tailwind-gradient bug reproduction

For https://github.com/tailwindlabs/tailwindcss/issues/16037

Running the reproduction

nvm use 22
npm i
npm run build:css # to generate styles.css
python -m http.server -d . # to serve files

Details of the error

Inside the generated styles.css, grep for from-blue-500 (I've formatted below for clarity):

  .from-blue-500 {
    --tw-gradient-from: var(--color-blue-500);
    --tw-gradient-stops: var(
      --tw-gradient-via-stops,
      var(--tw-gradient-position,) /* missing comma after closing paren */
      var(--tw-gradient-from) var(--tw-gradient-from-position),
      var(--tw-gradient-to) var(--tw-gradient-to-position)
    );
  }

- var(--tw-gradient-position,)
+ var(--tw-gradient-position),

Screenshots

As-generated css	Manually-modified css