---
title: Publishers.Concatenate.Failure
framework: combine
role: symbol
role_heading: Type Alias
path: combine/publishers/concatenate/failure
---

# Publishers.Concatenate.Failure

The kind of errors this publisher might publish.

## Declaration

```swift
typealias Failure = Suffix.Failure
```

## Discussion

Discussion This publisher uses its source publishers’ failure type.

## See Also

### Declaring supporting types

- [Publishers.Concatenate.Output](combine/publishers/concatenate/output.md)