error[E0425]: cannot find value `n` in this scope
  --> $DIR/issue-15167.rs:3:25
   |
LL | macro_rules! f { () => (n) }
   |                         ^ not found in this scope
...
LL |         println!("{}", f!());
   |                        ---- in this macro invocation

error[E0425]: cannot find value `n` in this scope
  --> $DIR/issue-15167.rs:3:25
   |
LL | macro_rules! f { () => (n) }
   |                         ^ not found in this scope
...
LL |         println!("{}", f!());
   |                        ---- in this macro invocation

error[E0425]: cannot find value `n` in this scope
  --> $DIR/issue-15167.rs:3:25
   |
LL | macro_rules! f { () => (n) }
   |                         ^ not found in this scope
...
LL |         println!("{}", f!());
   |                        ---- in this macro invocation

error[E0425]: cannot find value `n` in this scope
  --> $DIR/issue-15167.rs:3:25
   |
LL | macro_rules! f { () => (n) }
   |                         ^ not found in this scope
...
LL |         println!("{}", f!());
   |                        ---- in this macro invocation

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0425`.