defer func() {
		allowMissingModuleImports = oldAllowMissingModuleImports
		RootMode = oldRootMode
	}()
	allowMissingModuleImports = true
	RootMode = NoRoot

	ctx := context.Background()
	rs := LoadModFile(ctx)

	for _, tt := range importTests {
		t.Run(strings.ReplaceAll(tt.path, "/", "_"), func(t *testing.T) {
			// Note that there is no build list, so Import should always fail.
			m, err := queryImport(ctx, tt.path, rs)

//
// As a side-effect, LoadModFile may change cfg.BuildMod to "vendor" if
// -mod wasn't set explicitly and automatic vendoring should be enabled.
//
// If LoadModFile or CreateModFile has already been called, LoadModFile returns
// the existing in-memory requirements (rather than re-reading them from disk).
//
// LoadModFile checks the roots of the module graph for consistency with each

	if isStandardImportPath(pkgpath) || !Enabled() {
		return nil
	}
	m, ok := findModule(loaded, pkgpath)
	if !ok {
		return nil
	}

	rs := LoadModFile(ctx)
	return moduleInfo(ctx, rs, m, 0, nil)
}

// PackageModRoot returns the module root directory for the module that provides
// a given package. If modules are not enabled or if the package is in the

	match := search.NewMatch(pattern)
	if m == (module.Version{}) {
		matchPackages(ctx, match, tags, includeStd, nil)
	}

	LoadModFile(ctx) // Sets Target, needed by fetch and matchPackages.

	if !match.IsLiteral() {
		matchPackages(ctx, match, tags, omitStd, []module.Version{m})
		return match
	}

	root, isLocal, err := fetch(ctx, m)

			reuse[module.Version{Path: m.Path, Version: m.Version}] = &m
			if m.Query != "" {
				reuse[module.Version{Path: m.Path, Version: m.Query}] = &m
			}
		}
	}

	rs, mods, err := listModules(ctx, LoadModFile(ctx), args, mode, reuse)

	type token struct{}
	sem := make(chan token, runtime.GOMAXPROCS(0))
	if mode != 0 {
		for _, m := range mods {
			if m.Reuse {
				continue
			}

// requirements is the requirement graph for the main module.
//
// It is always non-nil if the main module's go.mod file has been loaded.
//
// This variable should only be read from the loadModFile function, and should
// only be written in the loadModFile and commitRequirements functions.
// All other functions that need or produce a *Requirements should
// accept and/or return an explicit parameter.
var requirements *Requirements

	modload.ForceUseModules = true
	modload.ExplicitWriteGoMod = true
	haveExplicitArgs := len(args) > 0

	if modload.HasModRoot() || modload.WorkFilePath() != "" {
		modload.LoadModFile(ctx) // to fill MainModules

		if haveExplicitArgs {
			for _, mainModule := range modload.MainModules.Versions() {
				targetAtUpgrade := mainModule.Path + "@upgrade"
				targetAtPatch := mainModule.Path + "@patch"

				}

			default:
				panic(fmt.Sprintf("internal error: modload missing case for pattern %s", m.Pattern()))
			}
		}
	}

	initialRS, err := loadModFile(ctx, &opts)
	if err != nil {
		base.Fatal(err)
	}

	ld := loadFromRoots(ctx, loaderParams{
		PackageOpts:  opts,
		requirements: initialRS,

		allPatternIsRoot: allPatternIsRoot,

		if *listTest {
			base.Fatalf("go list -test cannot be used with -m")
		}

		if modload.Init(); !modload.Enabled() {
			base.Fatalf("go: list -m cannot be used with GO111MODULE=off")
		}

		modload.LoadModFile(ctx) // Sets cfg.BuildMod as a side-effect.
		if cfg.BuildMod == "vendor" {
			const actionDisabledFormat = "go: can't %s using the vendor directory\n\t(Use -mod=mod or -mod=readonly to bypass.)"

			if *listVersions {

			}
		}
		for _, match := range matches {
			for _, pkg := range match.Pkgs {
				m := modload.PackageModule(pkg)
				relevantMods[m] |= named
			}
		}
	}

	reqs := modload.LoadModFile(ctx)
	for m := range relevantMods {
		if reqs.IsDirect(m.Path) {
			relevantMods[m] |= direct
		}
	}

	// Load retractions for modules mentioned on the command line and modules