TypeError: Cannot read properties of undefined (reading 'map')

Getting this error on the latest version:

```
TypeError: Cannot read properties of undefined (reading 'map')
at Object. (src/index.js:42:15)
```

Steps to reproduce:
1. Install latest version
2. Run the default config

Environment: Node 20.11.0, Ubuntu 22.04

Start by reproducing the failure with the latest version, the default configuration, Node 20.11.0, and Ubuntu 22.04, then inspect src/index.js at line 42 to identify which value is undefined before map is called. Done means the default configuration no longer produces this TypeError and the behavior is covered by an appropriate regression test.

Written by the indexing model from the issue text.