testenv.MustHaveGoBuild(t)
	testenv.MustHaveCGO(t)

	goos, err := goEnv("GOOS")
	if err != nil {
		t.Fatal(err)
	}
	goarch, err := goEnv("GOARCH")
	if err != nil {
		t.Fatal(err)
	}
	// The msan tests require support for the -msan option.
	if !compilerRequiredTsanVersion(goos, goarch) {
		t.Skipf("skipping on %s/%s; compiler version for -tsan option is too old.", goos, goarch)
	}

	t.Parallel()
	requireOvercommit(t)

	case "ip", "ip4", "ip6":
		switch runtime.GOOS {
		case "plan9":
			return false
		default:
			if os.Getuid() != 0 {
				return false
			}
		}
	case "unix", "unixgram":
		switch runtime.GOOS {
		case "android", "ios", "plan9", "windows":
			return false
		case "aix":
			return unixEnabledOnAIX
		}
	case "unixpacket":
		switch runtime.GOOS {
		case "aix", "android", "darwin", "ios", "plan9", "windows":

	for _, p := range platform.List {
		broken := platform.Broken(p.GOOS, p.GOARCH)
		if broken && !*brokenFlag {
			continue
		}
		if *jsonFlag {
			results = append(results, jsonResult{
				GOOS:         p.GOOS,
				GOARCH:       p.GOARCH,
				CgoSupported: platform.CgoSupported(p.GOOS, p.GOARCH),
				FirstClass:   platform.FirstClass(p.GOOS, p.GOARCH),
				Broken:       broken,
			})
		}
	}

go list asdfasdfasdf  # succeeds because of -e
go list runtime
stdout '[\\/]runtime$'

env GOFLAGS=-race OLDGOARCH=$GOARCH OLDGOOS=$GOOS GOARCH=386 GOOS=linux
! go list runtime
stderr 'race is not supported on linux/386'

env GOARCH=$OLDGOARCH GOOS=$OLDGOOS

# go env succeeds even though -f={{.Dir}} is inappropriate
go env

# bad flags are diagnosed
env GOFLAGS=-typoflag
! go list runtime

			if nerr, ok := err.(Error); (!ok || !nerr.Timeout()) && runtime.GOOS != "windows" { // Windows returns WSAEMSGSIZE
				t.Fatal(err)
			}
		}
	}
}

func TestUDPReadSizeError(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if !testableNetwork("udp") {
		t.Skipf("skipping: udp not available")
	}

	InstallSuffix string   `json:",omitempty"` // suffix to use in the name of the install dir
}

func newContext(c *build.Context) *Context {
	return &Context{
		GOARCH:        c.GOARCH,
		GOOS:          c.GOOS,
		GOROOT:        c.GOROOT,
		GOPATH:        c.GOPATH,
		CgoEnabled:    c.CgoEnabled,
		UseAllFiles:   c.UseAllFiles,
		Compiler:      c.Compiler,
		BuildTags:     c.BuildTags,
		ToolTags:      c.ToolTags,

	case "ip+nopriv":
		// This is an internal network name for testing on the
		// package net of the standard library.
		switch runtime.GOOS {
		case "android", "fuchsia", "hurd", "ios", "js", "nacl", "plan9", "wasip1", "windows":
			return false
		}
	case "ip", "ip4", "ip6":
		switch runtime.GOOS {
		case "fuchsia", "hurd", "js", "nacl", "plan9", "wasip1":
			return false
		default:
			if os.Getuid() != 0 {
				return false

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build aix

package goos

const GOOS = `aix`

const IsAix = 1
const IsAndroid = 0
const IsDarwin = 0
const IsDragonfly = 0
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 0
const IsJs = 0
const IsLinux = 0
const IsNacl = 0
const IsNetbsd = 0
const IsOpenbsd = 0
const IsPlan9 = 0
const IsSolaris = 0
const IsWasip1 = 0

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build dragonfly

package goos

const GOOS = `dragonfly`

const IsAix = 0
const IsAndroid = 0
const IsDarwin = 0
const IsDragonfly = 1
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 0
const IsJs = 0
const IsLinux = 0
const IsNacl = 0
const IsNetbsd = 0
const IsOpenbsd = 0
const IsPlan9 = 0
const IsSolaris = 0

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build openbsd

package goos

const GOOS = `openbsd`

const IsAix = 0
const IsAndroid = 0
const IsDarwin = 0
const IsDragonfly = 0
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 0
const IsJs = 0
const IsLinux = 0
const IsNacl = 0
const IsNetbsd = 0
const IsOpenbsd = 1
const IsPlan9 = 0
const IsSolaris = 0