---
title: Failure
framework: combine
role: symbol
role_heading: Associated Type
path: combine/subscriber/failure
---

# Failure

The kind of errors this subscriber might receive.

## Declaration

```swift
associatedtype Failure : Error
```

## Discussion

Discussion Use Never if this Subscriber cannot receive errors.

## See Also

### Declaring supporting types

- [Input](combine/subscriber/input.md)