for (var i = 0; i <= 5; console.log(i++));

Real life example

While I agree this is hardly readable and should be refactored, extra-semi does incorrectly advice to remove the semicolon here, which would lead to the next line being considered the body of the loop, changing behaviour. The same issue can happen on a while loop:

var i;
while (i++ <= 5);

Real life example

A do while is unaffected because the curly braces are required there. This is on v24.1.