1error: unexpected end of macro invocation
2 --> tests/ui/empty-ensure.rs:4:5
3  |
44 |     ensure!();
5  |     ^^^^^^^^^ missing tokens in macro arguments
6  |
7note: while trying to match meta-variable `$cond:expr`
8 --> src/ensure.rs
9  |
10  |     ($cond:expr $(,)?) => {
11  |      ^^^^^^^^^^
12  = note: this error originates in the macro `$crate::__parse_ensure` which comes from the expansion of the macro `ensure` (in Nightly builds, run with -Z macro-backtrace for more info)
13