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webpack3使用CopyWebpackPlugin报错

new CopyWebpackPlugin({
            patterns: [
                {
                    from: path.join(__dirname, './robots.txt'), to: path.join(__dirname, './dist')
                }
            ]
        })

报的错是,
`TypeError: Cannot read property 'thisCompilation' of undefined
`

已尝试过网上说的修改webpack版本,extract-text-webpack-plugin,都不行


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by (71.8m points)

检查copy-webpack-plugin版本与webpack版本是否匹配.
webpack 3.0匹配要降到5.0之前.

image.png

用法可能也要更改,我记得patterns是新版本加的


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