url: URLPattern.exec() does not preserve capture group declaration order

Version

latest main branch

Platform

7.1.4-arch1-1

Subsystem

url

What steps will reproduce the bug?

  const assert = require('node:assert');
  const { URLPattern } = require('node:url');

  const pattern = new URLPattern({
    pathname: '/:one/:two/:three',
  });

  const result = pattern.exec('https://example.com/a/b/c');

  console.log(Object.entries(result.pathname.groups));

How often does it reproduce? Is there a required condition?

Every

What is the expected behavior? Why is that the expected behavior?

  [
    ['one', 'a'],
    ['two', 'b'],
    ['three', 'c'],
  ]

URLPattern.exec() may expose named capture groups in an order different from their declaration order.

The captured values remain accessible by name, but the incorrect property insertion order is observable through Object.keys(), Object.values(), Object.entries(), object spread, and JSON serialization.

What do you see instead?

  [
    ['three', 'c'],
    ['two', 'b'],
    ['one', 'a'],
  ]

Additional information

No response

Comienza ejecutando la reproducción con URLPattern.exec() de node:url e inspecciona el objeto pathname.groups resultante. Rastrea la implementación de URLPattern y sus pruebas para identificar cómo se insertan los grupos con nombre; se considera terminado cuando los grupos aparecen en el orden de declaración y siguen siendo accesibles por nombre, con cobertura de regresión para el ejemplo.