Instances:  make(map[*ast.Ident]types.Instance),
		Scopes:     make(map[ast.Node]*types.Scope),
		Selections: make(map[*ast.SelectorExpr]*types.Selection),
	}
	versions.InitFileVersions(info)

	pkg, err := tc.Check(cfg.ImportPath, fset, files, info)
	if err != nil {
		if cfg.SucceedOnTypecheckFailure {
			// Silently succeed; let the compiler
			// report type errors.
			err = nil