Change Details

Because the user and site modules simply have `mw.loader.state( 'modulename', 'ready' );` injected at the end, a JS error in user-authored code causes that statement to never be reached, and the module state to remain set to `'loading'` indefinitely. There is no code setting it to `'error'` anywhere. Consequently, the promise returned by `mw.loader.using( 'user' )` is never rejected, it can only be resolved (in the no-error case) or remain pending forever (in the error case).