| 1 | # Errors & warnings
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| 2 |
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| 3 | In addition to rule violations, stylelint surfaces the following errors and warnings:
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| 4 |
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| 5 | ## CSS syntax error
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| 6 |
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| 7 | The chosen [PostCSS syntax](../about/syntaxes.md) was unable to parse the source.
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| 8 |
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| 9 | ## Parse error
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| 10 |
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| 11 | The chosen [PostCSS syntax](../about/syntaxes.md) successfully parsed, but one of the construct-specific parsers failed to parse either a media query, selector or value within that source.
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| 12 |
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| 13 | The construct-specific parsers are:
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| 14 |
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| 15 | - `postcss-media-query-parser`
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| 16 | - `postcss-selector-parser`
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| 17 | - `postcss-value-parser`
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| 18 |
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| 19 | ## Unknown rule error
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| 20 |
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| 21 | There is an unknown rule in the [configuration object](configure.md).
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| 22 |
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| 23 | ## Deprecation warning
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| 24 |
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| 25 | There is a deprecated rule in the [configuration object](configure.md).
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| 26 |
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| 27 | ## Invalid option warning
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| 28 |
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| 29 | There is a misconfigured rule in the [configuration object](configure.md).
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