go - Runtime Error: Index out of range when attempting to os.StartProcess -

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i can't seem figure out why it's doing this:

i have function setup this:

func (srv *server) startserver() {   // stuff make sure paths correct    path := srv.path + "server.exe"   var args = []string{     "ip=" + srv.ip,     "un=" + srv.username,     "pw=" + srv.password   }   proc, err := os.startprocess(path, args, new(os.procattr))   if err != nil {     panic(err)   } }

the startprocess method throws index out of range.

i'm missing something, can't see it.

exact error requested:

panic: runtime error: index out of range  goroutine 1 [running]: syscall.startprocess(0xc082052b70, 0x21, 0xc08200a6e0, 0x5, 0x5, 0xc08201dd60, 0x0, 0x0, 0x0, 0x0)         c:/go/src/syscall/exec_windows.go:322 +0x94c os.startprocess(0xc082052b70, 0x21, 0xc08200a6e0, 0x5, 0x5, 0xc08200a730, 0x5217e0, 0x0, 0x0)         c:/go/src/os/exec_posix.go:45 +0x482 os.startprocess(0xc082052b70, 0x21, 0xc08200a6e0, 0x5, 0x5, 0xc08200a730, 0x0, 0x0, 0x0)         c:/go/src/os/doc.go:24 +0x79 main.(*server).startserver(0x5efae0)         e:/build_test/srvmgr.go:85 +0x4e6 main.main()         e:/build_test/srvmgr.go:54 +0x141  goroutine 2 [runnable]: runtime.forcegchelper()         c:/go/src/runtime/proc.go:90 runtime.goexit()         c:/go/src/runtime/asm_amd64.s:2232 +0x1  goroutine 3 [runnable]: runtime.bgsweep()         c:/go/src/runtime/mgc0.go:82 runtime.goexit()         c:/go/src/runtime/asm_amd64.s:2232 +0x1  goroutine 4 [runnable]: runtime.runfinq()         c:/go/src/runtime/malloc.go:712 runtime.goexit()         c:/go/src/runtime/asm_amd64.s:2232 +0x1 exit status 2

edit: link simplified play.golang post reproducing it. i'm running go version 1.4.2 win/amd64

http://play.golang.org/p/s6krlmyd2i

you getting error because not set file descriptors stderr , stdout on os.procattr. seems set automatically on linux, need set them on windows.

this working example:

func (srv *server) startserver() {   // stuff make sure paths correct    path := srv.path + "server.exe"   var args = []string{     "ip=" + srv.ip,     "un=" + srv.username,     "pw=" + srv.password   }   var attr os.procattr   attr.files = []*os.file{nil, os.stdout, os.stderr}   proc, err := os.startprocess(path, args, &attr)   if err != nil {     panic(err)   } }

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