[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Task](https://evolu.dev/docs/api-reference/common/Task) › InferTaskErr

```ts
type InferTaskErr<R> = R extends Task<any, infer E, any> ? E : never;
```

Defined in: [packages/common/src/Task.ts:478](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Task.ts#L478)

Extracts the error type from a [Task](https://evolu.dev/docs/api-reference/common/Task/type-aliases/Task).