Some selectors from tailwindcss kills csso parser with error "Unexpected input"

[Semdevmaster]

Example selector: .sm\:focus-within\:text-opacity-5:focus-within{} Get in the console: SyntaxError: Unexpected input at Object.error (.........\node_modules\css-tree\lib\parser\create.js:240:19) Try this selector in https://hugogiraudel.github.io/selectors-explained/ no error Is this a parser problem or is it really selector problem?

[Semdevmaster]

I tested this selector on pure css and it is fully valid. Apparently the problem is in the parser.

[lahmatiy]

Which version of CSSO do you use? Can't reproduce in the latest version:

[Semdevmaster]

Describe the problem: Example selector: .sm:focus-within:text-opacity-5:focus-within{} Get in the console: SyntaxError: Unexpected input at Object.error (.........\node_modules\css-tree\lib\parser\create.js:240:19)

Link to a minimal reproduction: 1)default config tailwindcss (use only utilities) 2)add postcss plugin "postcss-csso" in postcss.config.js 3)get above error in console