Environment

Node version: v16.14.0
npm version: v8.3.1
Local ESLint version: v8.11.0 (Currently used)
Global ESLint version: v7.23.0
Operating System: darwin 21.1.0

What parser are you using?

Default (Espree)

What did you do?

var x = 3;
switch(x){
  case 0:
  case 1: break;

  case 2:
    
  case 3:
    break;
}

ESLint Demo Link

What did you expect to happen?

No errors

What actually happened?

  8:3  error  Expected a 'break' statement before 'case'  no-fallthrough

Participation

• I am willing to submit a pull request for this issue.

Additional comments

It might also make sense to support comments:

switch(x) {
  // currently accepted
  case 0:
  case 1:
    break;

  // this issue
  case 2:

  case 3:
    break;

  // general proposal
  /* a note about 4 */
  case 4:
  /* a note about 5 */
  case 5:
    break;
}