# io.github.libtmux.scaladsl.cats.LiveServer.failure

- **Module:** io.github.libtmux.scaladsl.cats
- **Package:** io.github.libtmux:libtmux-scala_3
- **Language:** Scala
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-java/blob/f56392b5d9bc7f1f9c1631842333fb90f3d82d40/libtmux-scala-cats/src/main/scala/io/github/libtmux/scaladsl/cats/LiveServer.scala#L25
- **Page:** https://libtmux.org/en/scala/latest/reference/io-github-libtmux-scaladsl-cats-liveserver-failure/

```
def failure(implicit F: _root_.cats.Functor[F]): F[Option[Throwable]]
```

`None` while still live; `Some(cause)` once the background poller has died. Never blocks.

## Parameters

- `F` (`_root_.cats.Functor[F]`)