PHP Fatal error: Uncaught Error: Class 'drupol\phposinfo\OsInfo' not found

[mikemadison13]

Describe the bug
After updating to BLT 13.x, BLT update runs and fails with the following:

PHP Fatal error:  Uncaught Error: Class 'drupol\phposinfo\OsInfo' not found

To Reproduce
Steps to reproduce the behavior, ideally starting from a fresh install of BLT:

1. update composer.json to ^13 for BLT
2. Run composer update acquia/blt --with-all-dependences

Expected behavior
BLT update runs successfully

Detailed error output

blt update
PHP Fatal error:  Uncaught Error: Class 'drupol\phposinfo\OsInfo' not found in /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Common/EnvironmentDetector.php:157
Stack trace:
#0 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Common/EnvironmentDetector.php(171): Acquia\Blt\Robo\Common\EnvironmentDetector::getPlatform()
#1 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Blt.php(116): Acquia\Blt\Robo\Common\EnvironmentDetector::getMachineUuid()
#2 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Blt.php(92): Acquia\Blt\Robo\Blt->initializeAmplitude()
#3 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/bin/blt-robo-run.php(34): Acquia\Blt\Robo\Blt->__construct(Object(Acquia\Blt\Robo\Config\DefaultConfig), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput), Object(Composer\Autoload\ClassLoader))
#4 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/b in /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Common/EnvironmentDetector.php on line 157

Fatal error: Uncaught Error: Class 'drupol\phposinfo\OsInfo' not found in /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Common/EnvironmentDetector.php:157
Stack trace:
#0 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Common/EnvironmentDetector.php(171): Acquia\Blt\Robo\Common\EnvironmentDetector::getPlatform()
#1 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Blt.php(116): Acquia\Blt\Robo\Common\EnvironmentDetector::getMachineUuid()
#2 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Blt.php(92): Acquia\Blt\Robo\Blt->initializeAmplitude()
#3 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/bin/blt-robo-run.php(34): Acquia\Blt\Robo\Blt->__construct(Object(Acquia\Blt\Robo\Config\DefaultConfig), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput), Object(Composer\Autoload\ClassLoader))
#4 /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/b in /Users/mike.madison/git/d4g/Drupal-GovCon-2017/vendor/acquia/blt/src/Robo/Common/EnvironmentDetector.php on line 157

Additional context
Manually running composer require drupol/phposinfo seems to correct the issue, so I'm guessing either BLT or the Environment Detector need to be updated to have this as a dependency.

[protitude]

I'm getting the same bug, thanks for the fix.

[danepowell]

Thanks for reporting, I suspect this is a regression introduced by #4374

Seems like I overlooked the fact that the new class is not a drop-in replacement because of the new namespace