path/filepath: EvalSymlinks fails when specifying symbolic links under /tmp on macOS

[matsuyoshi30]

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

$ go version
go version go1.19.5 darwin/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
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/matsuyoshi/Library/Caches/go-build"
GOENV="/Users/matsuyoshi/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/matsuyoshi/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/matsuyoshi/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="go1.19.5"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/matsuyoshi/tmp/go.mod"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/y_/5qxlxmyd4bs7mps83j1rhcpr0000gn/T/go-build1061963943=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

% pwd
/Users/matsuyoshi/tmp
% ls -l dst
lrwxr-xr-x  1 matsuyoshi  staff  8  1 19 00:28 dst@ -> /tmp/src
% cat main.go
package main

import (
        "fmt"
        "path/filepath"
)

func main() {
	v, err := filepath.EvalSymlinks("dst")
	fmt.Println(v)
	fmt.Println(err)
}
% go run main.go

What did you expect to see?

/private/tmp/src

What did you see instead?

lstat private: no such file or directory

On macOS, /tmp is a symbolic link to private/tmp, but I think filepath.EvalSymlinks doesn't handle this case when traversing symbolic links.

[gopherbot]

Change https://go.dev/cl/461761 mentions this issue: path/filepath: EvalSymlinks handles symbolic links under /tmp on macOS