bors[bot] 5671bacfa6 Merge #4139
4139: Add check for rules that no repetition which could match an empty token r=matklad a=edwin0cheng

Fix #4103

for `/ui/issues/issue-57597.rs`

This is `ParseError` of the macro rules , because it is how rustc handle it : 

https://github.com/rust-lang/rust/blob/a58b1ed44f5e06976de2bdc4d7dc81c36a96934f/src/librustc_expand/mbe/macro_rules.rs#L558


Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
2020-04-25 16:26:51 +00:00
2019-11-20 22:22:32 +03:00
2020-04-25 16:26:51 +00:00
2020-04-25 11:59:18 +02:00
2020-04-24 20:10:54 +00:00
2020-04-23 11:56:32 -04:00
2020-03-04 18:18:20 +01:00
2020-01-26 14:15:57 +01:00
2020-04-25 12:15:32 +02:00
2020-02-15 18:04:01 +01:00
2018-01-10 22:47:04 +03:00
2018-01-10 22:47:04 +03:00
2020-03-05 17:26:47 +01:00
2019-11-02 22:19:59 +03:00

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