infoEnd, _   = hex.DecodeString("f932433186182072008242104116d8f2")
)

func isStandardImportPath(path string) bool {
	return findStandardImportPath(path) != ""
}

func findStandardImportPath(path string) string {
	if path == "" {
		panic("findStandardImportPath called with empty path")
	}
	if search.IsStandardImportPath(path) {
		if modindex.IsStandardPackage(cfg.GOROOT, cfg.BuildContext.Compiler, path) {

			if strings.HasPrefix(elem, ".") || strings.HasPrefix(elem, "_") || elem == "testdata" {
				want = false
			}

			name := filepath.ToSlash(path[len(src):])
			if m.pattern == "std" && (!IsStandardImportPath(name) || name == "cmd") {
				// The name "std" is only the standard library.
				// If the name is cmd, it's the root of the command tree.
				want = false
			}
			if !treeCanMatch(name) {
				want = false

	}

	// Check each module on the build list.
	var dirs, roots []string
	var mods []module.Version

	// Is the package in the standard library?
	pathIsStd := search.IsStandardImportPath(path)
	if pathIsStd && modindex.IsStandardPackage(cfg.GOROOT, cfg.BuildContext.Compiler, path) {
		for _, mainModule := range MainModules.Versions() {
			if MainModules.InGorootSrc(mainModule) {

	p.Doc = pp.Doc
	p.Root = pp.Root
	p.ConflictDir = pp.ConflictDir
	p.BinaryOnly = pp.BinaryOnly

	// TODO? Target
	p.Goroot = pp.Goroot
	p.Standard = p.Goroot && p.ImportPath != "" && search.IsStandardImportPath(p.ImportPath)
	p.GoFiles = pp.GoFiles
	p.CgoFiles = pp.CgoFiles
	p.IgnoredGoFiles = pp.IgnoredGoFiles
	p.InvalidGoFiles = pp.InvalidGoFiles
	p.IgnoredOtherFiles = pp.IgnoredOtherFiles
	p.CFiles = pp.CFiles

		ld.applyPkgFlags(ctx, pkg, pkgInAll)
	}
	if ld.AllowPackage != nil {
		if err := ld.AllowPackage(ctx, pkg.path, pkg.mod); err != nil {
			pkg.err = err
		}
	}

	pkg.inStd = (search.IsStandardImportPath(pkg.path) && search.InDir(pkg.dir, cfg.GOROOTsrc) != "")

	var imports, testImports []string

	if cfg.BuildContext.Compiler == "gccgo" && pkg.inStd {
		// We can't scan standard packages for gccgo.

			panic(fmt.Sprintf("internal error: queryPath called with pattern %q", q.pattern))
		}
		if q.version == "none" {
			panic(`internal error: queryPath called with version "none"`)
		}

		if search.IsStandardImportPath(q.pattern) {
			stdOnly := module.Version{}
			packages, _ := r.matchInModule(ctx, q.pattern, stdOnly)
			if len(packages) > 0 {
				if q.rawVersion != "" {