Plugin package failure can result in usable plugin

It looks like building HostProject for UE4Editor succeeds, then UE4Game fails, leaving a valid UE4Editor binary under HostProject/Plugins. If this is copied under Editor/Plugins, it will be found and loaded.

• open attached project in editor
• package "TestCommandletCat" plugin
• Package fails as expected with "error C2039: 'PostEditChange': is not a member of 'AWorldSettings'"
• copy resulting "TestCommandletPlugin" folder from package directory to Engine\Plugins
• run from cmd "UE4Editor-Cmd.exe -run=HelloWorld"
• -> run succeeds (see "LogTestCommandletPlugin:Display: Hello world!" in log)
• Expected: failure "Error: HelloWorldCommandlet looked like a commandlet, but we could not find the class."