Accessibility related issue for rails core.txt~

Accessibility related issues for devise gem. 
Sign up page: 
1) aria-required(property) is missing.
Email, Password, Password Confirmation are manditory fields.
aria-required: indecates that user input is required on the element before a form may be submitted.
Note: The fact that the element is required is often presented visually (such as a sign or symbol after the widget). Using the aria-required attribute allows the author to explicitly convey to assistive technologies that an element is required.
2) Validation Errors must be accessible. After submitting Sign Up form and validation error display then focouse was not shipt on the error list.    
Sign In page: