// This is ok; lazy type set computation will determine the actual type set
			// in normal form.
			return &Union{terms}
		}

	case *Interface:
		methods, mcopied := subst.funcList(t.methods)
		embeddeds, ecopied := subst.typeList(t.embeddeds)
		if mcopied || ecopied {
			iface := subst.check.newInterface()
			iface.embeddeds = embeddeds
			iface.embedPos = t.embedPos

			// This is ok; lazy type set computation will determine the actual type set
			// in normal form.
			return &Union{terms}
		}

	case *Interface:
		methods, mcopied := subst.funcList(t.methods)
		embeddeds, ecopied := subst.typeList(t.embeddeds)
		if mcopied || ecopied {
			iface := subst.check.newInterface()
			iface.embeddeds = embeddeds
			iface.embedPos = t.embedPos

//
// There are two modes of operation:
//
//  1. If infer == true, funcInst infers missing type arguments as needed and
//     instantiates the function x. The returned results are nil.
//
//  2. If infer == false and inst provides all type arguments, funcInst
//     instantiates the function x. The returned results are nil.
//     If inst doesn't provide enough type arguments, funcInst returns the

//
// There are two modes of operation:
//
//  1. If infer == true, funcInst infers missing type arguments as needed and
//     instantiates the function x. The returned results are nil.
//
//  2. If infer == false and inst provides all type arguments, funcInst
//     instantiates the function x. The returned results are nil.
//     If inst doesn't provide enough type arguments, funcInst returns the

		(*ast.FuncDecl)(nil),
		(*ast.FuncLit)(nil),
		(*ast.GenDecl)(nil),
		(*ast.RangeStmt)(nil),
		(*ast.ReturnStmt)(nil),
	}
	inspect.Preorder(nodeFilter, func(node ast.Node) {
		switch node := node.(type) {
		case *ast.RangeStmt:
			checkCopyLocksRange(pass, node)
		case *ast.FuncDecl:
			checkCopyLocksFunc(pass, node.Name.Name, node.Recv, node.Type)
		case *ast.FuncLit:
			checkCopyLocksFunc(pass, "func", nil, node.Type)

	ri := make(map[*syntax.FuncLit]bool)
	for _, file := range files {
		syntax.Inspect(file, func(n syntax.Node) bool {
			switch n := n.(type) {
			case *syntax.FuncDecl:
				sig, _ := info.Defs[n.Name].Type().(*types2.Signature)
				rewriteFunc(pkg, info, n.Type, n.Body, sig, ri)
				return false
			case *syntax.FuncLit:
				sig, _ := info.Types[n].Type.(*types2.Signature)

		Value    string      // literal string; e.g. 42, 0x7f, 3.14, 1e-9, 2.4i, 'a', '\x7f', "foo" or `\m\n\o`
	}

	// A FuncLit node represents a function literal.
	FuncLit struct {
		Type *FuncType  // function type
		Body *BlockStmt // function body
	}

	// A CompositeLit node represents a composite literal.
	CompositeLit struct {

}

// litStmts returns all statements from the function body of a function
// literal.
//
// If fun is not a function literal, it returns nil.
func litStmts(fun ast.Expr) []ast.Stmt {
	lit, _ := fun.(*ast.FuncLit)
	if lit == nil {
		return nil
	}
	return lit.Body.List
}

// goInvoke returns a function expression that would be called asynchronously

		}
		if n.Type.Results != nil {
			children = append(children, n.Type.Results)
		}
		if n.Body != nil {
			children = append(children, n.Body)
		}

	case *ast.FuncLit:
		// nop

	case *ast.FuncType:
		if n.Func != 0 {
			children = append(children,
				tok(n.Func, len("func")))
		}

	case *ast.GenDecl:
		children = append(children,

	// the curfn stack.
	var curfn []*ast.FuncType

	before := func(n any) {
		// push function type on stack
		switch n := n.(type) {
		case *ast.FuncDecl:
			curfn = append(curfn, n.Type)
		case *ast.FuncLit:
			curfn = append(curfn, n.Type)
		}
	}

	// After is the real type checker.
	after := func(n any) {
		if n == nil {
			return
		}