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error: no rules expected `"2"`
--> tests/ui/missing_comma.rs:4:21
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4 | json!({ "1": "" "2": "" });
| -^^^ no rules expected this token in macro call
| |
| help: missing comma here
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note: while trying to match `,`
--> src/macros.rs
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| ($e:expr , $($tt:tt)*) => {};
| ^
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