error[E0425]: unresolved value `fake`
  --> $DIR/macro-backtrace-nested.rs:15:12
   |
15 |     () => (fake)
   |            ^^^^ no resolution found
...
27 |     1 + call_nested_expr!();
   |         ------------------- in this macro invocation

error[E0425]: unresolved value `fake`
  --> $DIR/macro-backtrace-nested.rs:15:12
   |
15 |     () => (fake)
   |            ^^^^ no resolution found
...
28 |     call_nested_expr_sum!();
   |     ------------------------ in this macro invocation

error: aborting due to 2 previous errors