Possible defect for method patch_email_field

[OshinoMoumou]

Greetings!
I noticed that method patch_email_field referred a StackOverflow post, while a recent comment to it mentioned that the method doesn't work anymore. It wont let you do this until after apps loaded, and errors out with "Apps aren't loaded yet".
I'm trying to learn the usefulness of such small updates on StackOverflow. Would this comment help improve your code? I understand that such defect might not happen in real life situation. In that case, do you think this comment can help prevent future bugs (for example, when the code were reused somewhere else)?
I'll really appreciate it if you could kindly give me some feedback or suggestions. Thank you very much for your time.
Have a nice day!