path.Base doesn't work for Windows paths

[shellwhale]

go version go1.19.4 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

set GO111MODULE=
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\shellwhale\AppData\Local\go-build
set GOENV=C:\Users\shellwhale\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\Users\shellwhale\go\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\shellwhale\go
set GOPRIVATE=
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\Users\shellwhale\scoop\apps\go\current
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLDIR=C:\Users\shellwhale\scoop\apps\go\current\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.19.4
set GCCGO=gccgo
set GOAMD64=v1
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=C:\Users\shellwhale\repositories\goburn\go.mod
set GOWORK=
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 -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=C:\Users\SHELLW~1\AppData\Local\Temp\go-build720779470=/tmp/go-build -gno-record-gcc-switches

What did you do?

package main
import "fmt"
import "path"

func main() {
  var x string = "\a\b\c\d"
  var output string = path.Base(x)

  fmt.Println(output)
}

A link on go.dev/play is best.

What did you expect to see?

d

What did you see instead?

./main.go:6:24: unknown escape sequence
exit status 2

[mvdan]

See https://pkg.go.dev/path/filepath. Also https://golang.org/wiki/Questions.