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# init(upstream:handler:)

Creates a publisher that handles errors from an upstream publisher by replacing the failed publisher with another publisher or by throwing an error.

```
init(upstream: Upstream, handler: @escaping (Upstream.Failure) throws -> NewPublisher)
```

## Parameters

`upstream`

The publisher from which this publisher receives its elements.

`handler`

A closure that accepts the upstream failure as input and either returns a publisher to replace the upstream publisher. If this closure throws an error, the publisher terminates with the thrown error.

---

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