txt: ## cueinnanseconds.md
  class X::Scheduler::CueInNaNSeconds
  
  Error caused by passing NaN to Scheduler.cue as :at, :in, or :every
  
  ```raku
  class X::Scheduler::CueInNaNSeconds is Exception { }
  ```
  
  When calling `ThreadPoolScheduler.cue` or `CurrentThreadScheduler.cue` with `:at`, `:in`, or `:every` as `NaN`, this exception gets thrown. For example, the following code:
  
  ```raku
  my Cancellation $c = $*SCHEDULER.cue({
      say 'This will never output :(';
  }, at => NaN);
  
  ```
  
  Throws with:
  
  ｢text｣ without highlighting
  
  ```
  
  
  ```
  
  Cannot pass NaN as a number of seconds to Scheduler.cue
  
  
  ```
  
  
  ```
  
  This class only exists in releases 2019.05 and later.
  