Breadcrumbs always empty

Breadcrumbs are based off URL path in Drupal by default. I think, lol.
Usually by path alias. It should however work with add-ons.

I've not done anything special here.
The tests in `BreadcrumbTest` should point the way.

Does your drupal node have breadcrumbs if you visit it in the backend?

It seems like it only returns breadcrumbs if the node is in my a menu, but i always want a breadcrumb not only when it's in a menu. I think it is core related, will look into it. And give an update if I find it.

Turned out te be some obscure (internal) module we had enabled that was changing how the breadcrumbs work. Disabled it and all worked. Closing the issue.