Then again, it's not common that people make the mistake of confusing an array with an index. Misleading indentation is a somewhat common issue. So it makes sen

Then again, it's not common that people make the mistake of confusing an array with an index. Misleading indentation is a somewhat common issue. So it makes sense to have the latter as a warning, but probably nobody thought of adding a warning for the former, or just decided to not bother coding it up.