Static import of method with default parameter value: MissingMethodException

A static method with a default parameter is not found, when it is imported statically and called without prefixing his class:

=== test.groovy ===

import static Settings.*
import static ConsoleUI.*

class Settings
{
static void initialize()

}

class ConsoleUI
{
static void writeln(String s, int delay = 0)

}

Settings.initialize()

=== Output ===

working
Caught: groovy.lang.MissingMethodException: No signature of method: static Settings.writeln() is applicable for argument types: (java.lang.String) values:

at Settings.initialize(test.groovy:8)
at test.run(test.groovy:20)
at test.main(test.groovy)

Exited: 256