this change introduced in babylon@6.17.2 seems to break Istanbul's ignore next functionality in some situations. See the following code:

Input Code

'use strict'

const test = foo => {
  switch (foo) {
    case 'ok':
      return console.log('this is fine')

    /* istanbul ignore next */
    default:
      throw new Error('nope')
  }
}

test('ok')

Expected Behavior

the comment /* istanbul ignore next */ ignores the default statement (behavior in 6.17.1).

Current Behavior

the comment /* isanbul ignore next */ fails to ignore the default switch statement (behavior in 6.17.2).

Thoughts

I believe the issue is that the comment gets folded up onto the prior line, and then we fail to traverse to the default statement when deciding what to ignore.

CC: @aardito2