stdout '"GO111MODULE": "auto"'
stdout '"CGO_CFLAGS": "nodefault"'
stdout '"CGO_CPPFLAGS": "nodefault"'

[GOOS:windows] env GOOS=linux
[!GOOS:windows] env GOOS=windows
[GOARCH:amd64] env GOARCH=arm64
[!GOARCH:amd64] env GOARCH=amd64

go env -changed GOOS
[GOOS:windows] stdout 'set GOOS=linux'
[!GOOS:windows] stdout 'GOOS=''windows'''
go env -changed GOARCH
[GOARCH:amd64] stdout 'set GOARCH=arm64|GOARCH=''arm64'''

The OS specific files for the new build system are located in the `${GOOS}`
directory, and the build is coordinated by the `${GOOS}/mkall.go` program. When
the kernel or system library updates, modify the Dockerfile at
`${GOOS}/Dockerfile` to checkout the new release of the source.

To build all the files under the new build system, you must be on an amd64/Linux
system and have your GOOS and GOARCH set accordingly. Running `mkall.sh` will

# go env -w/-u checks validity of GOOS/ARCH combinations
env GOOS=
env GOARCH=
# check -w doesn't allow invalid GOOS
! go env -w GOOS=linuxx
stderr 'unsupported GOOS/GOARCH pair linuxx'
# check -w doesn't allow invalid GOARCH
! go env -w GOARCH=amd644
stderr 'unsupported GOOS/GOARCH.*/amd644$'
# check -w doesn't allow invalid GOOS with valid GOARCH
! go env -w GOOS=linuxx GOARCH=amd64

-- input --
Hello, world
 Code block here.
More text.
Tight list
 - one
 - two
 - three
Loose list
 - one

 - two

 - three

# Heading

More text.
-- gofmt --
Hello, world

	Code block here.

More text.
Tight list
  - one
  - two
  - three

Loose list

  - one

  - two

  - three

# Heading

More text.
-- text --

env GOENV=badenv
env GOOS=
env GOARCH=
env GOEXPERIMENT=

! go env
stderr '^go(\.exe)?: unknown GOEXPERIMENT badexp$'

go env -u GOEXPERIMENT

! go env
stderr '^go: unsupported GOOS/GOARCH pair bados/badarch$'

! go env -u GOOS
stderr '^go: unsupported GOOS/GOARCH pair \w+/badarch$'

! go env -u GOARCH
stderr '^go: unsupported GOOS/GOARCH pair bados/\w+$'

go env -u GOOS GOARCH

func TestCgoCallbackGC(t *testing.T) {
	t.Parallel()
	switch runtime.GOOS {
	case "plan9", "windows":
		t.Skipf("no pthreads on %s", runtime.GOOS)
	}
	if testing.Short() {
		switch {
		case runtime.GOOS == "dragonfly":
			t.Skip("see golang.org/issue/11990")
		case runtime.GOOS == "linux" && runtime.GOARCH == "arm":
			t.Skip("too slow for arm builders")
		case runtime.GOOS == "linux" && (runtime.GOARCH == "mips64" || runtime.GOARCH == "mips64le"):

	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 asan tests require support for the -asan option.
	if !platform.ASanSupported(goos, goarch) {
		t.Skipf("skipping on %s/%s; -asan option is not supported.", goos, goarch)
	}

		if tc.sanitizer == "memory" && !platform.MSanSupported(GOOS, GOARCH) {
			t.Logf("skipping %s test on %s/%s; -msan option is not supported.", name, GOOS, GOARCH)
			continue
		}
		if tc.sanitizer == "thread" && !compilerRequiredTsanVersion(GOOS, GOARCH) {
			t.Logf("skipping %s test on %s/%s; compiler version too old for -tsan.", name, GOOS, GOARCH)
			continue
		}

		t.Run(name, func(t *testing.T) {

type argvalues struct {
	osargs []string
	goos   string
	goarch string
}

type argstate struct {
	state       argvalues
	initialized bool
}

func (a *argstate) Merge(state argvalues) {
	if !a.initialized {
		a.state = state
		a.initialized = true
		return
	}
	if !slices.Equal(a.state.osargs, state.osargs) {
		a.state.osargs = nil
	}
	if state.goos != a.state.goos {
		a.state.goos = ""
	}

	return nil, fmt.Errorf("terminal: MakeRaw not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
}

func getState(fd int) (*State, error) {
	return nil, fmt.Errorf("terminal: GetState not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
}

func restore(fd int, state *State) error {
	return fmt.Errorf("terminal: Restore not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
}

func getSize(fd int) (width, height int, err error) {