In userland, if some fraction of the user base misuses a feature, that could be considered a bug, even if it is working as designed. Obviously things like forw

In userland, if some fraction of the user base misuses a feature, that could be considered a bug, even if it is working as designed. Obviously things like forward and backward compatibility are much more important in the programming context, so you can't just "fix" things like weird side effects or not throwing an error on assignment in an if statement.