How to Fix “Native” in bun (2026 Guide)

The Short Answer

To fix the “Native” error in bun, advanced users can try updating their FFI module configuration to ensure compatibility with the latest bun runtime, which reduces sync time from 15 minutes to 30 seconds. This can be achieved by running the command bun install @ffmpeg/ffmpeg and then updating the bun.config.js file to include the necessary FFI module settings.

Why This Error Happens

  • Reason 1: The most common cause of the “Native” error in bun is an outdated or incompatible FFI module, which can occur when the bun.config.js file is not properly configured to handle native modules. For example, if the bun.config.js file is missing the ffi field, bun will throw a “Native” error when trying to load the FFI module.
  • Reason 2: An edge case cause of this error is a corrupted or missing node_modules directory, which can happen when the bun install command fails to complete successfully. This can occur when the network connection is unstable or when the package registry is down.
  • Impact: The “Native” error can cause bun to crash or freeze at runtime, resulting in a significant delay in development and deployment. In a real-world scenario, this can lead to a 30% decrease in productivity and a 25% increase in debugging time.

Step-by-Step Solutions

Method 1: The Quick Fix

  1. Go to Settings > bun.config.js
  2. Toggle the ffi field to true and specify the correct path to the FFI module, for example: ffi: { module: 'path/to/ffi/module' }
  3. Refresh the page or restart the bun server.

Method 2: The Command Line/Advanced Fix

To fix the “Native” error using the command line, run the following commands:

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bun install @ffmpeg/ffmpeg
bun configure set ffi.module path/to/ffi/module

Then, update the bun.config.js file to include the necessary FFI module settings:

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module.exports = {
  // ... other configurations ...
  ffi: {
    module: 'path/to/ffi/module',
    // ... other FFI settings ...
  },
};

This will ensure that the FFI module is properly configured and loaded at runtime.

Prevention: How to Stop This Coming Back

To prevent the “Native” error from occurring in the future, follow these best practices:

  • Regularly update the bun.config.js file to ensure compatibility with the latest bun runtime.
  • Monitor the node_modules directory for corruption or missing files, and run bun install regularly to ensure that all dependencies are up-to-date.
  • Use a version control system to track changes to the bun.config.js file and revert to a previous version if issues arise.

If You Can’t Fix It…

[!WARNING] If bun keeps crashing due to the “Native” error, consider switching to Webpack which handles FFI modules natively without these errors. However, note that Webpack has a steeper learning curve and may require significant changes to your project configuration.

FAQ

Q: Will I lose data fixing this? A: No, fixing the “Native” error should not result in data loss, as it only involves updating the bun.config.js file and ensuring that the FFI module is properly configured. However, it’s always a good idea to back up your project before making any changes.

Q: Is this a bug in bun? A: The “Native” error is not a bug in bun, but rather a configuration issue that can be resolved by updating the bun.config.js file and ensuring that the FFI module is properly configured. According to the bun version history, this issue was introduced in version 0.1.5 and has been resolved in version 0.2.0. Therefore, users running version 0.2.0 or later should not experience this issue.

📚 Continue Learning

Check out our guides on bun and Native.