Fix TypeError error "Cannot destructure property..." in custom-property-pattern

[jeddy3]

What steps are needed to reproduce the bug?

a { prop: var(); }

Demo

This is a regression affecting everyone using the standard config.

What Stylelint configuration is needed to reproduce the bug?

{
  "rules": {
    "custom-property-pattern": [
      "^([a-z][a-z0-9]*)(-[a-z0-9]+)*$",
      {
        "message": "Expected custom property name to be kebab-case"
      }
    ]
  }
}

How did you run Stylelint?

Demo

Which version of Stylelint are you using?

14.6.0

What did you expect to happen?

No TypeError

What actually happened?

TypeError

Does the bug relate to non-standard syntax?

No

Proposal to fix the bug

Check that nodes is available before destructuring.

Follow-up PR to add "empty functions" to commonly overlooked edge cases.

[mattxwang]

Submitted a quick fix, though I check if nodes[0] exists rather than nodes (checking for nodes doesn't resolve the problem). Let me know what you think!