> For the complete documentation index, see [llms.txt](https://docs.aurelia.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aurelia.io/developer-guides/error-messages/0151-to-0179/aur0176.md).

# AUR0176

## Error Message

`AUR0176: Expression error: rest parameter must be last formal parameter in arrow function: "{{expression}}"`

## Description

This error occurs when an arrow function uses a rest parameter (`...args`) that is not the last parameter.

## Example Trigger

```html
<!-- ❌ Rest not last -->
<div textcontent.bind="(a, ...rest, b) => a"></div>
```

## Solution

* Put the rest parameter last, or avoid arrow functions in bindings.


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