Error: method is not a base

[yglukhov]

type A = ref object of RootObj
type B = ref object of RootObj
type C = object # change to int to make it compile and work as expected

method foo(a: A, c: C) {.base.} = echo "a"
method foo(b: B, c: C) {.base.} = echo "b"

var a = A.new()
var b = B.new()
var c: C

a.foo(c)
b.foo(c)

test.nim(8, 8) Error: method is not a base