Script php artisan package:discover handling the post-autoload-dump event returned with error code -1073740791

Why is it throwing an error? What can I do to debug the issue?

Composer version 1.7.2 2018-08-16 16:57:12 Running on Windows 10.

I can run php artisan package:discover manually without issue. I'm not sure what the number at the end means. I ran this with composer update -vvv

Writing lock file
Generating optimized autoload files
> post-autoload-dump: Illuminate\Foundation\ComposerScripts::postAutoloadDump
> post-autoload-dump: php artisan package:discover
Executing command (CWD): php artisan package:discover
Script php artisan package:discover handling the post-autoload-dump event returned with error code -1073740791

via Chebli Mohamed