code: private Status executeFail(Stmt.Fail stmt, CallStack frame, EnclosingScope scope) {
  		throw new AssertionError("Runtime fault occurred");
  	}
docs: Execute a fail statement at a given point in the function or method body.
  This will generate a runtime fault.
  
  @param stmt
  --- The fail statement to execute
  @param frame
  --- The current stack frame
  @return