"crash the app" sounds like the app's problem (ie. not handling exceptions properly) as opposed to the design of the API. It doesn't seem that unreasonable to t

"crash the app" sounds like the app's problem (ie. not handling exceptions properly) as opposed to the design of the API. It doesn't seem that unreasonable to throw an exception if unexpected conditions are hit? Also, more likely than not, there is probably an explicit reason that an exception is thrown here instead of something else.