---
title: WarningLevel.error
framework: swift-package-manager
role: symbol
role_heading: Case
path: swift-package-manager/documentation/packagedescription/warninglevel/error
---

# WarningLevel.error

Treat as an error.

## Declaration

```swift
case error
```

## Discussion

Discussion Warnings will be elevated to errors, causing the build to fail if any such warnings occur.