s = er.Error()+string(out) > fmt.Println(s) > } > return s > } > > So is my analysis correct? I have not seen s printed yet, because s shall > include "<nil>" at the beginning. I am using go1.18. If the cause is util > package cannot access a variable in conf, is it possible to walk around by > a deepcopy of the string array (which will be in package main)? > > Thanks in advance. > -- 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. To view this discussion visit https://groups.google.com/d/msgid/golang-nuts/73fe858a-e520-4580-94d3-cc2739eab076n%40googlegroups.com.
