Failed to introduce macro with ellipsis from inside other macro

Created by: andreypopp

I see the following error

SyntaxError: [patterns] The pattern variable is not bound for the template
12:                 rule { { $stmt ... } } => {

when trying to declare macro

macro outer {
    case { $name } => {
        return #{
            macro ok { // this works!
                rule { $id } => { $id(true) }
            }

            macro fail { // this doesn't work!
                rule { { $stmt ... } } => {
                    function x() {
                        $stmt ...
                    }
                }
            }
        }
    }
}

outer