for _, opt := range opts {
		opt(&conf)
	}

	// apply flag setting (overrides custom configuration)
	var goexperiment, gotypesalias string
	flags := flag.NewFlagSet("", flag.PanicOnError)
	flags.StringVar(&conf.GoVersion, "lang", "", "")
	flags.StringVar(&goexperiment, "goexperiment", "", "")
	flags.BoolVar(&conf.FakeImportC, "fakeImportC", false, "")
	flags.StringVar(&gotypesalias, "gotypesalias", "", "")

// build -goexperiment arenas

// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import (
	"arena"
	"log"
	"reflect"
)

func main() {
	a := arena.NewArena()
	defer a.Free()

	const iValue = 10

	i := arena.New[int](a)
	*i = iValue

	if *i != iValue {

// errorcheck -0 -m

//go:build !goexperiment.newinliner

// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test, using compiler diagnostic flags, that the escape analysis is working.
// Compiles but does not run.  Inlining is enabled.

package foo

var p *int

func appendExperimentEnv(cmd *exec.Cmd, experiments []string) {
	if cmd.Env == nil {
		cmd.Env = cmd.Environ()
	}
	exps := strings.Join(experiments, ",")
	for _, evar := range cmd.Env {
		c := strings.SplitN(evar, "=", 2)
		if c[0] == "GOEXPERIMENT" {
			exps = c[1] + "," + exps
		}
	}
	cmd.Env = append(cmd.Env, "GOEXPERIMENT="+exps)
}

	for _, opt := range opts {
		opt(&conf)
	}

	// apply flag setting (overrides custom configuration)
	var goexperiment, gotypesalias string
	flags := flag.NewFlagSet("", flag.PanicOnError)
	flags.StringVar(&conf.GoVersion, "lang", "", "")
	flags.StringVar(&goexperiment, "goexperiment", "", "")
	flags.BoolVar(&conf.FakeImportC, "fakeImportC", false, "")
	flags.StringVar(&gotypesalias, "gotypesalias", "", "")

// errorcheck -0 -m

//go:build !gcflags_noopt && !goexperiment.newinliner

// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package foo

import "bytes"

// In order to get desired results, we need a combination of
// both escape analysis and inlining.

func bufferNotEscape() string {

// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build goexperiment.rangefunc

package race_test

import (
	"runtime"
	"sync/atomic"
	"testing"
)

type Seq2[T1, T2 any] func(yield func(T1, T2) bool)

// ofSliceIndex returns a Seq over the elements of s. It is equivalent

	fmt.Fprintf(&buf, "const defaultGOPPC64 = `%s`\n", goppc64)
	fmt.Fprintf(&buf, "const defaultGORISCV64 = `%s`\n", goriscv64)
	fmt.Fprintf(&buf, "const defaultGOEXPERIMENT = `%s`\n", goexperiment)
	fmt.Fprintf(&buf, "const defaultGO_EXTLINK_ENABLED = `%s`\n", goextlinkenabled)
	fmt.Fprintf(&buf, "const defaultGO_LDSO = `%s`\n", defaultldso)
	fmt.Fprintf(&buf, "const version = `%s`\n", findgoversion())

        GO111MODULE=""
        GOARCH="arm64"
        GOBIN="/Users/gopher/go/bin"
        GOCACHE="/Users/gopher/go/cache"
        GOENV="/Users/gopher/Library/Application Support/go/env"
        GOEXE=""
        GOEXPERIMENT=""
        GOFLAGS=""
        GOHOSTARCH="arm64"
        GOHOSTOS="darwin"
        GOINSECURE=""
        GOMODCACHE="/Users/gopher/go/pkg/mod"
        GONOPROXY=""
        GONOSUMDB=""
        GOOS="darwin"

	Setting cgocheck=1 (the default) enables relatively cheap
	checks that may miss some errors. A more complete, but slow,
	cgocheck mode can be enabled using GOEXPERIMENT (which
	requires a rebuild), see https://pkg.go.dev/internal/goexperiment for details.

	disablethp: setting disablethp=1 on Linux disables transparent huge pages for the heap.