/src/test/compile-fail/macro-2.rs

 1//error-pattern:is an expr, expected an identifier
 2fn main() {
 3    #macro[[#mylambda[x, body],
 4            {
 5                fn f(x: int) -> int { return body }
 6                f
 7            }]];
 8
 9    assert (mylambda!{y * 1, y * 2}(8) == 16);
10}