Composer returning mysterious error

Unfortunately, I do not know exactly what I did that caused this error to begin showing up whenever I run

composer update

from the command line. I believe it happened after adding laracasts/integrated to my composer.json, but have a hard time believing that's the issue. I did try removing laracasts/integrated and the problem remained. Here's the exact error I get:

$ composer update
> php artisan clear-compiled

  [ErrorException]
  Undefined index: REQUEST_URI

Script php artisan clear-compiled handling the pre-update-cmd event returned with an error

  [RuntimeException]
  Error Output:

update [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--lock] [--no-plugins] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [--with-dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--] [<packages>]...

After googling around, it appeared that perhaps deleting the composer.lock file and running

 composer install 

might fix the problem, but that did not work for me. I found a myriad of similar questions, but none that fit the exact error I was getting, so I was hoping someone with a lot of familiarity with these types of errors can help me debug it.

From what I can tell,

 php artisan clear-compiled

is causing this error, but again, I'm really unfamiliar with how to go about debugging this type of problem.

Thanks.

via Chebli Mohamed