os.Args parsing with quotes is somehow incorrect on Windows platform

[marjune163]

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

$ go version
go version go1.15.3 windows/amd64

Does this issue reproduce with the latest release?

Yes.

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

go env Output

$ go env
set GO111MODULE=
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\vm\AppData\Local\go-build
set GOENV=C:\Users\vm\AppData\Roaming\go\env
set GOEXE=.exe
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\Users\vm\go\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\vm\go
set GOPRIVATE=
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=c:\go
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLDIR=c:\go\pkg\tool\windows_amd64
set GCCGO=gccgo
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\vm\AppData\Local\Temp\go-build776387174=/tmp/go-build -gno-record-gcc-switches

What did you do?

Source test.go:

package main

import (
	"fmt"
	"os"
)

func main() {
	if len(os.Args) > 1 {
		fmt.Println(os.Args[1])
	}
}

run:

go run test.go "D:\Data\"

What did you expect to see?

Outputs D:\Data\

What did you see instead?

Outputs D:\Data\"

[AlexRouSg]

You need to write \\ instead of \ as the shell/terminal will interpret it specially.
e.g. \n will be translated to a newline character and \" would usually mean literal " insetad of quoting

[marjune163]

Thanks a lot!