id, _ := x.(*ast.Ident)
		return id
	case *ast.Ident:
		return fun
	default:
		return nil
	}
}

// funcLitInScope returns a FuncLit that id is at least initially assigned to.
//
// TODO: This is closely tied to id.Obj which is deprecated.
func funcLitInScope(id *ast.Ident) *ast.FuncLit {
	// Compare to (*ast.Object).Pos().
	if id.Obj == nil {
		return nil
	}
	var rhs ast.Expr
	switch d := id.Obj.Decl.(type) {

	nodeTypes := []ast.Node{
		(*ast.FuncLit)(nil),
		(*ast.FuncDecl)(nil),
	}
	inspect.Preorder(nodeTypes, func(n ast.Node) {
		runFunc(pass, n)
	})
	return nil, nil
}

func runFunc(pass *analysis.Pass, node ast.Node) {
	// Find scope of function node
	var funcScope *types.Scope
	switch v := node.(type) {
	case *ast.FuncLit:
		funcScope = pass.TypesInfo.Scopes[v.Type]
	case *ast.FuncDecl:

		// case *BadExpr:
		// case *Name:
		// case *BasicLit:
		case *CompositeLit:
			if n.Type != nil {
				m = n.Type
				continue
			}
			return n.Pos()
		case *KeyValueExpr:
			m = n.Key
		// case *FuncLit:
		// case *ParenExpr:
		case *SelectorExpr:
			m = n.X
		case *IndexExpr:
			m = n.X
		// case *SliceExpr:
		case *AssertExpr:
			m = n.X
		case *TypeSwitchGuard:
			if n.Lhs != nil {
				m = n.Lhs

					forbidden := formatMethod(sel, fn) // e.g. "(*testing.T).Forbidden

					var context string
					var where analysis.Range = e.async // Put the report at the go fun() or t.Run(name, fun).
					if _, local := e.fun.(*ast.FuncLit); local {
						where = call // Put the report at the t.Forbidden() call.
					} else if id, ok := e.fun.(*ast.Ident); ok {
						context = fmt.Sprintf(" (%s calls %s)", id.Name, forbidden)
					}

		buf.WriteString(x.Name)

	case *ast.Ellipsis:
		buf.WriteString("...")
		if x.Elt != nil {
			WriteExpr(buf, x.Elt)
		}

	case *ast.BasicLit:
		buf.WriteString(x.Value)

	case *ast.FuncLit:
		buf.WriteByte('(')
		WriteExpr(buf, x.Type)
		buf.WriteString(" literal)") // shortened

	case *ast.CompositeLit:
		WriteExpr(buf, x.Type)
		buf.WriteByte('{')
		if len(x.Elts) > 0 {
			buf.WriteString("…")

		}

	case *FieldList:
		walkList(v, n.List)

	// Expressions
	case *BadExpr, *Ident, *BasicLit:
		// nothing to do

	case *Ellipsis:
		if n.Elt != nil {
			Walk(v, n.Elt)
		}

	case *FuncLit:
		Walk(v, n.Type)
		Walk(v, n.Body)

	case *CompositeLit:
		if n.Type != nil {
			Walk(v, n.Type)
		}
		walkList(v, n.Elts)

	case *ParenExpr:
		Walk(v, n.X)

	case *SelectorExpr: