src := "package x; import `unsafe`; var _ unsafe.Pointer;\n" + body

	var buf strings.Builder
	conf := types.Config{
		Error:    func(err error) { fmt.Fprintln(&buf, err) },
		Importer: importer.Default(),
	}
	typecheck(src, &conf, nil)
	if buf.Len() == 0 {
		return nil
	}
	return errors.New(strings.TrimRight(buf.String(), "\n"))
}

func TestMonoGood(t *testing.T) {
	for i, good := range goods {

// license that can be found in the LICENSE file.

package test

import (
	"bufio"
	"cmd/compile/internal/abi"
	"cmd/compile/internal/base"
	"cmd/compile/internal/ssagen"
	"cmd/compile/internal/typecheck"
	"cmd/compile/internal/types"
	"cmd/internal/obj"
	"cmd/internal/obj/x86"
	"cmd/internal/src"
	"fmt"
	"os"
	"testing"
)

// AMD64 registers available:

	tests = append(tests, independentTestTypes...)
	tests = append(tests, dependentTestTypes...)

	for _, test := range tests {
		src := `package p; import "io"; type _ io.Writer; type T ` + test.src
		pkg, err := typecheck(src, nil, nil)
		if err != nil {
			t.Errorf("%s: %s", src, err)
			continue
		}
		obj := pkg.Scope().Lookup("T")
		if obj == nil {
			t.Errorf("%s: T not found", test.src)
			continue
		}

}

// typefix replaces nil with 0 for all nils whose type, when passed to badType, returns true.
func typefix(f *ast.File, badType func(string) bool) bool {
	if !imports(f, "C") {
		return false
	}
	typeof, _ := typecheck(&TypeConfig{}, f)
	changed := false

	// step 1: Find all the nils with the offending types.
	// Compute their replacement.
	badNils := map[any]ast.Expr{}
	walk(f, func(n any) {

	tests = append(tests, independentTestTypes...)
	tests = append(tests, dependentTestTypes...)

	for _, test := range tests {
		src := `package generic_p; import "io"; type _ io.Writer; type T ` + test.src
		pkg, err := typecheck(src, nil, nil)
		if err != nil {
			t.Errorf("%s: %s", src, err)
			continue
		}
		obj := pkg.Scope().Lookup("T")
		if obj == nil {
			t.Errorf("%s: T not found", test.src)
			continue
		}

// Copyright 2009 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 typecheck

import (
	"cmd/compile/internal/base"
	"cmd/compile/internal/ir"
	"cmd/compile/internal/types"
	"cmd/internal/obj"
)

// LookupRuntime returns a function or variable declared in
// _builtin/runtime.go. If types_ is non-empty, successive occurrences

// Third-party tools are not expected to depend on these details and
// they're expected to change much more rapidly, so they're omitted
// here. See exportWriter's varExt/funcExt/etc methods for details.

package typecheck

import (
	"strings"
)

const blankMarker = "$"

// TparamName returns the real name of a type parameter, after stripping its

	for i, test := range testObjects {
		t.Run(fmt.Sprint(i), func(t *testing.T) {
			src := "package p; " + test.src
			conf := Config{Error: func(error) {}, Importer: defaultImporter(), EnableAlias: test.alias}
			pkg, err := typecheck(src, &conf, nil)
			if err != nil {
				t.Fatalf("%s: %s", src, err)
			}

			names := strings.Split(test.obj, ".")
			if len(names) != 1 && len(names) != 2 {

	"os"
	"path/filepath"
	"runtime"
	"strconv"
	"strings"
	"unicode"
	"unicode/utf8"

	"cmd/compile/internal/base"
	"cmd/compile/internal/ir"
	"cmd/compile/internal/syntax"
	"cmd/compile/internal/typecheck"
	"cmd/compile/internal/types"
	"cmd/internal/objabi"
)

func LoadPackage(filenames []string) {
	base.Timer.Start("fe", "parse")

	// Limit the number of simultaneously open files.

	for i, test := range testObjects {
		t.Run(fmt.Sprint(i), func(t *testing.T) {
			if test.alias {
				t.Setenv("GODEBUG", "gotypesalias=1")
			}

			src := "package p; " + test.src
			pkg, err := typecheck(src, nil, nil)
			if err != nil {
				t.Fatalf("%s: %s", src, err)
			}

			names := strings.Split(test.obj, ".")
			if len(names) != 1 && len(names) != 2 {