It occurs to me that I may not have been completely clear when reporting the bug. So, to clarify:
 
The issue is happening before getLine receives the user's input. So, suppose I have a basic function that asks for my name and then echoes it back to the terminal; if I make a typo while inputting my name and then try to backspace to correct, the console will display the "^?" characters. E.g.
 
Please enter your name: Rihca^?^?^?    <--- This is what I'm referring to. 7.10 didn't do this.
You typed: Rihca
 
The expected behaviour is that when I press backspace, it will move the console's cursor back and allow me to correct the error before hitting return and having the (now correct) name echoed back . This is what 7.10 and earlier did but 8.0 doesn't.
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