@CompileStatic: can't access interface implement static field from nested closures

interface B {
	public static final CONST = "a"
}

class C implements B {
}

@groovy.transform.CompileStatic
class A {

	public static final CONST = "a"

	public static List doSomething() {
		return (0..1).collect{ int x ->
			(0..1).collect{ int y ->
				return C.CONST
			}
		}
	}
}

println A.doSomething()

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
test.groovy: 16: Access to C#CONST is forbidden @ line 16, column 12.
                                return C.CONST
              ^

1 error