error: expected expression, found `$` --> $DIR/issue-6596-1.rs:3:9 | LL | $nonexistent | ^^^^^^^^^^^^ expected expression ... LL | e!(foo); | ------- in this macro invocation | = note: this error originates in the macro `e` (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to 1 previous error