! go mod tidy
! stderr 'package nonexist is not in std'
stderr '^go: issue27063 imports\n\tnonexist.example.com: cannot find module providing package nonexist.example.com'
stderr '^go: issue27063 imports\n\tissue27063/other imports\n\tother.example.com/nonexist: cannot find module providing package other.example.com/nonexist'

! go mod vendor
! stderr 'package nonexist is not in std'

	}
	if s := checkErrorPredicate("os.IsNotExist", os.IsNotExist, err, fs.ErrNotExist); s != "" {
		return s
	}
	return ""
}

func TestErrIsNotExist(t *testing.T) {
	tmpDir := t.TempDir()
	name := filepath.Join(tmpDir, "NotExists")
	if s := testErrNotExist(t, name); s != "" {
		t.Fatal(s)
	}

	name = filepath.Join(name, "NotExists2")
	if s := testErrNotExist(t, name); s != "" {
		t.Fatal(s)
	}

-- i2/go.mod --
module example.com/i
-- i2/i.go --
package i

-- fail/m.go --
package main

import (
	_ "w"
	_ "nonexist"
)

func main() {}

-- fail/go.mod --
module localhost.fail

replace w => ../w

		}
		return s.store.Add(pod)
	case podDelete:
		if objKey, keyExist := s.fileKeyMapping[e.fileName]; keyExist {
			pod, podExist, err := s.store.GetByKey(objKey)
			if err != nil {
				return err
			}
			if !podExist {
				return fmt.Errorf("the pod with key %s doesn't exist in cache", objKey)
			}
			if err = s.store.Delete(pod); err != nil {

! go build -mod=readonly nonexist
! stderr 'import lookup disabled'
! stderr 'missing dot'
stderr '^package nonexist is not in std \('$GOROOT'[/\\]src[/\\]nonexist\)$'

! go build nonexist
! stderr 'import lookup disabled'
! stderr 'missing dot'
stderr '^package nonexist is not in std \('$GOROOT'[/\\]src[/\\]nonexist\)$'

env GOPRIVATE=
env GOVCS=
! go get rsc.io/nonexist.svn/hello
stderr '^go: rsc.io/nonexist.svn/hello: GOVCS disallows using svn for public rsc.io/nonexist.svn; see ''go help vcs''$'

# fossil is disallowed by default
env GOPRIVATE=
env GOVCS=
! go get rsc.io/nonexist.fossil/hello
stderr '^go: rsc.io/nonexist.fossil/hello: GOVCS disallows using fossil for public rsc.io/nonexist.fossil; see ''go help vcs''$'

go mod edit -go=1.999 -toolchain=go1.998

! go install rsc.io/fortune/nonexist@v0.0.1
stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'
stderr '^go: rsc.io/fortune/nonexist@v0.0.1: module rsc.io/fortune@v0.0.1 found, but does not contain package rsc.io/fortune/nonexist'

! go run rsc.io/fortune/nonexist@v0.0.1
stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'

go list -C ../strings
stdout strings
! go list -C ../nonexist
stderr 'chdir.*nonexist'

# check for -C in subcommands with custom flag parsing
# cmd/go/chdir_test.go handles the normal ones more directly.

# go doc
go doc -C ../strings HasPrefix

# go env
go env -C $OLD/custom GOMOD
stdout 'custom[\\/]go.mod'
! go env -C ../nonexist
stderr '^go: chdir ../nonexist: '

# go test
go test -C ../strings -n

env GOPRIVATE=golang.org
env CURLOPT_TIMEOUT_MS=100
env GIT_SSH_COMMAND=false

! go get -x golang.org/nonexist.git@latest
stderr '^git ls-remote https://golang.org/nonexist$'
stderr '^git ls-remote git\+ssh://golang.org/nonexist'
stderr '^git ls-remote ssh://golang.org/nonexist$'
! stderr 'git://'
stderr '^go: golang.org/nonexist.git@latest: no secure protocol found for repository$'

-- go.mod --
module example

	check("openOnly", sub, err)

	_, err = sub.Open("nonexist")
	if err == nil {
		t.Fatal("Open(nonexist): succeeded")
	}
	pe, ok := err.(*PathError)
	if !ok {
		t.Fatalf("Open(nonexist): error is %T, want *PathError", err)
	}
	if pe.Path != "nonexist" {
		t.Fatalf("Open(nonexist): err.Path = %q, want %q", pe.Path, "nonexist")
	}

	_, err = sub.Open("./")
	if !errors.Is(err, ErrInvalid) {