1error: unexpected end of macro invocation
2 --> tests/ui/empty-ensure.rs:4:5
3  |
44 |     ensure!();
5  |     ^^^^^^^^^ missing tokens in macro arguments
6  |
7  = note: this error originates in the macro `$crate::__parse_ensure` (in Nightly builds, run with -Z macro-backtrace for more info)
8