# rethrow

**Kind:** Function

**Source:** [`packages/core/helpers/rethrow.ts`](https://github.com/nestjs/nest/blob/master/packages/core/helpers/rethrow.ts#L1)

**Part of:** [Core](subsystem-packages-core)

## Signature

```ts
function rethrow(err: unknown)
```

## Parameters

| Name | Type |
|---|---|
| `err` | `unknown` |