# Catacomb package The **`catacomb`** package is a subpackage in the Go `worker` library that leverages [the tomb package](https://documentation.ubuntu.com/juju/3.6/contributor/reference/tomb-package.md#tomb-package) to bind the lifetimes of, and track the errors of, a group of related workers. In Juju it is used in precisely this way. > See more: [Go packages | `worker` > `catacomb`](https://pkg.go.dev/github.com/juju/worker/v3@v3.3.0/catacomb)