javascript: a chained route link whose path is a constant or template is labelled with the previous link's path #1732

Symptom: a chained route link whose path is not a plain string literal is labelled with the PREVIOUS link's path, under its own verb.

Repro (Express):

const PATHS = { item: '/items/:id' };
router.get('/items/all', listItems)
  .get(PATHS.item, getItem)
  .put(`/items/${':id'}`, putItem);

impact getItem → registered as a GET route "/items/all". impact putItem → registered as a PUT route "/items/all".

Expected: the verb with no path, or the constant's value. Only a link chained on router.route(p) takes its receiver's path.
Actual: a confident wrong path, which a test requesting /items/all could join to.