Crashing `platform add` doesn't roll back properly

C:\Projects\Stromzaehler\stromzaehler (master -> origin)
λ cordova platform add android@7.1.1
Using cordova-fetch for cordova-android@7.1.1
Adding android project...
Creating Cordova project for the Android platform:
        Path: platforms\android
        Package: de.janpiotrowski.zaehlerstand
        Name: Z_hlerstand
        Activity: MainActivity
        Android target: android-27
Android project created with cordova-android@7.1.1
Android Studio project detected
Android Studio project detected
(node:12852) UnhandledPromiseRejectionWarning: CordovaError: Cannot find plugin.xml for plugin ".git". Please try adding it again.
    at new PluginInfo (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-common\src\PluginInfo\PluginInfo.js:367:15)
    at PluginInfoProvider.get (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-common\src\PluginInfo\PluginInfoProvider.js:35:32)
    at Function.runInstall (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\src\plugman\install.js:271:41)
    at C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\src\plugman\install.js:79:35
    at _fulfilled (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:787:54)
    at self.promiseDispatch.done (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:816:30)
    at Promise.promise.promiseDispatch (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:749:13)
    at C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:810:14
    at flush (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:108:17)
    at _combinedTickCallback (internal/process/next_tick.js:131:7)
(node:12852) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:12852) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

C:\Projects\Stromzaehler\stromzaehler (master -> origin)
λ cordova platform add android@7.1.1
Using cordova-fetch for cordova-android@7.1.1
(node:6848) UnhandledPromiseRejectionWarning: CordovaError: Platform android already added.
    at C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\src\cordova\platform\addHelper.js:149:35
    at _fulfilled (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:787:54)
    at self.promiseDispatch.done (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:816:30)
    at Promise.promise.promiseDispatch (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:749:13)
    at C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:557:44
    at flush (C:\nvm\v8.11.3\node_modules\cordova\node_modules\cordova-lib\node_modules\q\q.js:108:17)
    at _combinedTickCallback (internal/process/next_tick.js:131:7)
    at process._tickCallback (internal/process/next_tick.js:180:9)
(node:6848) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:6848) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.