{"action":"opened","issue":{"url":"https://api.github.com/repos/silverstripe/silverstripe-installer/issues/89","labels_url":"https://api.github.com/repos/silverstripe/silverstripe-installer/issues/89/labels{/name}","comments_url":"https://api.github.com/repos/silverstripe/silverstripe-installer/issues/89/comments","events_url":"https://api.github.com/repos/silverstripe/silverstripe-installer/issues/89/events","html_url":"https://github.com/silverstripe/silverstripe-installer/issues/89","id":69923727,"number":89,"title":"composer/installers change breaks composer create-project and update","user":{"login":"oddnoc","id":568583,"avatar_url":"https://avatars.githubusercontent.com/u/568583?v=3","gravatar_id":"","url":"https://api.github.com/users/oddnoc","html_url":"https://github.com/oddnoc","followers_url":"https://api.github.com/users/oddnoc/followers","following_url":"https://api.github.com/users/oddnoc/following{/other_user}","gists_url":"https://api.github.com/users/oddnoc/gists{/gist_id}","starred_url":"https://api.github.com/users/oddnoc/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/oddnoc/subscriptions","organizations_url":"https://api.github.com/users/oddnoc/orgs","repos_url":"https://api.github.com/users/oddnoc/repos","events_url":"https://api.github.com/users/oddnoc/events{/privacy}","received_events_url":"https://api.github.com/users/oddnoc/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-04-21T18:54:00Z","updated_at":"2015-04-21T18:54:00Z","closed_at":null,"body":"The change at [composer/installers@316656d40baba4d46ff60f9fc64c52e5ce6b4849](https://github.com/composer/installers/commit/316656d40baba4d46ff60f9fc64c52e5ce6b4849) breaks composer create-project and composer update in existing projects. This is the error that is thrown:\r\n\r\n\t[ErrorException]\r\n\tArgument 1 passed to Composer\\Installer\\LibraryInstaller::__construct() must implement interface Composer\\IO\\IOInterface, n  \r\n\tone given, called in phar:///Users/fred/bin/composer/src/Composer/Plugin/PluginManager.php on line 250 and defined\r\n\r\nA temporary workaround is to edit composer.json to require version 1.0.21 of composer/installers"}}