Checks that wrong restart "mode" doesn't crash the inspector
Paused at (after evaluation):
function foo() {
  #debugger;
}

Pause stack:
  foo:2 (canBeRestarted = true)

{
    error : {
        code : -32602
        message : 'StepInto' is the only valid mode
    }
    id : <messageId>
}
