Scenario:
1. Add next code to composer.json

{
    "require": {
        "composer/installers": "^1.0.20",
        "drupal/drupal-core": "8.0.*"
    },
}

Code is from https://github.com/tstoeckler/drupal-core

2. Execute drush composer install
3. See error: Could not parse version constraint ^1.0.20: Invalid version string "^1.0.20"

Comments

RobLoach’s picture

Make an issue over at https://github.com/tstoeckler/drupal-core . Another option is to switch over to use:

{
    "require": {
        "composer/installers": "~1.0.20",
        "drupal/drupal-core": "8.0.*"
    }
}
RobLoach’s picture

Status: Active » Closed (works as designed)