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rust/src/test/ui/parser/lex-stray-backslash.rs

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Improve char escaping in lexer messages Currently ', " and \ are escaped as \', \" and \\ respectively. This leads to confusing messages such as `error: unknown start of token: \\` when encountering a single backslash. Fix by emitting printable ASCII characters directly. This will still escape \r, \n, \t and Unicode characters. Fixes #47902
2018-01-31 15:15:38 -06:00
\ //~ ERROR: unknown start of token: \
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