Width set with calc cut off in width style color shorthand properties

[yggg]

Environment

• clean-css version - 4.2.1:
• node.js version - 10.13.0:
• operating system: macOS 10.14

Configuration options

var CleanCSS = require('clean-css');
new CleanCSS({
  level: {
    2: { all: false },
  },
})

Input CSS

.width-style-color-props {
  border: calc(1px) solid blue;
  outline: calc(1px) solid blue;
}

Actual output CSS

.width-style-color-props {
  border: solid #00f;
  outline: #00f solid;
}

Expected output CSS

.width-style-color-props {
  border: calc(1px) solid #00f;
  outline: calc(1px) solid #00f;
}

_widthFilter which is used by widthStyleColor function to get width part, excludes calc with !validator.isDynamicUnit(value[1]) statement, for some reason.
https://github.com/jakubpawlowicz/clean-css/blob/887ac0e2d1f10e16663edf0719153f18597824d5/lib/optimizer/level-2/break-up.js#L61
Is it intentional? I believe it's a valid css since calc can be used wherever length values are allowed.

[jakubpawlowicz]

You were right @yggg, sorry it took me so long to fix it.