1error: unexpected end of macro invocation 2 --> tests/ui/missing_value.rs:4:5 3 | 44 | json!({ "a" : }); 5 | ^^^^^^^^^^^^^^^^ missing tokens in macro arguments 6 | 7note: while trying to match `@` 8 --> src/macros.rs 9 | 10 | (@array [$($elems:expr,)*]) => { 11 | ^ 12 = note: this error originates in the macro `json_internal` which comes from the expansion of the macro `json` (in Nightly builds, run with -Z macro-backtrace for more info) 13