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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